hey everyone i have a 27 speed road bike and i recently replaced the chain bc the previous one was old. only problem now is that when i put force on the pedals in some gears, the bike jerks i believe it is chain slipping. could this be caused by worn cassette? any insight would be appreciated
by Tentacles__
6 Comments
This happened to me and the solution was to adjust the cable for gear shifting cuz it was a little loose after the repair, have you tried that?
You should include a picture of the entire drivetrain, so we can rule out causes for the chain slipping. It could be lots of things including
– improperly indexed rear derailleur
– worn chainring or cassette
– chain routed incorrectly
– inappropriate chain length/tension
From the picture, I see no reason to believe the cassette needs to be replaced. It sounds like you’re describing chain skip. This is caused by improperly adjusted derailleurs; likely the rear derailleur.
A less likely, but not impossible cause is an improperly sized or installed chain. If the chain is Shimano brand, make sure the stamped logo in the links is facing out. If you used a quick link, please sure a picture of the chain where the quick link is installed. If you have the packaging for the chain, please share a picture of that as well. Place the bike in the largest gear on the front and largest in the rear and share a picture of the side of the bike showing the full length of the chain stretched out in this position so we can check your chain length.
That usually means the cassette is worn, likely because the chain was left to get too worn out and it took the cassette with it. New chain causing slipping is the classic symptom. It doesn’t look too bad in the photo but it’s not always visually obvious.
Cassette looks dirty but fine. Probably need to index your gears. Search “index gears (whatever make and model your shifting components are)”
when you put on a new chain on a casette that’s not really circle shaped anymore, it cause jerking. for more visit r/bicyclingcirclejerk >!/s!<