![Shimano-Groupe de vélo de route GRX, 1x11 vitesses, jas812, 170/172 T, 30 T, 32 T, 34 T, 40 T, 42T - AliExpress Shimano-Groupe de vélo de route GRX, 1x11 vitesses, jas812, 170/172 T, 30 T, 32 T, 34 T, 40 T, 42T - AliExpress](https://ae01.alicdn.com/kf/H6c4da22056244b3d91a92c6b162ac1aeN.jpg_640x640Q90.jpg_.webp)
Shimano-Groupe de vélo de route GRX, 1x11 vitesses, jas812, 170/172 T, 30 T, 32 T, 34 T, 40 T, 42T - AliExpress
![Shimano-Ensemble de groupe de vélo de route, Di2, GRX, jas815, 11 vitesses, 170/172mm, 175mm, 40 T, 42T - AliExpress Shimano-Ensemble de groupe de vélo de route, Di2, GRX, jas815, 11 vitesses, 170/172mm, 175mm, 40 T, 42T - AliExpress](https://ae01.alicdn.com/kf/S09f7d038e3a34d528b10c3364210ff72Z.jpg_640x640Q90.jpg_.webp)
Shimano-Ensemble de groupe de vélo de route, Di2, GRX, jas815, 11 vitesses, 170/172mm, 175mm, 40 T, 42T - AliExpress
![GRX 400 (10 Speed) x2. Looking to upgrade to GRX 400. Has anyone got experience of what the optimum cassette size to use in the rear? Looking to get a low bail GRX 400 (10 Speed) x2. Looking to upgrade to GRX 400. Has anyone got experience of what the optimum cassette size to use in the rear? Looking to get a low bail](https://preview.redd.it/rg0sapqcq5r81.jpg?width=640&crop=smart&auto=webp&s=086b30c283afe3b58cea05a48321ba9e3e079835)
GRX 400 (10 Speed) x2. Looking to upgrade to GRX 400. Has anyone got experience of what the optimum cassette size to use in the rear? Looking to get a low bail
![Shimano GRX-Ensemble de groupe de vélo de route, 11 vitesses, 1x11 vitesses, jas812, 170/172 T, 30 T, 32 T, 34 T, 40 T, 42T - AliExpress Shimano GRX-Ensemble de groupe de vélo de route, 11 vitesses, 1x11 vitesses, jas812, 170/172 T, 30 T, 32 T, 34 T, 40 T, 42T - AliExpress](https://ae01.alicdn.com/kf/Sa54afdf5f0e34799a7065a4e52c607c7y.jpg_640x640Q90.jpg_.webp)
Shimano GRX-Ensemble de groupe de vélo de route, 11 vitesses, 1x11 vitesses, jas812, 170/172 T, 30 T, 32 T, 34 T, 40 T, 42T - AliExpress
![Shimano – ensemble de vitesses pour vélo de route GRX RX600, 1x11 vitesses, 170/172.5/175mm, 30/32/34/40/42T Shimano – ensemble de vitesses pour vélo de route GRX RX600, 1x11 vitesses, 170/172.5/175mm, 30/32/34/40/42T](https://ae01.alicdn.com/kf/H1bde8140c4bc47f98eea3dba343e5767M.jpg_640x640q90.jpg)