Hope

RX4+ SL Post Mount SRAM Disc Brake

Hope RX4+ SL Post Mount SRAM Disc Brake Caliper is a compact, 4‑piston DOT-fluid caliper designed for riders who want higher braking authority and more consistent modulation from SRAM-compatible hydraulic systems. The refreshed RX4+ SL keeps Hope’s stiff, precision-machined architecture, then adds practical refinements—narrower overall width for better frame clearance and a cleaner bleed interface for faster, less messy service.

5 details that make it a smarter performance upgrade

1. CNC-machined monobloc stiffness - A rigid one-piece caliper body sharpens lever feel and helps minimize pad rub caused by flex under load
2. Narrower bore cap profile - Updated cap shape (based on Hope GR4/TR4 packaging) reduces caliper width for improved compatibility with tight frame and fork clearances
3. RX2-style bleed nipple - Revised bleed hardware is designed to make bleeding simpler and cleaner during routine maintenance
4. 2014‑T6 aluminum construction - High-strength alloy keeps durability high while controlling weight versus bulkier caliper bodies
5. Service- and setup-friendly design - Fully serviceable internals plus top-entry pad fitting for quick pad swaps; supports common 140/160/180mm rotor configurations with the appropriate adapters