Shimano GRX RX820 48/31T 172.5mm 2x12v Complete Groupset Featuring proven hydraulic braking technology, the new Shimano 105 BR-R7170 2-piston calipers impress with the Shimano Flat-Mount system and its flat profile, ideal for road bikes. More compact and lighter than ever, the R7170 brakes offer wide brake pad spacing for easy wheel removal, quiet performance and, thanks to one-way bleeding, easy and thorough maintenance.
