Chain pops off going up steep stuff
05-31-10, 07:24 PM
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Chain pops off going up steep stuff
So I was mtn biking, and when i would go up a steep ass bit of ground, the chain would make a popping sound and pop off the smallest chainring. Did it a couple of times at the same spot. I recently got a new chain. I dont know if that has anything to do with it.
05-31-10, 07:27 PM
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Check for a bent tooth on the inner ring. A botched shift on low gear can often bend teeth and cause shifting problems or chain suck problems. It's probably not related to the new chain.
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05-31-10, 08:22 PM
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Just checked the gear and all the teeth look fine except two of them that are opposite each other have no tops. Don't know if that is normal or not.
05-31-10, 08:45 PM
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I got the chain replaced before it got to stretched out. Bike shop said it was within limits to not need new cogs. And it doesn't skip under load except on super steep stuff in the smallest chainring.
05-31-10, 09:16 PM
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05-31-10, 09:39 PM
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Cogs (aka cassette gears) can skip with a new chain and old cogs. Chainwheels (aka crank gears) usually don't skip with a new chain.
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Stuart Black
Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
06-02-10, 11:49 PM
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Ok. The cogs are fine. It just jumps of the smallest chainwheel on steep stuff. Do I need to check for stiff links in the chain? And how?
06-03-10, 07:58 AM
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While you are doing this check, watch the chain as it passes over the small ring in front. The ring should be very straight. If you see a wobble, that is likely your culprit. You may also have the low limit on the derailer set too far inboard so that the derailer can nudge it off the ring as the frame flexes during hard efforts.
If all else fails, you can add a chain watcher to your bike. They look like this
Not real elegant but it does work.
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Stuart Black
Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
Stuart Black
Plan Epsilon Around Lake Michigan in the era of Covid
Old School…When It Wasn’t Ancient bikepacking
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
