Shimano GRX RD-RX812 11-Speed Rear Derailleur Long Black Compatio_Enriched maximizing EFFICIENCY in the weakest

maximizing EFFICIENCY in the weakest part of the pedal stroke

traction and puncture resistance

Looking for a tire that's more aggressive than the mixte-tread GravelKing

Orange Fluo

6mm stem clamp

Shimano GRX RD-RX812 11-Speed Rear Derailleur Long Black Compatio_Enriched maximizing EFFICIENCY in the weakestWith an integrated chain stabilizer mechanism, the SHIMANO GRX derailleur provides a quieter experience and shifting security and precision on mixed terrain. For rides on smooth surfaces, the derailleur features and ON OFF switch for the chain tensioner. The RD RX812 rear derailleur is compatible with mtb cassettes with a 42T low sprocket max. Silent and uninterrupted rear shifting on rough terrain Adjustable chain stabilizer prevents chain slapping