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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 10-18-12, 04:28 PM   #1
wmgreene85
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Chain clicking and vibrating

Hello all,

I have a tedious problem that I need some help with. I am experiencing a clicking vibration in my chain/crankset. I understand this sound has to do with my chainline and chain tension. The tighter the tension the more "violent" the "thumping" is. However, when I loosen the chain tension to a point where the sound stops, I feel my chain tension is too loose because I have spots where the chain wiggle is over 1 inch. My chainring not bent. I am using SRAM Omnium cranks/chainring/BB and an IZUMI chain.

Is it possible I was running my chain too tight and stretched my chain out? Would replacing the chain fix this issue?

Any help would be appreciated. I have not ridden more than 200 miles on this bike.
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Old 10-18-12, 04:31 PM   #2
mtbikerinpa
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Most often that is caused by a stretched/worn chain. Check the pins with it tensioned by taking a ruler and measuring 12 pins. If the 12th pin deviates significantly(1/8) from the inch mark then replace the chain. If that is the cause it is due to the stretched pin relationship hitting the tooth too high.
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Old 10-18-12, 04:38 PM   #3
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Did you build this bike 200 miles ago with all new parts? Chain, chainring, and cog? Or was something used before?

Chain should not be worn out in 200 miles unless something is seriously wrong..
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Old 10-18-12, 05:33 PM   #4
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yes all new parts, and the 12-link pin length is dead on 1 foot. i am going to double check my chainring. Recently, a door was opened right as I rode by and hit my pedal. Maybe my cranks or chainring were bent a little. However, I have had them checked and there seemed to be zero damage.
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