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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 10-16-06, 02:12 PM   #1
surreal
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question re: theoretical strength of a wheel

ok, all other things being equal, what'd be stronger: a rear SS/FG wheel with a 130mm hub, or the same built up with a 135mm hub? i'm thinking of building a cross check with a flip/flop, and the things are spaced 132.5. which hub will be stronger in the long run?

thanks,
-rob
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Old 10-16-06, 02:14 PM   #2
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the strength difference would only come into play if you knew the distance between flanges. It's going to be negligible, but a wider base of a triangle leads to a stronger shape.
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Old 10-16-06, 02:21 PM   #3
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Assuming the flanges and bearings are the same on both, the shorter axle would be stronger.
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Old 10-16-06, 02:29 PM   #4
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ah-ha. 2 different opinions here, then. let's make it easier. velocity aeroheads, wheelsmith 14/15 butted spokes (of appropriate length for each application), surly new hubs, fixed/free, in either 130 or 135mm versions. what's stronger?
tia,
-rob
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Old 10-16-06, 02:29 PM   #5
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Originally Posted by lyledriver
Assuming the flanges and bearings are the same on both, the shorter axle would be stronger.
except axle failure is rare. How well the rim stays true is a better measure and the 135(assuming the flanges are set wider) will put up with more abuse and stay true.
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Old 10-16-06, 02:32 PM   #6
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Originally Posted by surreal
ah-ha. 2 different opinions here, then. let's make it easier. velocity aeroheads, wheelsmith 14/15 butted spokes (of appropriate length for each application), surly new hubs, fixed/free, in either 130 or 135mm versions. what's stronger?
tia,
-rob
It looks like surly makes a 135 and a 120 version. If the 130 is a spaced out 120 it would be weaker if it is a spaced down 135 there would be no meaningful difference.

(38.4 ctf on the 135 and 30.1 on the 120)
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Old 10-16-06, 06:48 PM   #7
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i think surly stopped making the 130mm fix/free version, based on what i see on their website. actually, i think they stopped making all the 130mm versions, but they used to make them, and i can still get them thru the shop/qbp. i'm leaning towards the 135mm version either way right now, tho, as i think it might be more versatile for application in future projects, feel me?
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