Shimano GRX FC-RX820-2 Chainring - 31t, Inner Ring, 80 BCD, For 2x 12-Speed, Black knee-leg-protection-sets Shimano GRX ST-RX815 Di2 Hydraulic

Shimano GRX ST-RX815 Di2 Hydraulic Brake/Shift Lever

Designed to bring everything you need for long rides without weighing you down

Chain Tugs keep the hub in place when used with horizontal dropouts

ONLY Compatible with Tiagra 4700 when using Tanpan 11 and corresponding 11-speed derailleur

Compression molded neoprene cuff

Shimano GRX FC-RX820-2 Chainring - 31t, Inner Ring, 80 BCD, For 2x 12-Speed, Black knee-leg-protection-sets Shimano GRX ST-RX815 Di2 HydraulicThese Shimano GRX RX820 2 anodized aluminum chainrings are for specifically designed for use with GRX FC RX820 2 2x 12 speed cranksets. Aluminum 31t inner chainring is lightweight and feature a hard anodized finish for added durability 4 Bolt Asymmetric 80 BCD Designed for use with 48t outer chainring (sold separately) Item Specifications Chainring BCD 80 Color Black Defined Color Black Drivetrain Speeds 12 Material Aluminum Number of Bolt Holes 4