Derailleur Wheels wear out?

[Bill]

This question has probably been asked before, can the wheel on a deariler wear out like the Cassette when a chain wears?

[Joe_W]

Since not as much force is applied on them, they are much less critical than cassette sprockets. They do wear out a bit but since they are a lot softer than the chain it will not increase chain wear when running a new chain on an old derailleur.

[Bill]

Ok that would make sense due not as much force are put on them while pedaling. the most force is between the crank all the way to the upper of the cassette.