R1R is the lightest brake on the market. Amazing power in a lightweight package, only 267 grams with 22mm pistons for the caliper, stainless steel hardware and kevlar hose.
When we designed the pull-style master cylinder, the idea was to keep the power of our radial master cylinder but allow the lever to be adjusted closer to the bar. This is the only master cylinder of its kind, creating a light lever action by reducing friction and wear for a better lever feel over the life of the brake.
The R1R features the same caliper as the R1 for confidence and reliability.