At DMG Motorsports, we present the Brembo RCS 15mm Radial Brake Master Cylinder — a race-derived braking upgrade built for riders who demand more precision, power, and adjustability from their front brake system. Sized for supermoto, adventure, and small-to-mid displacement sportbikes running single rotor setups or aftermarket calipers with larger pistons, this 15mm piston master cylinder is engineered to sharpen lever feel and improve overall stopping performance over a stock unit.

Featuring Brembo's patented RCS (Ratio Click System), this master cylinder lets riders switch the lever ratio in seconds using just a screwdriver, dialing in either a sharper, more aggressive bite or a softer, more progressive feel to match track, street, or weather conditions. Built from forged aluminum alloy and CNC-machined to exacting tolerances, it uses the same piston, seal, and pushrod specifications found in MotoGP and World Superbike, delivering the linearity and modulation that Brembo's racing hardware is known for.

Features:

• 1mm larger 15mm piston that complements aftermarket Brembo calipers with larger pistons, guaranteeing better modulation, feel, and performance
• Top level response times and perfectly modulated braking in any conditions, with excellent linearity between lever force and braking response
• Equipped with the patented RCS system for adjustment of the lever's inter-axis — in just a few seconds, using a simple screwdriver, the brakes can be made more aggressive and responsive (20 mm) or softer and more adaptable (18 mm)
• Aluminum alloy master cylinder body obtained through forging and subsequently machined with numeric controlled machines
• All components, including the piston, seals, and pushrod, are the same as those used in MotoGP and WSBK
• In the event of a crash, the outer portion of the lever folds up and away to avoid damage
• Comes with a micro-switch kit to activate the brake light and a banjo bolt
• Designed for use on single rotor systems (Supermoto) or dual floating 4 piston calipers