Shimano GRX RD-RX820 12-Speed Rear Derailleur Brand_Park Tool Trail-Tuned Geometry

Trail-Tuned Geometry

integrated T25 hardware with rounded heads prevents injury

The uninterrupted shifting experience of the ULTEGRA R8100 12-speed cassette range lets you climb

Super Sticky Kush Star Fade

Maxxis typically uses ZK as a breaker layer

Shimano GRX RD-RX820 12-Speed Rear Derailleur Brand_Park Tool Trail-Tuned GeometrySHIMANO GRX Rear Derailleur SHIMANO SHADOW RD+ 12 speed RD RX820 NEW Enhanced chain security and quieter, more stable shifting for gravel riding The RD RX820 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. The SHIMANO GRX 12 speed rear derailleur also features an integrated chain stabilizer that delivers quieter shifting and more secure chain