Hope RX4+ SL Flat Mount Brake Caliper (Sram DOT) Black HBSPC109N Hope

The Hope RX4+ SL Flatmount DOT brake caliper is a high-performance 4-piston hydraulic brake caliper designed to significantly improve the power and control of SRAM-compatible road and gravel braking systems. Thanks to its ultra-rigid monoblock design and lightweight construction, it delivers more powerful, consistent braking and a better feel at the lever, while maintaining excellent clearance with modern frames.

Precision-machined from a block of 2014 T6 aluminum and entirely manufactured in the UK, the RX4+ SL features a new piston cap design that reduces the overall width of the caliper to improve compatibility with the most demanding frames and forks.

Product highlights:

• Monoblock 4-piston design offering greater rigidity and power.
• Lightweight SL version for an excellent weight-to-performance ratio.
• New, more compact design improving compatibility with modern frames.
• Reduced friction and improved lever feel.
• Flat Mount front and rear mounting.
• Precision CNC machined from high-quality 2014 T6 aluminum.
• Available in all Hope anodized finishes.
• Simplified installation thanks to top-loading brake pads.

Key technologies:

4-Piston Monoblock The monoblock design, machined from a solid block, significantly improves the caliper’s rigidity. This architecture limits deformation under heavy load to deliver more powerful, consistent braking and better modulation.

RX4+ SL Lightweight Design
The SL version has been optimized to reduce weight without compromising braking power or reliability. It is an ideal solution for high-end road, gravel, and endurance bikes.

Frame Compatibility Optimization
The new bore plug design reduces the overall width of the caliper to ensure better clearance with modern carbon frames and forks with limited space.

Top-entry pad loading
The Top Entry Pad system allows for quick and easy pad replacement without removing the caliper from the bike.

Technical Specifications:

Disc compatibility:

SRAM lever compatibility:

Ideal use: The Hope RX4+ SL Flatmount DOT is designed for road, gravel, and endurance cyclists looking to improve the power, modulation, and consistency of their SRAM hydraulic brakes while enjoying a lightweight, rigid caliper that’s perfectly suited for modern bikes.

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