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-   -   Jumpy Chain (https://www.bikeforums.net/singlespeed-fixed-gear/770101-jumpy-chain.html)

Whale 09-22-11 02:19 PM

Jumpy Chain
 
Single Speed, chain jumps off rear gear, other than the obvious about chain being loose, any thoughts on adjusting? Its a 54 - 16 ratio. - Ta.

prooftheory 09-22-11 02:21 PM

Is the chainline right?

Motopecane 09-22-11 02:24 PM


Originally Posted by prooftheory (Post 13264224)
Is the chainline right?

This.

rithem 09-22-11 02:27 PM

54X16 seems a bit of a jump ... may need more chain wrap on the rear cog. Have you considered perhaps dropping down up front a bit? Seems like a huge gear anyway. 1/8th or 3/32 DT?

Motopecane 09-22-11 02:33 PM

I didn't read the ridiculously high ratio before, that could definitely be the problem.

rithem 09-22-11 02:36 PM

my stab is 3/32"DT and flex in the front chainring is the culprit ...

EpicSchwinn 09-24-11 04:22 PM

Maybe poor chain line plus a stuck link somewhere?

evilcryalotmore 09-24-11 04:36 PM

Im using 52 x16 and with my chainline out it jumped. So it can be that factor.


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