Bent rear derailleur arm

Noticed that using my suito, that my rear derailleur arm bent, which messed up capacity to shift to smaller ring.

Has any else had this problem?


If you clamp down too hard it can bend the rear hanger but generally won’t affect front shifting

For reference, do you have a similar problem if you use the same bike with a regular wheel?

It may well be a bent derailleur hanger (especially if you have problems on the trainer and with a wheel), and can best be addressed by a mechanic with a derailleur alignment gauge.

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I have ridden this bike strictly on the trainer for the past 6 months, so I doubt that it was happening off the trainer.
Even though I thought that I had the bike in a secure position, I wonder if climbing on and off may have caused the bike to shift slightly, putting pressure on the rear derailleur.

Getting a new rear derailleur arm installed and will need going forward to check alignment before stepping into bike.

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