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Old 02-01-09, 05:11 PM   #1
tgrssn
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Surly Dingle + 130mm Surly Fixed Hub...

I asked this question in the fixed forum but I figured I'd post it here too in case one of you can give me a better answer...

What is the chainline(s) for this combo? Surly told me it would be 45 inner 50 outer. I mated a 113mm Truvativ square taper BB to a Sugino RD crank and the chainline I'm getting is. I thought the chainline would be about 50 outer but after measuring it seems like it's actually 47.5 on the outer chainring which should mean that the chain runs inboard. It doesn't though. It actually (looks) like it runs outboard towards the crank.

Wtf? Can anybody help?
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Old 02-02-09, 10:01 AM   #2
Sturmcrow
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Looks can be deceiving, especially with the slanted chainstays underneath. You could always try to measure the chainline on the rear yourself. It's not too tough, assuming that your frame is straight. Just subtract the distance from the inner face of the dropout to the cog from 65 (half of 130).
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Old 02-02-09, 11:10 AM   #3
tgrssn
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Quote:
Originally Posted by Sturmcrow View Post
Looks can be deceiving, especially with the slanted chainstays underneath. You could always try to measure the chainline on the rear yourself. It's not too tough, assuming that your frame is straight. Just subtract the distance from the inner face of the dropout to the cog from 65 (half of 130).
Do I measure from the center of the cog's teeth? to the inner face of the dropout? Thanks!!
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