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 Tiagra 4700/GRX 400 Groupset 4pcs 1x10 speed SH Cassette 11-42T Flat bar | eBay
Shimano GRX : 3 nouveaux groupes pour le gravel ⋆ Vojo