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DIY disc/How important is hub choice?
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Rocky
Feb 27, 04 11:02
Post #1 of 16 (234 views)
DIY disc/How important is hub choice?
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I'm making a DIY disc wheel and I am selecting a wheel to start out with. For the purpose of argument what I am most concerned about is top-end speed (downhill, tailwind), and budget is also a concern (hence the DIY disc).
After bargain shopping my options are:
--Ultegra hub built with either a cxp33 or open pro rim.
--cane creek aerohead wheel
--mavic cosmos wheel
--My own 105 trainer wheel with semi-aero rim (this is my cheapest option, but I will then have to buy another wheel for training.)
Durability is the lesser issue since I won't be using the wheel much. So the basic question is will the Ultegra (or other rim) hit a faster top speed coasting down the same hill as any of these other choices?
cerveloguy
Feb 27, 04 11:35
Post #2 of 16 (214 views)
Re: DIY disc/How important is hub choice? [Rocky]
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I'd assume that Ultegra hubs are as good as anything else providing they're in good condition. I have a real cheapie disc wheel- CH Aero covers purchased second hand on ebay for $30. and a Mavic GL330 tubular rim with Dura-Ace hub (front and rear wheels) purchased on ebay for $100. Works as good as any disc on the market.
Kentiger
Feb 27, 04 11:42
Post #3 of 16 (204 views)
Re: DIY disc/How important is hub choice? [cerveloguy]
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-wonders to self-
Now why on earth didn't I just use the old Pawsh carbon covers I have, laying around collecting dust, on one of my set of race wheels..rather than going out and buying a Renn? Damn. Oh well..now I have a few options. Any time you want to compare and see if your set up is as good as the real deal cerveloguy..drop me a line...I think I have enough room in the back of my truck for all my race wheels..maybe.
john
Feb 27, 04 11:44
Post #4 of 16 (202 views)
Re: DIY disc/How important is hub choice? [Rocky]
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I wouldn't go with the Aerohead or the CXP 33 as the V shaped rim won't work as well with the CH aero cover. The only problem I see with the Cosmos is the lower spoke count may require more frequent truing.
My vote would be for the Ultegra hub and an Open Pro or MA3 rim with 36 spokes. More spokes will give you a stronger wheel and there will not be an aerodynamic penalty if the spokes are covered.
mwbyrd
Feb 27, 04 11:52
Post #5 of 16 (195 views)
Re: DIY disc/How important is hub choice? [Rocky]
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What's a DIY disk wheel? Is it "Do It Yourself"?
Be yourself, it's a lot easier that way!
Kentiger
Feb 27, 04 11:54
Post #6 of 16 (190 views)
Re: DIY disc/How important is hub choice? [mwbyrd]
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nail on the head...give that man a prize (hey Tibbs..we got any second hand racing thongs left for the man?);-)
mwbyrd
Feb 27, 04 11:54
Post #7 of 16 (190 views)
Re: DIY disc/How important is hub choice? [john]
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How often do you have to true your wheels? I've been banging on a pair of Bontrager Selects for over a year and there still straight.
Be yourself, it's a lot easier that way!
Rocky
Feb 27, 04 12:15
Post #8 of 16 (175 views)
Re: DIY disc/How important is hub choice? [john]
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I wasn't specific enough--I'm using a product called monokote (not the CH wheel covers) to make the wheel, (instructions and discussions posted on this site in recent weeks) but I take your point about higher spoke count because I also neglected to say that I'm a clyde.
(This post was
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by Rocky on Feb 27, 04 12:17)
mwbyrd
Feb 27, 04 12:16
Post #9 of 16 (173 views)
Re: DIY disc/How important is hub choice? [Kentiger]
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Only if it's hot pink or glow in the dark yellow - and XL in the pouch...
Be yourself, it's a lot easier that way!
Kentiger
Feb 27, 04 12:18
Post #10 of 16 (170 views)
Re: DIY disc/How important is hub choice? [mwbyrd]
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lol...wayyy too much info...and sorry..only have the one model..all white with black and red logos...sounds like you might be Kenny Souza in disguise...lol...oh yeah..one size fits all
Rocky
Feb 27, 04 12:31
Post #11 of 16 (160 views)
Re: DIY disc/How important is hub choice? [Kentiger]
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This is getting close to "the ladies of Slowtwitch" thread. Any other opinons on the merits of different hubs?
mwbyrd
Feb 27, 04 12:55
Post #12 of 16 (147 views)
Re: DIY disc/How important is hub choice? [Rocky]
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Rocky,
I've kind of been on the hubs thing too. Everyone talks about the Aero advantage, but to me the hubs play a big part (at least in my mind).
I'd also check out American Classic, Chris King, even Bontrager. My Bontrager wheels are fast. I kept up with a buddy running a pair of HED3's a couple weekends ago - coasting down a big hill.
Something along the lines of 24 spokes should be a solid wheel for what you are doing and keep the weight down.
Mike
Be yourself, it's a lot easier that way!
Kentiger
Feb 27, 04 13:06
Post #13 of 16 (138 views)
Re: DIY disc/How important is hub choice? [Rocky]
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Okay..serious now..hubs...if money were no object (and if you're doin it yerself it probably is) some better hub choices would be Hugi (the swiss make so many things run so smooth), AM Classic, and anything Zipp (although those ceramic bearing versions are good/bad depending on who you ask). Those aside I think that a well kept (read frequently repacked and checked for pitting) pair of Ultegra hubs run as well and coast as far as just about anything out there. Anything in the Shimano line below it might (I say might as my disclaimer since I am not totally informed and have learned that lesson well) not have bearing quality or tolerances that compare..and to buy them might not be the best choice for the long haul. Certainly not for a larger rider. Spoke counts of over 32 seem, to me, a bit much regardless of rider size. Keep us posted on how the build goes.
john
Feb 27, 04 13:11
Post #14 of 16 (135 views)
Re: DIY disc/How important is hub choice? [mwbyrd]
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Not often, but:
(a) I'm not a Clydesdale
and
(b) I don't build my box section rims with just 28 spokes like a Cosmos. If the original poster is applying a DIY cover, he probably wants it to stay on there a long time so he never ever has to true it.
Med Tent Man
Feb 27, 04 13:46
Post #15 of 16 (122 views)
Re: DIY disc/How important is hub choice? [Rocky]
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As the original poster of the instructions for applying Ultracote/Monokote to make a DIY disk wheel, I would suggest using a rim like a Mavic Open Pro with 32 spokes, for the following reasons:
1) 32 spokes makes a solid wheel (when tensioned and stress-relieved properly) that won't need to be trued (you can true it through the rim, but if you break a spoke, off comes one side of the disk).
2) a "semi-aero" rim profile gives you a surface below the braking surface on which to adhere the covering. A box rim won't give you that; an aero rim will have either too much surface behind the covering or too much surface above the covering (resulting in perhaps a less-than-aero profile).
I'm redoing my Power Tap wheel (on a Mavic Open Pro rim) in the next week or so to match my incoming P2K. I've purchased some LustreCoat paint that I hope matches the blue of the P2K, to make what I hope is an interesting pattern on the covering.
I note that Monokote is 26" wide, which is enough to cover the whole wheel in one piece. I will also try to do this without cutting a pie-slice out.
Ken Lehner
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Ken Lehner
"We are on our last bag of Life" - the wife
jhc
Feb 27, 04 14:55
Post #16 of 16 (109 views)
Re: DIY disc/How important is hub choice? [klehner]
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Would 36 spokes be unecessary? (dead weight?)
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