Yes, there are a few of us that did this. I posted mine option and i know someone else did as well in the ' 2014 Felt IA' thread.

You basicly cut a hole in the rubber top and remove the cal pack. Cut a part of the bottom large enough to accomodate the fuelselage.

Check the thread and you will see how its done

Works great!

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Owner at TRIPRO, The Netherlands

I've searched the 2014 Felt IA FRD thread and found nothing but what I posted above (photos). I've yet to find details I'm looking for. I'm not keen to chop up my bike until I know I can get the replacement part should I mess it up. I'm also interested to know how ineffective the CalPak becomes when you go this route. In a perfect world I'd ideally like to have space for a tube, levers, co2 but those can go under my seat. A gel or two wouldn't hurt though if there is room left over.

Thanks for the response. If there is another thread I'm unfamiliar with please let me know.

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"Train so you have no regrets @ the finish line"

Take a closer look at my post of july 17and an even better option which i use now as well but built is almost similar at aug 11 from davews09

Good luck

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Owner at TRIPRO, The Netherlands

Eureeka ... man that was hidden well. I thought I scoured this thread for this in vane. Thanks!


Two methods we have so far





http://imgur.com/a/pemPN


http://tri-run.nl/...sealage-for-felt-ia/

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"Train so you have no regrets @ the finish line"

Found a local guy who's going to build me a custom insert for my IA out of Carbon. We're going to design it to be like the one below with a few changes to suit my needs best. Somthing similar to this.

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"Train so you have no regrets @ the finish line"

Let him built 2. I'm in for one :-)

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Owner at TRIPRO, The Netherlands

If he will build 3 let me know the price, I would love one.

This price is scary right now; $900CDN ($720USD) but that is for a one off custom piece. If we have enough interested people he's said he'll make a mold and make more of these. I'm no engineer and the space in the various sized frames may differ. I can't see them making molds for each frame size CalPac but you never know. Does anybody have a IA thats not 51cm? I'll measure my CalPac and perhaps a different sized frame owner could do the same? PM me

I'll inquire in a month after this thread is dying off and however many interested people we get I'll have him give me a volume quote. Sound fair?

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"Train so you have no regrets @ the finish line"

Another option that would be much cheaper is 3D printing. This is the method that was use to make Carfrae's larger calpak on her bike. Using a 3D scan of the calpak as a starting point this should be pretty easy for someone that has experience. The printing would be much cheaper and I believe there are places you could send the model to get it printed using carbon fiber.

If the piece works as it should, then I'd say that there is a genuine opportunity for you to make some $ there.
Ask him what the cost per unit would be for 100 units.

This is a very good point but I think they used it for one race(Kona) if I am not mistaken. I'd be concerned about durability on a plastic part but then again that's likely a lack of knowledge. I asked the guy I am dealing with if he would do fiberglass (I was looking for ways to reduce cost) and this was his reply:


"With the requirements that you have and the purpose of the CalPak it makes sense to go with carbon fiber, fiberglass does not fare well under any loads and in time it will break and damage, and also the part would have to be replaced but with carbon it can be repaired but will last longer and is used to torsional stresses and load pressures."


I'm going to see what he can do for 100 units.

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"Train so you have no regrets @ the finish line"

It's not too bad if proper tooling is used. That stuff is pretty costly.

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http://www.falcobike.com
https://www.facebook.com/falcobikeglobal
http://www.twitter.com/Falco_Bike
falcobike@gmail.com

We've got 2 publicly accessible 3D printers here in our Public library so I'm going to see what I can come up with. Cost seems reasonable.


"A printing fee of 5 cents a minute plus $1 will be charged for each print job. An average print job takes about 30 minutes. That will cost $2.50 (30min x 5cents = $1.50 + $1 = $2.50)"


Now it's a matter of figuring out how to scan the original, redesign it to fit a Shiv Fuselage and a Flat Kit and then print it off. This could be fun!!

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"Train so you have no regrets @ the finish line"

Just posting some images of the various angles and customization done so far to keep things in this thread.

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"Train so you have no regrets @ the finish line"

Any progress on the scanning?

Ran into a hiccup but I've made *some* progress. The biggest issue so far is scanning the item doesn't give me a workable file format to manipulate in a CAD software. Trying to take this approach ended up being a waste of time. I went back to the drawing board and I'm hoping to get a much more capable designer/engineer to help but we shall see how that goes. I'll update this thread as things progress. I may end up spending an absurd amount on this but through that hopefully I can give others with the IA options for internal hydration. I'm still trying to gauge how many others want such a accessory and how much people are willing to pay. I'm not looking to profit from this but get a group together to reduce this from a one off price for a custom part to a bulk order.

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"Train so you have no regrets @ the finish line"

Any chance you can send me the file?

I would also be very interested in buying a piece like this.

I would be interested in purchasing. What are your initial thoughts on price?

As an aside, superdave from felt said he would give the 3d printed file they used for rinnies custom calpac to someone else in the main ia thread... May be worth asking yourself,rather than trying to scan

I've spoken with cshowe80 and explained the challenges in execution.
-SD

Just wanted to bring this thread back to life. Have there been any new developments?

This would be awesome. Integrating it with a gravity fed Aeroz BTA would be a sweet setup.

Those are some good images. but l am still baffled what the 'no fish' symbol means on the shiv diagram ...

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Advanced Aero TopTube Storage for Road, Gravel, & Tri...ZeroSlip & Direct-mount, made in the USA.
DarkSpeedWorks.com.....Reviews.....Insta.....Facebook
--

I hear SuperDave is working on one in his spare time. Ask him about ETA. ;) /pink

I fell short of my goal and had a tough time dealing with designers I had lined up to help with this project. As it stands I moved to a Torhans Aero30 which actually gives the IA better CdA numbers. I'd still like to have an internal hydration system for long course however. Anybody who comes up with anything please let us know!!

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"Train so you have no regrets @ the finish line"

Hi all, this is my first post on this forum. I've come across Slowtwitch for answers to so many questions already, but now I've got something to add to a discussion for the first time. I have been attempting my own modification to my 2015 Felt IA3 to accommodate a drink bladder, and I have made a solution that I think might be of interest to some people.

I have designed a custom 3D printed panel to replace the original Calpac and have it available for order on Shapeways. I realize that this may be a bit of gray area in terms of forum policy, since I am effectively marketing my own design here. But I just figured I might be helping some people out who have been looking for a solution on this forum.




I hope the Shapeways page is clear by itself, but here is some background to my solution: I went for the easiest approach I could think of, with no modification to existing parts of the bike. The panel effectively replaces the Calpac, and sacrifices any additional storage. I haven't been a fan of the amount of effective storage in the Calpac anyway, so I don't mind. With the Fuelselage added, there is so little left anyway. Since the Felt have a narrower frame, the Fuelselage will hold approx. half it's design capacity.

Note that this design accommodates a size XS/S Fuelselage in a 54cm Felt IA, which will accommodate up to 400ml of fluid. The product on Shapeways is in beta, since I haven't been able to test it on other frame sizes (I don't know anyone else who owns one, I live in the Netherlands, perhaps people could reach out to me). I will be designing a version that will accommodate the M/L/XL Fuelselage (1000ml, should fill up to 500ml) in my frame too, this should be available within 1-2 weeks, as I am awaiting production and testing the part myself. Sneak peak below:

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

What an incredibly neat idea! I'll probably order your second version for my 51cm IA. Now if only Felt would release a draft box of some sort...

Hoi, heb je idee gelezen. Ziet er leuk uit en lijkt op het ding wat ik twee jaar geleden al eerder heb gemaakt van de gewone calpac om een shiv fuelselage te gebruiken in de Felt IA. Wij verkopen de IA's veelvuldig en het kan misschien iets zijn voor de winkel. Ik heb zelf een IA frd maat 56 dus als je wat wilt testen laat maar weten. Ik ben alleen wel benieuwd of je niet in strijd bent met het Specialized patent omdat je commercieel gebruik maakt van het design en de vorm voor gebruik van hun fuelselage in een niet specialized waarbij zij het paten hebben om deze exclusief in een specialized frame in te bouwen. Ik ben bang dat je je heel erg dicht tegen de grenzen aan of over de grenzen heen gaat van hun patent. Be carefull, maar neem contact met me op om wat verder testen voor zolang dat kan.

Grt

Jeroen van Geelen
Tri-Run.com

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Owner at TRIPRO, The Netherlands

Good job! Count me in for version 2 when its ready

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''Sweeney - you can both crush your AG *and* cruise in dead last!! 😂 '' Murphy's Law

I have received my first print of version two. I'll be running it through the wringer later this week and make it available for purchase if all is well, perhaps with some minor modifications. I'll keep you guys posted!

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

Be careful, you're in violation of a US patent on that part you're making (and selling).
Good luck.

-SD

It looks good. Can you also make a cover for use when you are not using the bladder?

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''Sweeney - you can both crush your AG *and* cruise in dead last!! 😂 '' Murphy's Law

I guess I could, but making it sit firmly is not very straightforward. I would recommend switching back to the regular Calpac otherwise, replacing it is really just a minute's work.


I have looked up the patent and it claims the rights to make and sell two things:
1. A bicycle with bladder/storage systems with various features
2. The storage systems itself, i.e. the Fuelselage

With my best intentions I am not violating either of these claims. I am simply making a modification to a different bike, and in fact purchasing the storage system that is patented.

Now I can imagine that, since my design reflects the specific shape of the Fuelselage head, I may be breaching something else by making this cover available commercially. But I'm not aware of how all this works. If I'm being told to stop, I probably will, but for now I'm just DIYing and responding to some demand among some enthusiast triathletes.

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

How about just a sleek flat matching cover with the screw holes to put on the frame when not using the bladder.

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''Sweeney - you can both crush your AG *and* cruise in dead last!! 😂 '' Murphy's Law

A simple flat plate to replace the Calpac would also allow use of a standard bento box especially if provided with standard bottle mount spaced mounting points. Am I correct in thinking the original IA and the IAx frames have slightly different Calpacs and perhaps have a different footprint and screw locations? If you did that in an IAx compatible version I'd get two!

Yes, I need IAx. I thought both IA's used the same piece of crap.

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''Sweeney - you can both crush your AG *and* cruise in dead last!! 😂 '' Murphy's Law

I think there was some modification between the two but I'm not certain. If so, I don't know if this applies just to the cover, the cover and the shape of the lugs and bowl of the hard piece or if the mounting footprint and screw centres are changed too.

So the Calpak on the IAx is the new improved Calpak?! Wow, the original must be a real POS

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''Sweeney - you can both crush your AG *and* cruise in dead last!! 😂 '' Murphy's Law

This is awesome, I will be ordering one to try out. I agree with Sweeney and others that a deeper, usable Calpak like Carfrae's or just a flat panel with bosses to mount an external bento would be awesome additions. I'm basically using the Calpak as the Di2 Junction A holder, with a spare tube tucked in, but cant really fit anything else.

So basically you guys are after something that looks like the small version of my mod, but without the Fuelselage cutout?This is a piece of cake to make, I might be able to do it tonight or tomorrow. I believe the Calpac are the same from the 2014 models onward, at least that's what this website suggests. Visually the rubber cover looks the same on all pictures I can find of the IA10, A16 etc.

I must say I really like the bento box idea too! I haven't put much research into this, but Trek and Cervelo bikes have these mounting holes, am I right? I just need to figure out the spacing needed from the rear of the stem, any feedback is appreciated.

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

Has anyone ordered one from him yet? I would be really interested, just want to make sure its legit!

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Insta: Trihennessy - Out Rival Racing Elite Team
- Roka - WattieInk - NormaTec - QUINTANA ROO - Profile Design - Pioneer - Gatorade Endurance

Yes exactly.



Rather than having exact water bottle hole spacing you could make 2cm slots for each hole that would allow custom positioning of whatever gets attached to the plate, like how a lot of water bottle cages are currently (xlab Gorilla comes to mind as I have one) that have a channel for the attachment screw. This way 95-99%% of the bento boxes and bags could be used and positioned for optimal spacing snug against the stem.

There's two ways you could go about this.

1. Figure out a good longitudinal position for the holes that should suit everyone
2. Just do a flat plate and everyone can drill holes wherever they want them, or use it as a simple blanking plate or the basis of any other innovations that come to mind - for example I'd consider putting a gel dispenser there (drill the plate for a gland fitting to pass a straw through from a small bladder or bottle beneath) or build a salt dispenser or somewhere to stick course notes. There's loads of possibilities.

You could perhaps provide a thicker strip down the middle to allow sufficient depth to tap a hole (if the material is stiff enough) or just to provide a bit of rigidity.

He's selling it through a 3rd party e-retailer (shapeways). I haven't ordered one, but generally these companies make sure you get what you pay for.

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just your average age grouper . no one special . no scientific knowledge . just having fun.

As mentioned above, Shapeways is basically the 'middle man' here, which is a reputable company in my opinion. Technically you would be their customer, and not directly mine. They have requirements per material choice with which models have to comply before I can make them available for selling. If anything goes wrong with production, they will take care of it and make sure you get a part in good order. That's as far as legitimacy goes.

So far 3 people have ordered the small version I have available now, but I haven't had feedback from them yet. Also I don't know if there's any Slowtwitchers among them. I understand your caution though, you are right to be cautious. I don't run a business here and there's limited R&D involved (just myself and my own Felt IA3), and I can't make guarantees. But hopefully people are willing to take a chance and like what I've come up with :)

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

I ordered and promptly received one. Very nice. Simple. I'll put one on an IA10 next week and post pictures.

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Jim Manton / ERO Sports

Okay awesome! It will fit on any size ia right?

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Insta: Trihennessy - Out Rival Racing Elite Team
- Roka - WattieInk - NormaTec - QUINTANA ROO - Profile Design - Pioneer - Gatorade Endurance

I ordered one last week and should arrive next week. Looking forward to trying.

This is where I can't make guarantees, but it should fit all IA frames. Felt makes only 1 version of the Calpac, and therefore the panels should fit to all 2014+ IA frames. The main thing I cannot verify is how well the Fuelselage will sit inside the down tube with respect to the cover. Again, I think it will fit fine on all frames, but I just haven't been able to verify it.

Note that on Shapeways the part is also in beta, with a notification that I have only tested in on a size 54cm.

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

I've got the new version available for order on Shapeways. I took it for a 100k ride today and it worked as I had hoped. This version is twice the cost of the smaller one, this is due to increased material volume and machine space required.

I did make some minor improvements to the design to add some stiffness locally, so the part will show up as "First to print" on Shapeways.

I'll make a flat cover tomorrow, for those who wish to pursue the bento box mod or whatever other reason. If you're interested in both, then wait until tomorrow to save some $ on shipping :)

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

Here's a go based on your suggestions. I've added a thicker strip, and I'd like to hear your thoughts on its dimensions. Currently its about 15mm wide, and 3mm thick (2mm for the entire plate, +1mm added thickness). I think these dimensions suit your ideas well, but I'm open to feedback. Keep in mind that more material means higher cost.

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

That's pretty much what I had in mind. I assume the spine is on the underside and doesn't collide with anything that would prevent the plate from sitting flat?
Not being familiar with the material I don't know if the thickness is sufficient or excessive but it seems like the right ballpark.

What size bladder will I need for a size 56 IA16?

Can you offer a package price for ordering both the Fuelselage adapter and the flat panel?

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''Sweeney - you can both crush your AG *and* cruise in dead last!! 😂 '' Murphy's Law

Yep, spine is on the underside, so won't show when mounted. I've also taken care it won't collide with anything. The thickness seems right to me, I have the small Fuelselage panel as a reference, which is 2mm thick. It does flex over the entire length, but it is quite stiff already, so the spine will make it a little stiffer to be sure. I won't be drilling into the panel I have, but I think the 3mm will be fine.

I'll put the product in beta mode on Shapeways and I'd like to hear if it works as expected. I won't be ordering one myself immediately, I'll keep an eye out for a bento box I might want to try out some time. Keep in mind that the IA frame is no longer flat further from the stem, this may limit your options of bento boxes, especially if you're planning to mount a rigid one:

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

Bladder size only depends on which panel you get, assuming the frame shapes are very similar at the front (this is what I'm trying to figure out in beta). With the larger panel, get a M/L/XL Fuelselage, fits quite well in my size 54 IA3, should work with yours.

I've had a look, but Shapeways doesn't let me do stuff like package pricing. I make a relatively small markup on these things, so there isn't much room for me to do anything significant anyway. You may be able to find Shapeways coupons for $10 off or free shipping on first orders though, try a search.

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

These are great! Thanks so much for putting this together. I see the flat cover for order in beta, but the large Calpac fueselage cover is showing not for sale?

I was working out the last details of the updates I made, it's available now.

Also I have been getting a few questions with regards to which panel people should order, so in order to clear things up I made a little drawing:



So basically you choose the panel by which size Fuelselage you have or are planning to buy, how much money to spend, and possibly aesthetics. The larger one is twice as expensive due to the additional material that needs to be 3D printed. Also to reiterate, as explained on the Shapeways page, both bladder sizes will only fill up to about 50% capacity since the Felt frame is narrower.

In terms of the beta state, the above situation is what I've found on my size 54cm Felt IA3. I don't know how the shape of the frame varies with size, so it's difficult for me to predict how well the bladders will sit with different frame sizes. Hence the call for feedback when people find out :)

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

Thanks for all the work. Just ordered one. How did you guys remove the hard plastic part from the frame. I unscrewed the screws but it feels like it is epoxied onto the frame. Thx.

First, thank you for taking the initiative in creating these mods!

If you used the new mod for the 1000ml fuelselage but used the smaller 800ml fuelselage instead, do you think you would get more than 50% fill for the small?

You wouldn't. I have both sizes of the Fuelselage and neither fills up more than 50%. I thought the same thing after I had ordered the larger version at first. I've even trimmed down a Fuelselage to remove any excess material hoping that it would increase the fill, but to no avail. I am pretty sure that the thickness of the downtube of the Felt is the limiting factor here.

If you would use the 'newer' mod that's higher, the Fuelselage won't sit well in the frame at the 'bend' from top tube to down tube. I've made separate mods for both versions based on how they fit best in the frame I have.


I actually own a second hand IA, so I haven't been the first to remove the calpac on my bike!

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

One screw has some black glue or paint on it. Peel that up, unscrew the screw under it, and it will come out.

That's a slick piece of work, very well done!

Thanks for this awesome work! just ordered both. do you mind to provide with the dimension of the cover? thinking to fit a Torhans AeroBento on it.

Mat

A CAD drawing would be great if you have one you don't mind sharing? If not I quite understand.

Below are the relevant measurements. Important to know are the shifter/rear-brake cable cutout at the front, and the arc at the rear. The panel itself is cut off straight at the rear, but there is a small level part on the frame with the arc where the Aeropac lid sits, this is some extra space to fit a bento box. Behind this point the frame goes up a little and isn't flat anymore, so a rigid bento box won't sit nicely if its longer.

Looking at the Torhans Aerobento, which is supposedly 19cm, it may barely fit, depending on how much space is left for the cables. Otherwise you might want to modify the bento a little by removing some plastic at that location. Also, if you have a Di2 set-up it may be easier to work if just the rear-brake cable has enough space.

P.S. I don't intend to share the CAD files just yet, but I'll provide you with all the measurements you need.

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

I've been getting messages from Shapeways that models have been successfully printed. So hopefully some of you have taken delivery and will be trying them out soon. I would love to hear your feedback on how they work, especially with different frame sizes!

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

Got it today. So easy to install. Did you purchase your Fuelselage on line or did you have to go to the store?

Thx

Haven't found it online, I think it might be a dealer order item only. Haven't even found them at Specialized bike stores locally. Let me know if you find it somewhere.

I had to order mine through a SPEC dealer,it is not something they stock in all likelihood. I could be wrong but that was my experience

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"Train so you have no regrets @ the finish line"

There were some Dutch online shops that had a few in stock, but they were all specialized dealerships.

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

I snagged one at my lbs today

I had a local shop call Specialized and apparently they are out of Fuelselage kits until mid August. Anyone know where I could source one? Looking for M/L for my 54 IA10. What are the big Specialized dealers in the US?

I've had similar issue trying to source a QR Qbox, Trisports has had them backordered since the end of February, but I called a local shop and they ordered one for me, which should hopefully arrive soon. It should fit much better than the Bontrager draft box.

My optimal setup would be a single rear bottle cage, the fuelselage mod for Calpak (have the bracket from Fluc), a BTA bottle, and the Qbox for storage, unless Felt or anyone else comes out with something better for the IAx series rear seatpost mounts...

Shame to hear it's difficult to get a hold of a Fuelselage. I've noticed the same thing seems to apply to Torhans AeroBento in European online shops.

Has anyone else had good luck with getting a Fuelselage and trying my panels? Still looking for feedback, positive and/or negative!

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

To all people holding out on buying one of my panels, there's a 20% discount on Shapeways this week for the material I've chosen for my products (Strong & Flexible plastic). The info is all on the Shapeways website, but it basically requires you to use the code 'SFONSALE' at the checkout.

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

Question for you FLUC, or anybody.

Will the 800ml mod (the flat one) work with a frame bag on top of it? Anybody else have pictures of there mod on the bike?

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just your average age grouper . no one special . no scientific knowledge . just having fun.

No first-hand experience, but I think you should be able to fit a flexible framebag on top of it. However, that would mean you are covering the refill cap, so you lose the ability to refill the Fuelselage. Since it can effectively carry only 400ml in a Felt IA frame, you should think about how useful this will be for you, versus other replaceable/refillable liquid storing options.

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

I ordered a fuelselage from Spokes in Illinois on line.
The most challenging part of refueling is to keep the mouth of the fuelselage open then it is easy to fill

I installed my Calpac and the thing is awesome. There is a magnet that comes with the fuelselage that allows the tubing to be secured in place along the aerobar so it doesn't go flopping about. I'll post a pic when I can.

One problem that I've run into is that it is a bit harder to fill the fuelselage while biking. Because the Fuelselage wasn't designed for the Felt and, as such, doesn't open up completely in the downtube, it results in fluid not filling the reservoir quickly and overflowing. I've put in another camelback tubing to create a channel for the fluid to go down which helps some however it still takes a little while to put the 16 oz into the fuelselage. Has anyone figured out a better solution? I think the ideal way would be to have some brackets that would create a scaffolding to keep the bag open but I have no idea how to do so.

Thanks for the feedback! I've had this issue, but solved it with getting the Fuelselage to sit better in the frame. What works for me when this happens: when you've put the Fuelselage in, try pushing the drinking tube a bit further into the frame as well. On my bike, this slightly pushes the Fuelselage further down and creates a nice opening in the 'neck' that allows fluid to fall down rapidly. Remind me, what size frame do you have, and which Calpac adapter did you get (small or large)?

Meanwhile, I've been using it happily for quite some rides. Did my first-ever race last weekend (IM70.3 Luxembourg) and it didn't let me down. Aid stations on the bike leg were quite short, so I had little time to grab 2 bottles and use 1 to refill the Fuelselage before the trash-zone at the end of the station, but I managed well! When you're in such a hurry there's some spillage, but I don't care, especially not on race day.

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

Thanks for the reply. I have the Felt IA Calpac cover w/ 1000ml Fuelselage mod (http://www.shapeways.com/...od?optionId=59905518) and the large fuelselage. Frame is 54 (which I believe is same as yours). Perhaps I'm not pushing hard enough. Will try when I get home. Do you think that adding a little fluid before inserting the fuelselage would help to keep the sides from adhering.

Am planning on carrying a BTA bottle and 1 rear bottle in addition to your mod for each 70.3 segment. Figured 2 x 27 oz bottle and 16 oz in your mod should cover me.

Correct, I use the same cover and frame size. I usually blow some air into the Fuelselage after I've installed it to make sure it expands as much as it can. You can do the same after you've added some fluid, see which works best for you. Getting the Fuelselage to fit well can be tricky. Some days I get it straight away, other days I can spend 15 min fiddling before I succeed.

By the way, I also use a Camelback mouthpiece instead of the one provided with the Fuelselage. The one from Camelback closes off the drinking tube, so that the fluid doesn't fall back down. This makes sipping easier as you don't have to suck the fluid up the drinking tube. The Camelback mouthpiece is actually made for a smaller diameter tube, but you can fit it on there because its flexible.

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

Has anyone tried this mod and not been happy with the design or performance?

I can't seem to get the bladder in correctly. I can get it in, but can't fill it at all.

I have a shiv but I use a bent coat hanger. Just bend it and use the blunt end and shape it your your frame and then use it to push it down and then gently slide the hanger out.

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2019 T-Rex Tri Series

I had accidentally cut my initial tubing a little short so I replaced it with some Camelbak tubing. I used the one that I cut short and placed it inside the Fuelselage pouch to help provide a channel for the fluid to fill as well as giving it an additional stiffness when jamming the fuelselage into the frame. I try to place it opposite the side that the other tubing is. It works really well. Fluc had mentioned blowing it open when you put it is but I find that this didn't work for me

Fluc, if you are reading, how do you keep the rear part of the fuelselage that sits on the frame from popping out. there was a screw that came with it but it doesn't fit the hole.

The hole on the panel is designed for an M5 countersunk bolt (like this one), you should be able to get it at most hardware stores. Make sure it is regular steel, not stainless, in order for it to be magnetic. There is a magnet on the fuelselage that should stick to the bolt. The magnet isn't very strong, but I believe the Shiv uses the same principle and it should keep it in place. However, when I put a 1000ml Fuelselage in my IA it sits very firmly by itself, I believe the 800ml is a little more loose.

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

Could you post (or pm) a few photos of how you're putting the bladder in?

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

Went on shape way site can not find product could use some help on location

the link is in the signature line directly above your comment.

https://www.shapeways.com/...000ml-fuelselage-mod

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just your average age grouper . no one special . no scientific knowledge . just having fun.

I just ordered a 1000ml. I will let you know how it works when it gets here.

A solid review would definitely help

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just your average age grouper . no one special . no scientific knowledge . just having fun.

I have compiled a small document with some installation tips. I hope this helps those having trouble getting the Fuelselage to work well in the Felt IA frame.

Furthermore, I am still eager to hear feedback from people. I would like to 'mature' the products past their beta stage, but cannot do so unless people share their experiences with me. I have so far only have one experience shared from someone with a size 51 frame, but would love to hear from people with size 56 and 58!

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

Hi Fluc - Thanks for the installation tips. You will definitely hear from me next week since I will have more free time to get it installed as my kids will be away for a couple of weeks to my parent's house!

Got a 56 IA10 frame. Just curious what is the brand/model of the box set up on your frame ? is it a torhans? thx!

Hi Mat, looking forward to hearing your feedback :)

The box on the frame is another custom creation of mine. Here's my post in the Felt IAx thread about it. In short: very expensive to print, needs some more design work and different frame shapes make it a lot of work to get right. I probably won't be making it available on Shapeways because of that.

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

Which bento boxes have people tired? Any advice on which one to pick?

Thanks

Hi, I was wondering if you know of anyone that has had success in bolting a bento box (like the Torhans) to your DIY Felt IA Calpac cover? If so, would you have any photos to share?

I have used the Torhans. I created a 3d printer file for the holes on the Torhans, you are welcome to it. If you have access to a printer it shouldn't take more than an hour.

Adrian

I don't have a printer, and was going to just drill and tap into the cover plate. Do yu have a photo of how the Torhans looks on the IA? I'm concerned that it's too tall and will look out of place. Thanks.

Has there been any success in printing a copy of the deep CalPac as used on Carfrae's Kona bike?
Not keen on the original Felt cover on my IA1, but I don't want to waste the space in the frame, as a good stash point for nutrition...

I did consider such a design, but I never followed through because of it turning out to be prohibitively expensive. For example, I would estimate that printing at Shapeways would be 300 USD or more.

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

If you can get the cost down I guarantee you there are a lot of us looking for that storage solution.

I know this thread is old, but I just ordered one. I was riding yesterday and when I got back home I noticed my cover was gone. I guess I lost it on the ride, it just gave me a excuse to get this. Any updates on how these are holding up?

I have a IA10 in 51 and a IA14 in 54 & 56.

Has this been tested on all of these yet or does it need to be tested on them still?

-Eric

I would be happy to print these for people.

I only have a 54 to test on though.

What format are your current files in? I'd be willing to send you some additional bucks to cover what you'd make off of some Shapeways prints to be able to get these into more people's hands.

Ordered it for my Felt IA16 54CM. I reinforced the Calpac cover, 'cuz I know I'd abuse it from sitting on it. I'm not a gentle guy. Lol. Anyways, the mod works great. I'm in Imperial Beach Cali. I ordered my Shiv Fuelselage from 2 Wheels Cycling Boutique (I couldn't find it available online). Big shout out to Christian and his crew!
Anyway, I used Gorillas epoxy to reinforce the inside of the cover. I also picked up the bolts and nuts at Home Depot. Pictures with part numbers. Nope. Pics too big?
This is my first post. I may have to edit. Thanks for letting my stalk this site. Lol

Racing IMSR May 12 & IMPh June 3.

Hi Fluc,
You have done amazing work. I saw your product on Shapeways. I have IA | ADVANCED | FORCE ETAP AXS | 2020 in size 54. Unfortunately, no shops have the Shiv Fuelselage in Medium at this time. So I have two questions.
1. Can I order your 800 ml solution and Shiv's small fuelselage (which is available in few places)? Will your 800 ml solution fit my 54cm bike?
2. Can you guide me how to get a Shiv Fuelselage in Med/Large size?
3. Will your 1000 ml solution work with Shiv's small fuelselage?
Thanks and great work!

Hey there, and thanks for the compliment! I don't know the latest on Fuelselage availability, as I'm also not affiliated with Specialized in any way. So I can't really help you out there.

But I can clarify your other questions: yes, you can also work with the 800ml Fuelselage. You just need to make sure you get the appropriate Calpac cover for it (the flat one). If you get the 1000ml cover your Fuelselage won't sit well in the frame. That is because of the vertical distance between the bladder's cover and the intersection between top tube and down tube on the Felt IA, which determines how high the fuelselage is supposed to sit.

Best of luck!

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Felt IA Calpac mods on Shapeways:
800ml Specialized Fuelselage (XS/S)
1000ml Specialized Fuelselage (M/L/XL)
DIY cover

Hello and awesome work!
I've been trying to get in touch with you but the shapeways website always gives me an error message. I have a 2020 58cm Felt ia, and wanted to get a cover but maybe not lose all the nutrition space? Have you tried that? Fitting 2 gels would already be great. I already have the 1000ml fuelselage. Also, I'm overseas so wanted to check how we could make it work... Thanks!

I think I have messaged you this morning directly through the shapeways sites.
Looks like a great product.

Could the plastic be lightly sanded and painted to color match the bike?

Can anyone confirm if they have used this mod with di2? I use the stock Felt box towards the front of the box for my wires and large junction Di2 box.
I am ready to move forward if anybody has had success with the di2.

Thank you.

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2019 Felt IA3
2022 Giant TCR Pro
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