Hope RX4 Disc Brake Caliper - Flat Mount Front 20mm Mineral Oil Type Purple. The Hope RX4 mineral oil type 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.

Monobloc design creates a stiffer caliper reducing the fuzzy lever feel and brake pad rub

Slimline 4 piston lightweight design provides reliable and powerful braking

CNC machined from high quality 2014-T6 aluminium provide high strength with the benefit of weight savings

Fully servicable design for an extended life

Top entry pad fitting make removal or installation simple and fast

Versatile design fits 140 160 & 180mm rotors

Mineral Oil Caliper will have Bore Caps with an M