RCB S3 SERIES BRAKE CALIPER – R15 V3 V4 R15M MT15 XSR FRONT – AEROX V2 NVX V2 NMAX REAR

RCB S3 Series Brake Caliper is a high-performance, dual-piston hydraulic upgrade precision-engineered for specific high-performance Yamaha motorcycle and scooter platforms. Built to deliver race-grade stopping power, this caliper serves as a direct-fit Front Caliper upgrade for the Yamaha R15 (V3/V4), R15M, MT15, and XSR155, as well as a direct Rear Caliper upgrade for the Yamaha NMAX and Aerox V2/NVX V2 (equipped with rear disc brake assemblies).

By utilizing an advanced Forged Monoblock body, the S3 Series completely eliminates the structural body flex common with multi-piece stock calipers, providing a firm, responsive lever feel and highly predictable braking control.

Key Features

• Forged Monoblock Architecture: Fully sculpted from a single piece of compressed high-tensile alloy matrix. Eliminating joining bolts prevents structural body expansion under extreme hydraulic line pressure, resulting in a firm, zero-sponginess brake lever feel.

• 25mm Dual-Piston Clamping System: Outfitted with twin 25mm high-flow pistons. This dual-piston configuration doubles the surface area of hydraulic fluid contact, distributing clamping force evenly across the brake pad face to eliminate uneven pad wear and maximize deceleration bite.

• Reinforced Structural Heat Dissipation: Designed with a low-profile, aerodynamically ribbed caliper body that acts as an integrated heat sink, rapidly shedding thermal buildup under aggressive, high-speed braking conditions to prevent fluid boiling and brake fade.

• Anodized Weather Protection Coating: Coated in a deep, premium anodized layer that protects the alloy core against harsh road salts, grit, and corrosive DOT racing fluids.

• Plug-and-Play Bracket Alignment: Each kit ships with a model-specific bracket engineered to align the dual pistons perfectly with your factory rotor disc diameter, removing the need for custom fabrication or machining.

Technical Specifications

Model-Specific Application Layout

Because this universal-series caliper caters to two distinct wheel layouts across the Yamaha family, ensure correct model positioning during installation:

• Front Wheel Mounting: Direct-fit upgrade for Yamaha R15 V3/V4, R15M, MT15, and XSR155. Upgrading the front single-pot factory unit to the S3 dual-piston system sharpens initial front wheel bite, giving sport riders more trail-braking control into corners.

• Rear Wheel Mounting: Direct-fit upgrade for Yamaha NMAX and Aerox V2 / NVX V2 (disc variants). Upgrading the rear caliper balances hydraulic lever pressure across your handlebars, ensuring stable rear tracking and seamless integration with factory anti-lock braking systems (ABS).