Brembo Racing GP4-RR Monoblock Brake Caliper Kit 100mm XB9L2A0

When lap times are measured in tenths and braking consistency is the difference between a podium and a pit wall visit, the Brembo GP4-RR Monoblock Brake Caliper Kit is the hardware that professional riders and serious track-day competitors trust. Engineered exclusively for racing use, this 100mm kit pairs a rigidly machined monoblock aluminium body with four titanium pistons to deliver the kind of fade-free, perfectly progressive feel that no road-spec caliper can match.

Key Features

• Four titanium pistons in a staggered 32 mm / 36 mm configuration for powerful, linear braking force throughout the full lever travel
• Monoblock aluminium construction — milled from a single billet and hard-anodised — eliminates caliper flex under extreme braking loads
• Optimised thermal management channels heat away from the pistons and fluid, dramatically reducing fade during long, heavy braking zones
• Compatible with both DOT 4 and DOT 5.1 brake fluid, giving teams flexibility when bleeding at the circuit
• 30 mm offset and 100 mm fork-mount bolt spacing covers a wide spread of European and Japanese supersport platforms
• Maximum disc thickness of 7.25 mm keeps the kit compatible with the majority of racing-spec brake discs

Track-Focused Engineering

The GP4-RR designation puts this caliper firmly in Brembo's competition hierarchy. The monoblock body is not simply stiffer than a two-piece unit — it is a fundamentally different structural approach that removes the bolted joint at the highest stress point of the caliper, translating directly into more consistent lever feel and greater rider confidence at the limit. The hard-anodised finish protects the aluminium from the combined assault of brake dust, heat cycles and the aggressive cleaning chemicals used in a race paddock environment.

Titanium Pistons

Titanium's low thermal conductivity means significantly less heat migration from the disc and pad compound into the brake fluid compared with steel or aluminium pistons. For racing applications this is not a marginal gain — it is a primary safeguard against vapour lock during sustained high-speed braking. The 32/36 mm stagger produces a progressive bite characteristic that experienced riders can modulate with precision, even mid-corner.

Fitment and Compatibility

This kit is designed for forks with a 100 mm bolt spacing and fits a broad range of European and Japanese supersport machines, including:

• Aprilia RSV4, RSV4 R, RSV4 RR, RSV4 RF, RSV4 1100, RSV4 1100 Factory, RS 660
• Ducati Panigale 848, 899, 959, 1199, 1199 S, 1199 R, 1299, 1299 S
• BMW S1000RR, HP4, HP4R, M1000RR
• KTM RC8 1190, 1290 Super Duke R, RC 390
• Kawasaki ZX-10R, ZX-10RR (from 2016 onward)
• Honda CBR 1000 RR-R SC82 (2020 onward), CBR 1000 RR, CBR 600 RR
• Yamaha R1, R1M, R6, R7
• Triumph Daytona 675, Daytona 675 R, Daytona 765, Street Triple 765 R, Street Triple 765 RS
• MV Agusta F3, F4
• Suzuki GSX-R 600, GSX-R 750, GSX-R 1000

Always verify fork bolt spacing before fitting. This caliper kit is supplied without brake pads — select a pad compound suited to your specific disc and riding conditions separately.

Replacement Parts and Accessories

• Bleed nipple: part number 05281233
• Brembo protective cap for bleed nipple: part number 05150220

Racing and track-day use only. This product carries no road-use approval and must not be fitted to vehicles used on public roads.

Specifications