Last month 2nd gear was bent outward on my cassette and ripped apart my chain. I can see how this can happen, high torque in the big ring. I have replaced the drivetrain (new 10spd cassette, new chain, new rings) Now I am noticing some bent teeth on the new cassette. It is mostly in ninth gear and it is bent out. I am can not figure out how the teeth can bend out in this gear. Can the rear derailure apply enough pressure to bend a tooth or two if I am shifting under load? Or is something else going on?
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Thread: Bending Cogs