Hope RX4+ SL Brake Caliper | Flat Mount | DOT - black

The Hope RX4+ SL Flat‑Mount brake caliper offers a four‑piston hydraulic disc system for road, cyclocross, and gravel bikes. Designed for 160 mm and 180 mm front rotors and 140 mm‑160 mm rear rotors, it uses DOT fluid and features a slim, monoblock aluminum construction for precise braking.

The Hope RX4+ SL brake caliper, released for the 2026 model year, provides a flat‑mount hydraulic disc solution compatible with a range of road, cyclocross, and all‑road/gravel bicycles. Its four‑piston design delivers consistent bite and modulation, while the monoblock milled aluminum body ensures stiffness and reduces flex. The caliper supports 160 mm and 180 mm front rotors and 140 mm‑160 mm rear rotors, making it suitable for a variety of setups. It is specified for DOT brake fluid, aligning with SRAM drop‑bar brake systems such as Red AXS, Force AXS, Rival AXS, and Apex. The top‑entry pad mounting simplifies maintenance, and the slim bore cap design improves frame compatibility. Overall, the RX4+ SL combines lightweight construction with reliable performance for demanding riding conditions.

• Flat‑mount hydraulic disc brake
• Four‑piston aluminum monoblock design
• Compatible with 160 mm‑180 mm front rotors and 140 mm‑160 mm rear rotors
• Uses DOT 4/5.1 brake fluid
• Top‑entry pad mounting for easy service