Originally Posted by
CoogansBluff
Cassette is fairly new, installed this year, if not mistaken. Chain wouldn't ordinarily need replacing yet.
I'm betting the chain has worn even more by now. How many miles have you put since you got the new cassette?
A few things came to mind:
- You might be favoring only 1 or few gears on the cassette. This practice has the opposite effect of accelerating wear on the whole drivetrain than if you're using the whole range of cassette cogs with terrifying regularity. This practice will also accelerate wear a lot faster on the chain and a worn chain would skip and jump between cogs, all sorts of stuff. If this is your case, you may be in need of replacing both cassette and chain soon.
- Chain is "flexing" a lot to the sides. A bit of sideways chain flex is needed but too much cause random jumps between cogs if chain line is at extreme positions (cross chaining) cause lethargic shifting. Cheap chains have tendency to flex a lot to the sides.
- Someone suggested bent hanger and this is definitely a possibility or you simply needed to tweak shifter indexing again.
- And finally, is this your bike mechanic?
