Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
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Originally Posted by Big Ry
i bought a 2010 gary fisher mamba back in august and within a couple weeks the chain started slipping. when i pedal hard (even sitting down) it slipps a couple teeth. i took it back to the shop and the guy adjusted something that affects how much of the chain is touching the rear gears at any given time. it worked ok for like a day then started again. ive tried adjusting it myself, but if i adjust it too much, it wont go into some gears, but if i losen it it goes back to slipping. what can i do?
It could simply be a worn chain or cassette, but that seems doubtful given it's age. Just in case though, start by measuring the chain for wear (stretch). If you don't know how, search "Chain stretch" on the internet, and you'll find out about it and how to measure it.
It could also be a lubrication problem. A poorly lubricated chain is slightly stiffer than a well lubricated one and often doesn't properly engage, especially on the smaller sprockets.
Other than that, there are a number of other causes, but we'd need more info to help you. Does it slip on all cogs, or only certain ones? Is it the same regardless of which chainring you're using? Are you sure it's slipping on the cassette and not the chainring? How old is the bike, not in months but in miles?
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