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When to replace your jockey wheels - avoid an expensive mechanical issue and improve your shifting | road.cc
So my GRX 400 rear derailleur jockey wheels became ninja stars and I cant get some new GRX specific ones. Will other shimano jockey wheels also work? : r/bikewrench
Shimano Grx Rd-Rx817 Tension And Guide Pulley Set - Jockey Wheels - Drivechain - Components | Pedal Power, Scotland's Bike Shop