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Old 11-21-09, 10:43 AM   #1
vec
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i feel vibrations around my cranks when riding my fg

i recently cleaned up my chain, and now when i am riding i feel a vibration around the crank. if i get off and roll it around, i can feel it up to my saddle when it does it. it rolls smooth up to a point and then i will feel the vibration and then it will be smooth again. i also feel it when i am trackstanding. i think it is around the trackstanding position where the vibration is felt. my chainline is straight. everything is tight. i am not sure what the deal is.
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Old 11-21-09, 10:53 AM   #2
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That sounds kinda like your chain is to tight, and it's binding at one point. Move the axle forward a few mm and see if that helps
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Old 11-21-09, 01:38 PM   #3
zzyzx_xyzzy
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also, center the chainring -- http://www.sheldonbrown.com/fixed.html#tension
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Old 11-21-09, 03:31 PM   #4
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okay thanks, i will try those. checking to see if the chainring is centered should be the last resort, correct? is there a way to tell if the chainring is not centered or do i just need to follow the procedures from sheldon if i am still getting vibrations after slacking the chain but with it still tight and not drooping?
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Old 11-21-09, 05:29 PM   #5
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Quote:
Originally Posted by vec View Post
okay thanks, i will try those. checking to see if the chainring is centered should be the last resort, correct? is there a way to tell if the chainring is not centered or do i just need to follow the procedures from sheldon if i am still getting vibrations after slacking the chain but with it still tight and not drooping?
Centering the chainring is only relevant if you have extremely big differences in chain tension as it goes around. In which case it *might* help. Bottom line is, go see if your chain is binding at one point of the rotation and adjust your wheel position to eliminate it. If there are problems even after doing this then deal with it then.
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Old 11-21-09, 07:25 PM   #6
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could also be bottom bracket, but probably not.
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