Hayes D-Series Disc Brake Rotor - 180mm 6-Bolt Silver CheckoutSpec= 11.4118.028.001 }Shimano GRX BR-RX820 Hydraulic Disc

}Shimano GRX BR-RX820 Hydraulic Disc Brake Caliper - Front Flat-Mount W/Bracket for 140/160mm Rotor (Assembled for 160mm)

Weight: 62g (32t)

Color Black Ring Position/Type Chain Retaining Single Ring Tooth Count 26 Round or Oval Round Drivetrain Speeds 9 Drivetrain Speeds 10 Drivetrain Speeds 11 Drivetrain Speeds 12 Chainring BCD Sram Direct Mount Offset 6 Chainline/Hub Compatibility 135/142 MTB Hubs Chainline/Hub Compatibility 150/157 DH Hubs Chainline/Hub Compatibility 170/177 Hubs Material Aluminum Defined Color Black Direct Mount Type Direct Mount SRAM

8 Bar Top Style Round Color Black Flare 16 Accessory Mount Diameter 31

Hayes D-Series Disc Brake Rotor - 180mm 6-Bolt Silver CheckoutSpec= 11.4118.028.001 }Shimano GRX BR-RX820 Hydraulic DiscHayes D Series Disc Brake Rotor 180mm 6 Bolt Silver. The D Series rotor was developed in conjunction with the new Dominion disc brake designed to provide consistent and reliable stopping power under all conditions. Proprietary friction surface optimized for use with Hayes T106 (Semi Met) or T100 (Sintered) pads to deliver fast consistent burnish predictable friction rate and consistency across temperature and speed conditions MRC (Modal Resonance