Hope RX4+ SL Flat Mount Mineral Red Brake Caliper HBSPC105R Hope

The Hope RX4+ SL Flatmount MIN brake caliper is a high-performance 4-piston hydraulic brake caliper designed to optimize braking power, control, and consistency on road, gravel, and endurance bikes equipped with Shimano or Campagnolo groupsets. Thanks to its lightweight monoblock design and compact form factor, it delivers superior braking power while improving compatibility with modern frames and forks.

CNC-machined from a block of 2014 T6 aluminum and manufactured to Hope’s quality standards, the RX4+ SL features a new design that reduces the caliper’s lateral footprint. Its 4-piston design ensures more powerful and progressive braking than a traditional road caliper, while maintaining excellent lever feel.

Product highlights:

• Monoblock 4-piston design for increased braking power.
• SL version optimized for weight reduction.
• New, more compact design for improved compatibility with modern frames.
• Superior rigidity limits deformation under braking.
• Reduced vibration and unwanted friction, with improved lever feel.
• Flat Mount installation front and rear.
• Top-loading pads for simplified maintenance.
• Available in all Hope anodized finishes.

Key technologies:

RX4+ 4-Piston Monoblock
The CNC-machined monoblock construction improves the caliper’s structural rigidity. This design reduces flex under heavy load and delivers more powerful, precise, and consistent braking.

RX4+ SL Lightweight Design
The SL version was developed to deliver the performance of the RX4+ system in a lightweight configuration, ideal for high-end road and gravel bikes.

Optimized Compatibility
The new bore plug reduces the overall width of the caliper to improve its integration with modern carbon frames and the tightest mounting spaces.

Top Entry Pad System
Brake pads can be replaced directly from the top without removing the caliper, making maintenance easier.

Technical Specifications:

Disc compatibility:

Shimano compatibility:

Campagnolo compatibility:

Ideal use: The Hope RX4+ SL Flatmount MIN is designed for road, gravel, and endurance cyclists looking to increase the power and modulation of their Shimano or Campagnolo brakes while maintaining a lightweight, stiff, and perfectly integrated setup on modern bikes.

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