Hope RX4+ Disc Brake Caliper - Rear Flat Mount Direct +20mm Mineral Oil Red. 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 aluminum offers 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"
TECH SPECS
Brake Lever Actuation HydraulicBrake Caliper Type Flat MountRotor Included NoBrake Position RearColor RedHydraulic Fluid Type Mineral OilDefined Color Red
QUALITY SERVICE
Just real riders who strive to provide the best customer service.
FREE SHIPPING
Most orders over $75 ship free anywhere within the lower 48 United States
RETURNS
Not happy with your order, just send it back to us for a refund or exchange.
Our Race Team Sponsors
Also Supported By
Our Race Team Sponsors
Also Supported By
Race Team
Racing is a huge part of the culture at Lenny’s Bike Shop, and the Lenny’s Race Team represents the shop on trails and racecourses throughout the region. Made up of passionate riders who love pushing their limits, the team competes in gravity and mountain bike events while proudly representing the Lenny’s community.
Why Shop with Lenny's?
At Lenny’s Bike Shop, cycling isn’t just a business — it’s a passion. As a locally owned, full-service bike shop, Lenny’s is dedicated to helping riders of every level enjoy the sport with the right bikes, gear, and expert support.
From high-quality bicycles and components to trusted service and advice, the team focuses on delivering products and support that help you ride more and ride better.
Whether you’re upgrading your bike, tuning up your ride, or just getting started, you’ll find knowledgeable staff, great brands, and a commitment to keeping the cycling community rolling.