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Old 01-13-08, 10:23 PM   #1
wearyourtruth
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question about surly hubs

i'm pretty sure surly only makes fixed and/or free hubs, but if they don't that's what i'm referring to. my question is that do the various sizes (120, 130, 135) all have the same flange width and hub body or are they different for each size? for instance, with a change of axle and spacers, could you effectively change the hub from one size to another? i've dealt with both the 120 and 135, but never had them together to compare. thanks!
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Old 01-14-08, 07:38 AM   #2
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No. I was at a shop last week and I held a Surly track hub and a 135mm Surly singlespeed hub next to each other and both the flange width and chainline were not the same.

You could take a 120 mm hub and either change the axel or just cut off the ends and use a quick release. But then you would have a really messed up chainline unless you used really narrow cranks.
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Old 01-14-08, 09:31 AM   #3
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As above, I'm sure you can make a 120 hub into whatever you want, but you may have to dish it.
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Old 01-14-08, 11:37 AM   #4
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That is true. But then your flip flop hub will neither flip nor flop.
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Old 01-14-08, 02:40 PM   #5
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Originally Posted by wearyourtruth View Post
i'm pretty sure surly only makes fixed and/or free hubs, but if they don't that's what i'm referring to. my question is that do the various sizes (120, 130, 135) all have the same flange width and hub body or are they different for each size? for instance, with a change of axle and spacers, could you effectively change the hub from one size to another? i've dealt with both the 120 and 135, but never had them together to compare. thanks!
The 120 mm hubs are made for 42 mm chainline, typical on track type equipment.

The 135 mm hubs are made for 52 mm chainline, so the chainwheel can clear the wide chainstays of a typical mountain bike frame.

See: http://sheldonbrown.com/chainline for details on this.

Sheldon "Actually, Surly Doesn't 'Make' Hubs At All, They're Made By Formula" Brown
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Old 01-15-08, 01:18 PM   #6
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Yeah, wish I'd bought Formula and saved myself the $100.
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Old 01-15-08, 02:15 PM   #7
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Now here's another question. On my Surly Crosscheck, A 118mm bottom bracket with SR Signature cranks gave me about 2 or 3 mm of clearance between my chainstays and the cranks.

However, that same combo on my fixed gear worked.

My question is this. Can two cranks have the same chainline, but different clearance between the crankarms and chainstay?
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Old 01-15-08, 02:22 PM   #8
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My question is this. Can two cranks have the same chainline, but different clearance between the crankarms and chainstay?
Most definitely......and even more critical when using track specific cranks.
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