Hope RX4+ Disc Brake Caliper

The RX4+ is designed to work with most major hydraulic road and gravel systems, but compatibility depends on your specific lever brand. It is crucial to verify that you are purchasing the correct version for your specific lever manufacturer, such as Shimano or SRAM, as the internal piston sizing differs.

This specific model is designed for use with DOT hydraulic fluid. Ensure your current braking system is also compatible with DOT fluid, as mixing fluids can damage the seals and compromise performance.

No, this caliper is strictly for flat-mount frames and forks. If your bike uses a post-mount system, you will need a different caliper model or a specific adapter, though adapters are not always compatible with every frame geometry.

The RX4+ is machined from a single piece of billet aluminum, which generally offers greater rigidity and heat management compared to many stock calipers. This construction often results in a firmer lever feel and more consistent stopping power during long, technical descents.

This specific listing is for the front position. While the caliper body may look similar to the rear version, the mounting hardware and orientation are specific to the front fork interface.