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Old 08-17-09, 09:16 AM   #1
invisiblehand
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several questions associated with a new wheelset

Hi,

I have a Vent Noir with first generation Dura Ace hubs laced to 27" rims that look similar to Mavic MA2s. The wheels appear to be in excellent mechanical shape; although definitely well used. Although suspect that everyone here will already know this, the hubs are freewheels and the rear drop outs at 120 mm.

I'm thinking that a second set of wheels for everyday use would be a good idea since the wheels are probably ~30 years old and I'd like to keep as much of the original bike in working order. My thought is to spread the rear drop outs to 123mm such that fitting both the original 120mm wheel and a new 126mm wheel could be done smoothly. It appears that the rear derailer has enough lateral movement to accommodate the slightly wider cassette in the rear.

Assuming that the above is not a wacky idea, the issue of building a 126mm OLD rear wheel is raised. I assume that if one looks hard enough, one can find an appropriate freehub -- might have to convert from ultraglide to hyperglide, but that is straightforward. But would it be worthwhile to convert a 130mm freehub to 126mm?

In an old thread people suggested removing a 4mm spacer on the nondrive side. But that would create more dish. Could one instead swap the 8/9/10 speed freehub body with a 7 speed and replace the axle to lose the 4mm? Would a modern Shimano hub have any advantages over an older 126mm hub?

Any comments or suggestions are appreciated. Thanks.
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Old 08-17-09, 10:18 AM   #2
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Hello does this bike have index shifting? if not I would look for some nice freewheel hubs and you can use any 6/7spd freewheel on this. btw how old is your current chain/freewheel? if your chain has alot of stretch and wore the cogs on the freewheel you may need 2 freewheels and chain. I think you most difficult part might be finding 27" rims you like at a price you wish to spend. there is another post on 27" wheels in the mechanic section and it looks like 27" are slim pickens (not the actor *giggle*)

I think removing a 4mm spacer from a cassette hub not only causes a dishing issue but you would have to cut that 4mm off the axle as well.

as for having the frame spread you only talking a few MM os difference and I think there should be enough flex to allow hte 126 wheel to be slipped into the dropouts.

OH is this an Austro Daimler? I just looked one up on line nice looking bike http://www.company7.com/bosendorfer/ADbicycle.html
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Last edited by Bianchigirll; 08-17-09 at 10:22 AM. Reason: add text/ question for orginal poster
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Old 08-17-09, 10:26 AM   #3
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I think I have an older Shimano Dura-Ace Freehub based wheel similar to what you're looking for ... It's tubular though.
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Old 08-17-09, 10:44 AM   #4
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Just find a frame builder to coldset it to 130. It won't hurt anything. I found it easier to shift more cogs with a friction setup. If you move the lever in small amounts it will drop to the gear you want. Some people find it finicky or annoying but I've always found it to be easy.

Peter White Cycles is selling Mavic Open Sport rims laced to Shimano 105 hubs for 300$ a pair. They are older 7 speed hubs.
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Old 08-17-09, 11:13 AM   #5
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The bike uses friction shifting. It is an AD Vent Noir. It can accommodate 700c wheels so no point, IMO, in sticking with 27" other than the minor inconvenience of having to adjust the brakes when switching wheels.

Thanks for the offer ... but by my taste: tubular = yuck!

Hey ... I'll take a peek at Peter White's site. Thanks! BTW, how would respacing affect using the old wheels?
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Old 08-17-09, 01:34 PM   #6
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it would not affect them any differently than usiong the wider wheels. you just need to kind of squeeze everything together when you mount the old ones.
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Old 08-17-09, 02:41 PM   #7
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Quote:
Originally Posted by SoreFeet View Post
Just find a frame builder to coldset it to 130. It won't hurt anything.
Quote:
Originally Posted by Bianchigirll View Post
it would not affect them any differently than usiong the wider wheels. you just need to kind of squeeze everything together when you mount the old ones.
Is this what you meant SoreFeet?

My first inclination is that it would do weirdo things to the chainline and -- mind you, I have zero experience with this -- it doesn't sound like such a great idea to clamp down the dropout a cm with a the quick release.
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Old 08-17-09, 02:46 PM   #8
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At least with a 126mm wheel in a 130mm dropout, the response in the Bike Mechanics forums agrees with the sentiments below.

Downgrade: 7 speed wheel in 8/9 speed (130mm) dropout
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