Shimano GRX RD-RX820 Rear Derailleur - 12-Speed Direct Mount One Spec Shadow Plus Design 36t Max Low ModelNumber=21282 Defined Color Black PSI 58

Defined Color Black PSI 58 Weight 1090 TPI 60 Tire Type Tubeless Ready Clincher Tire Intended Use Mountain Color Black Tire Diameter 27

0 Color Blue Material Aluminum Defined Color Blue S

Color Black Width 52

Aluminum wheels are designed to withstand any abuse you can throw at them supported by a Reserve lifetime guarantee

Not compatible with Shimano 10-Speed Dyna-sys mountain bike drivetrains

Shimano GRX RD-RX820 Rear Derailleur - 12-Speed Direct Mount One Spec Shadow Plus Design 36t Max Low ModelNumber=21282 Defined Color Black PSI 58Shimano GRX RD RX820 Rear Derailleur 12 Speed Direct Mount One Spec Shadow Plus Design 36t Max Low. The Shimano RD RX820 rear derailleur is compatible with 11 34t and 11 36t 12 speed cassettes providing a wide gear range so you can spin a comfortable cadence no matter the terrain type. This rear derailleur also features an integrated chain stabilizer that delivers quieter shifting and more secure chain management during rough rides. The chain