Shimano GRX RD-RX812 11-Speed Rear Derailleur Long Black pickuponly 2-piece ball and socket system

2-piece ball and socket system

all together at once

5 liters of space

Using a special design where the maximum number of balls are inserted into the bearing

Shimano GRX RD-RX812 11-Speed Rear Derailleur Long Black pickuponly 2-piece ball and socket systemWith 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