Brembo Radial GP4-RX CNC 2-Piece Brake Caliper Kit 100mm – Street-Legal Racing Performance 220B01020

When braking performance is non-negotiable on both the road and the track, the Brembo GP4-RX CNC 2-piece radial brake caliper kit delivers race-derived stopping power with full TÜV and ABE type-approval — certified for a wide range of production supersport motorcycles. Built to the same exacting standards found in MotoGP pit lanes, this 100mm kit carries the credentials to match its capability.

Key Features

• TÜV and ABE (KBA) approval — fully road-legal on all compatible models, giving you race-grade braking with complete regulatory compliance.
• CNC-machined 2-piece bolted aluminium caliper body for maximum rigidity, dimensional accuracy and consistent pad contact under sustained hard braking.
• Nickel finish on the caliper body improves heat dissipation and provides long-term corrosion resistance alongside a purposeful, premium appearance.
• 4-piston design with 32 mm diameter pistons — dual-sealed for road use — delivering progressive, highly modulated braking feel from corner entry to trail-braking.
• Compatible with DOT 4 and DOT 5.1 brake fluid, maintaining flexibility for road and circuit use without requiring specialist fluid sourcing.
• Supplied as a complete kit including high-performance sintered brake pads (07BB3793 Sinter TT) — ready to install straight from the box.

Race Engineering for the Road

The GP4-RX is Brembo's answer to riders who refuse to compromise. The 2-piece bolted construction eliminates the flex that cast monoblock alternatives can introduce at high temperatures, while the CNC-machined surfaces ensure that pad-to-disc contact geometry is held to tight tolerances lap after lap. The nickel finish is not merely cosmetic — it acts as a thermal barrier that helps manage the extreme heat cycles generated during repeated hard stops, whether on a race circuit or a mountain road.

Each piston measures 32 mm in diameter and is equipped with dual sealing for road-optimised fluid retention and seal longevity. The 30 mm offset and 100 mm radial bolt spacing place this caliper directly in the sweet spot for most contemporary supersport platforms. The recommended brake disc thickness is approximately 35 mm wide with a maximum disc thickness of 6 mm (optimum 5.5 mm), compatible with original-fitment discs in most applications.

Approvals and Road-Legal Status

Unlike track-only race calipers, the Brembo GP4-RX 100mm kit holds TÜV certification and a KBA approval number, making it one of the few genuinely race-specification radial calipers that can be legally fitted and ridden on public roads in Germany and across much of Europe. For riders who take their bikes both to the circuit and on weekend road rides, this approval removes any ambiguity and avoids insurance complications.

Compatible Spare Parts and Accessories

• Short banjo bolt for bleed screw M6: part number 06GS2373
• Bleed screw M6: part number 06GS2360
• Brembo dust cap for bleed screw: part number 05150210
• Pad retaining spring plate: part number 120225579

Fitment and Compatibility

This kit is designed for supersport motorcycles fitted with 100mm radial caliper mounting and approximately 35mm wide brake discs. Confirmed compatible platforms include:

• Aprilia RSV4, RSV4 R, RSV4 RF, RSV4 RR, RSV4 1100, RSV4 1100 Factory, RS 660, RS 457
• BMW S1000RR, HP4, HP4R, M1000RR
• Ducati 848, 899, 959, 1199, 1199 S, 1199 R, 1299, 1299 S, Panigale V4, V4 S, V4 R
• Honda CBR 1000 RR, CBR 1000 RR-R, CBR 600 RR
• Kawasaki ZX-10R, ZX-10RR, ZX-6R, ZX-4RR, Ninja 400
• KTM RC 390, RC8 1190, 990 RC R
• MV Agusta F3, F4
• Suzuki GSX-R 600, GSX-R 750, GSX-R 1000
• Triumph Daytona 675, Daytona 675 R, Daytona 765, Daytona 765 Moto2, Street Triple 765 R, Street Triple 765 RS
• Yamaha R1, R1M, R3, R6, R7, R9
• Bimota KB998 Rimini
• CFMoto, QJMotor and other platforms with 100mm radial caliper spacing — verify fitment before ordering.

Specifications