Shimano GRX RD-RX820 12-Speed Rear Derailleur Brand_Park Tool Maxxis typically uses ZK as

Maxxis typically uses ZK as a breaker layer

Trail-Tuned Geometry

the new Gravel Race is ready for your next race and all the gravel adventures between now and race day

When aerodynamic drag-to-weight and aerodynamic drag-to-depth ratios are considered

Shimano GRX RD-RX820 12-Speed Rear Derailleur Brand_Park Tool Maxxis typically uses ZK asSHIMANO 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