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Respacing a rear wheel
Folks,
I have a question about converting a 130mm Ultegra hub for use on a bike that's spaced to 135 mm. I know you can do it by adding a 5mm spacer and redishing the wheel, but once that's done, how does the wheel compare to a wheel originally built on a 135 mm hub in terms of strength? Thanks, Trent |
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" I have a question about converting a 130mm Ultegra hub for use on a bike
that's spaced to 135 mm. I know you can do it by adding a 5mm spacer and redishing the wheel, but once that's done, how does the wheel compare to a wheel originally built on a 135 mm hub in terms of strength? If you add the 5mm spacer to the left side of the hub, the wheel will be stronger because the dish will be reduced and the spokes more evenly tensioned between the left and right sides of the wheel. -Bruce- |
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Bruce Lange wrote:
" I have a question about converting a 130mm Ultegra hub for use on a bike that's spaced to 135 mm. I know you can do it by adding a 5mm spacer and redishing the wheel, but once that's done, how does the wheel compare to a wheel originally built on a 135 mm hub in terms of strength? If you add the 5mm spacer to the left side of the hub, the wheel will be stronger because the dish will be reduced and the spokes more evenly tensioned between the left and right sides of the wheel. This begs the question: Why not make all hubs such that the dish is zero, right off the bat? Or why aren't all mountain hubs have the flange spacing of road hubs, so as to make it stronger? -- Phil, Squid-in-Training |
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On Fri, 17 Sep 2004 00:26:32 +0000, Phil, Squid-in-Training wrote:
If you add the 5mm spacer to the left side of the hub, the wheel will be stronger because the dish will be reduced and the spokes more evenly tensioned between the left and right sides of the wheel. Stronger, that is, than that 130mm wheel was originally. This begs the question: Why not make all hubs such that the dish is zero, right off the bat? Or why aren't all mountain hubs have the flange spacing of road hubs, so as to make it stronger? narrowing the flange spacing does not make a wheel stronger. But keep in mind that "stronger" is not really the only consideration. Strong enough, yes, but most of us do quite fine with 130mm spacing on 8-9-10 speed hubs. A 135mm hub will probably be stronger than a 130 stretched and re-spaced like this. But the 130 will be strong enough -- that is, if there is an axle for it that is long enough. -- David L. Johnson __o | As far as the laws of mathematics refer to reality, they are not _`\(,_ | certain, and as far as they are certain, they do not refer to (_)/ (_) | reality. -- Albert Einstein |
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Bruce Lange either asked or answered this question, attribution is hazy:
" I have a question about converting a 130mm Ultegra hub for use on a bike that's spaced to 135 mm. I know you can do it by adding a 5mm spacer and redishing the wheel, but once that's done, how does the wheel compare to a wheel originally built on a 135 mm hub in terms of strength? If you add the 5mm spacer to the left side of the hub, the wheel will be stronger because the dish will be reduced and the spokes more evenly tensioned between the left and right sides of the wheel. Phil, Squid-in-Training wrote: This begs the question: Why not make all hubs such that the dish is zero, right off the bat? Because if the flanges are too close together it makes the wheel weak laterally. Or why aren't all mountain hubs have the flange spacing of road hubs, so as to make it stronger? They generally do have the same flange spacing, which is part of the reason mountain-bike wheels are generally stronger than road-bike wheels. Sheldon "It's All About Triangles" Brown +---------------------------------------------------+ | Time shouldn't just pass; things should happen. | | --Harry Turtledove | +---------------------------------------------------+ Harris Cyclery, West Newton, Massachusetts Phone 617-244-9772 FAX 617-244-1041 http://harriscyclery.com Hard-to-find parts shipped Worldwide http://captainbike.com http://sheldonbrown.com |
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" I have a question about converting a 130mm Ultegra hub for use on
a bike that's spaced to 135 mm. I know you can do it by adding a 5mm spacer and redishing the wheel, but once that's done, how does the wheel compare to a wheel originally built on a 135 mm hub in terms of strength? Bruce Lange wrote: If you add the 5mm spacer to the left side of the hub, the wheel will be stronger because the dish will be reduced and the spokes more evenly tensioned between the left and right sides of the wheel. Phil, Squid-in-Training wrote: This begs the question: Why not make all hubs such that the dish is zero, right off the bat? Or why aren't all mountain hubs have the flange spacing of road hubs, so as to make it stronger? You need to look at a hub more closely. With a caliper. Neither dish isn't zero, road hubs aren't stronger. Heck, MTB and road hubs are often the same shell with a difference only of left side spacing. -- Andrew Muzi www.yellowjersey.org Open every day since 1 April, 1971 |
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trent gregory hill wrote:
I have a question about converting a 130mm Ultegra hub for use on a bike that's spaced to 135 mm. I know you can do it by adding a 5mm spacer and redishing the wheel, but once that's done, how does the wheel compare to a wheel originally built on a 135 mm hub in terms of strength? When you add a spacer it will be a 135mm hub. Not a copy. Not a replica. It will truly be a real 135mm hub in every way. -- Andrew Muzi www.yellowjersey.org Open every day since 1 April, 1971 |
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trent gregory hill wrote:
I have a question about converting a 130mm Ultegra hub for use on a bike that's spaced to 135 mm. I know you can do it by adding a 5mm spacer and redishing the wheel, but once that's done, how does the wheel compare to a wheel originally built on a 135 mm hub in terms of strength? A. M. Uzi shot back: When you add a spacer it will be a 135mm hub. Not a copy. Not a replica. It will truly be a real 135mm hub in every way. Clearly, Andy doesn't believe in homeopathy... Carapace Completed Umber Salem, Massaachusetts Bay Colony |
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Sheldon- A. M. Uzi shot back: BRBR
Funny...thanks for a little levity on this NG that is getting rather testy, with me participating...OT-Bush and his crashes, etc'. Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St. Boulder, CO, 80302 (303)440-3535 http://www.vecchios.com "Ruote convenzionali costruite eccezionalmente bene" |
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tghill- I have a question about converting a 130mm Ultegra hub for use on a
bike that's spaced to 135 mm. I know you can do it by adding a 5mm spacer and redishing the wheel, but once that's done, how does the wheel compare to a wheel originally built on a 135 mm hub in terms of strength? BRBR If you add the spacer to the left, and add tension to the left spokes to get dish right, probably the same, in terms of strength. Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St. Boulder, CO, 80302 (303)440-3535 http://www.vecchios.com "Ruote convenzionali costruite eccezionalmente bene" |
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