Cyclo-cross transmission

38/40/42/44/46 teeth - Black or silver

Compatible with Shimano GRX 2x11-speed rear derailleur

For single chainring - Special Gravel - Shadow RD+ system

42-tooth chainring, 172.5mm cranks

11-speed - cyclo-cross and road

From 38 to 54 teeth

40-tooth single chainring - Special Gravel

Gravel Special - Single chainring - Hollowtech II

Single chainring - Flat Mount or Post Mount caliper

Compatible with Ultegra, Dura Ace 11v

Special Gravel - Cyclo-cross 11 speeds

11 speeds - Compatible with Rival 1 and Rival 22 - Flat Mount or Post Mount attachment