Shimano GRX 1x Rear Derailleur (RD-RX812) BX PSI Can be installed with a

Can be installed with a single tool

The Plan B Micron carries the bare minimum spares — pack it right and you could probably squeeze your front door key in there too

The GX Eagle™ derailleur gets it done with an updated cage architecture that improves chain management

When developing the Terreno Wet tread

Shimano GRX 1x Rear Derailleur (RD-RX812) BX PSI Can be installed with aWith 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. Features SHIMANO SHADOW RD+ (11 speed) Adjustable chain stabilizer prevents chain slapping and drops Toggle