Chain "catching" in Low gear rear de. (Shimano 105)

by seabass89   January 14, 2012  

Hey peeps..

From having looked through a myriad of youtube videos on gear set-ups that I could see that the shop where I got my bike had set it up completely wrong. In fact, it was all over the place.

I've fixed the front de. so that the chain never rubs, and shifts smoothly and crisply.

The rear mech shifts flawlessly too, but for some reason (which - I can't figure out, a bit noob - sorry) the chain is "catching" when it is in the lowest gear (big cog) when I spin the pedals the right way, and if I spin the pedals backwards it actually hops down 1 or 2 cogs by itself.

Without saying more, is anyone skilled enough to know exactly whats wrong, or should I post a video?

6 user comments

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sounds like you might have to wind the low adjustment screw out half a turn to allow the chain to seat properly on the big cog.

Dave Atkinson's picture

posted by Dave Atkinson [7468 posts]
14th January 2012 - 14:47

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Yeah, I was messing with that for awhile Dave, and it did help a little..

Found out in the end though and I am too embarrassed to say what it is..

No however, the chain jumps off the big cog when I shift from small to big in the front.. Taking it back to the store.. Should have been sorted out there

seabass89's picture

posted by seabass89 [235 posts]
14th January 2012 - 23:05

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Quote:
Found out in the end though and I am too embarrassed to say what it is..

come on, spill the beans Big Grin

Dave Atkinson's picture

posted by Dave Atkinson [7468 posts]
14th January 2012 - 23:12

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Yeah, we'll not slag you. Remember - one big happy family here Wink

giff77's picture

posted by giff77 [1062 posts]
15th January 2012 - 20:55

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Be honest, you can tell us if it is really a Campag mech. Don't be ashamed.

Downhill bikes don't make you cool.

www.beestoncc.co.uk

charliemac74's picture

posted by charliemac74 [170 posts]
15th January 2012 - 21:11

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I was in the high cog in the front Drooling

Doing a neat cross-over..

seabass89's picture

posted by seabass89 [235 posts]
15th January 2012 - 22:46

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