Has any used an aftermarket aero extensions yet? Something like the Drag2Zero Ergo Hi-Rise. Just wondering if they function well with the base bar and the 10-degree pad shim (or after market shims)

PS We will not redesign for 2020 ;)

Hello GatorRacer
May I just suggest for 2021, new basebar wings. We are 6 in my squad to own a Shiv Disc and 5 of us are touching the basebar with the knees when standing on the pedals (and I am not talking about a pure sprint, just a common "relaunch" or steep section where you need to go off the saddle).
I don't know if others here have also to complain about it but for us, it is really a shame as this bike (especially when you train in a hilly area) is otherwise close to perfect.
I tried to attach a picture with quick draw of what I am meaning (a design directly more forward after the tilting bolt to offer clearance for the knees).

Thanks for the reply.

Hello GatorRacer
May I just suggest for 2021, new basebar wings. We are 6 in my squad to own a Shiv Disc and 5 of us are touching the basebar with the knees when standing on the pedals (and I am not talking about a pure sprint, just a common "relaunch" or steep section where you need to go off the saddle).
I don't know if others here have also to complain about it but for us, it is really a shame as this bike (especially when you train in a hilly area) is otherwise close to perfect.
I tried to attach a picture with quick draw of what I am meaning (a design directly more forward after the tilting bolt to offer clearance for the knees).

Thanks for the reply.

You are mentioning "There is a custom extension based mount that allows a bottle cage between the arms or a computer mount."- Where would you get this mount from?

It has a zero offset but ... it is weirdly named for this bike : the 25mm forward. It put a mess with many european retailers asking for a 0 offset (like the one of LC on your link) receiving a 25mm rearward one. And eventually the one you are looking is named 25mm forward or something like that. I gonna check tomorrow.

Hi NTQ237 and enricobraglia

I see your concerns of confusion. The SHIV Disc has 2 offsets available. Spec is 0mm offset, which LOOKS like a traditional -20mm offset or so, because the Seat Post head is hung off the back of the post body.

Aftermarket, the +25mm seat post is available for those who need it for fit, or in some cases where the saddle height is so low, the standard post interferes with the hydration system.

The +25mm post, LOOKS like a traditional 0mm offset post (directly on top of the tube), but it is not. The reason for this, is that the bike's seat tube is moved forward relative to the axis of the BB, to allow additional room for the hydration system.

Unfortunately the picture on that Italian website is incorrect

The ref you are looking for is 28119-3605 ;-)

thank you very much ;)

Hi,

I am interested in a shiv disc and need your help !

Here I went through the forum and it turns out that I have to make a choice between the size XS and S.
Normally you advise to take the size S and after several discussions with owners and despite a postural study which recommends the size S screw compared to the XS, looking at the manual and talking to someone who owns a SHIV in size S, I'm not sure the saddle extension is adequate with my measurements and the rear foil.
I measure 1.68cm with 82cm inseam and my saddle exit is 72cm.

When I check at the specific geometry:
- The seat post length is 350mm in both XS and S size
- The seat tube length is 490mm in XS size and 522mm in S size.

In the manual, it was mentioned that the reservoir may limit the seatpost insertion and the minimum insertion of seat post is 75mm and the maximum is 200mm.

So if I calculate the saddle extension on the two frame sizes, we get to this :
- the maximum saddle extension for the XS is : 490 + 275 (seat post length - minimum insertion) = 765mm
- the minimum saddle extension for the S is : 522 + 150 (seat post length - maximum insertion) = 672mm


But the problem is that these measurements do not take into account the height of my saddle (Prologo T-Gale) from the rails = 50mm.

So if I add my saddle height at the previous dimensions, I get this :
- the maximum saddle extension for the XS is : 765 + 50 = 815mm
- the minimum saddle extension for the S is : 672 + 50 = 722mm (so bigger for my own saddle height)


Which would mean that Specialized (and my postural study) advise me an S frame where I could not put my correct saddle height unless I cut the rear foil ? Are you agree with my calcul ?

So If I am not wrong, I therefore have no choice to take a size XS (or go to S size and change my saddle).

@GatorRacer Many thanks for your answer !

So it will be better to go to the S size even if I will be in the "small settings" of this size rather than the XS which could perhaps favor a more aerodynamic position with my size ?