Hope RX4+ Disc Brake Caliper

Yes, the RX4+ is specifically engineered to work with Shimano hydraulic road and gravel systems. It is designed to integrate seamlessly with your existing Shimano levers and mineral oil lines.

This indicates the caliper is designed for a flat mount frame interface with a +20mm adapter built-in. It is intended for use with a 160mm rotor on a frame that would typically take a 140mm rotor, or a 180mm rotor on a frame that takes a 160mm rotor.

No, this specific version of the RX4+ is optimized exclusively for mineral oil systems. Using DOT fluid will damage the seals and compromise the braking performance.

Many riders find the RX4+ offers a more tactile, precise feel compared to stock options. Its rigid, CNC-machined construction minimizes flex, which often results in more consistent modulation and confidence on technical descents.

Absolutely. The RX4+ is built to handle the varied demands of both disciplines, providing the reliable, all-weather stopping power required for loose gravel descents and high-speed road riding alike.