The Hope RX4+ caliper builds on 25 years of experience designing and manufacturing hydraulic disc brakes, and transfers that knowledge into the world of road and cyclocross drop bar brakes. A precision CNC machined monobloc design results in a stiffer caliper to give unrivaled feel and modulation.Dot Fluid Calipers will have Bore Caps with a D. Monobloc design creates a stiffer caliper reducing the fuzzy lever feel and brake pad rub. Slimline 4 piston lightweight design. Top entry pad fitting. CNC machined from 2014 T6 aluminium. Calipers designed to fit 140, 160 & 180mm rotors. Item Specifications: Brake Caliper Type, Post Mount, Brake Lever Actuation, Hydraulic, Color, Black, Defined Color, Black, Hydraulic Fluid Type, DOT,.