Are they interchangeable between speeds? Bent one in an M780 10 speed mech so could I take one out of a trashed 11 speed XT mech? Otherwise can anyone point me online to the correct replacement?

I’d like to know this also, have some jockey wheels out of a 9 speed deore mech and have a 10 speed mech which needs new jockey wheels.

Won’t it depend on the number of teeth on the jockey wheels ?. If they are the same i’d imagine it won’t be a problem.

I have been replacing 7 & 8 speed with 9 speed.
7 & 8 speed have 10T, 9speed have 11T number of teeth isn’t an issue.
The width is different sowmetimes, but as long as you replace both wheels
and have the right length screws it doesn’t seem a problem.

Edit sorry wrong thread. Nothing to see here.