GP4RX CNC Motorcycle Brake Caliper – Premium 7075 Aluminum with Nickel-Plated Finish

Upgrade your motorcycle's braking system with the GP4RX CNC Brake Caliper — engineered for riders who demand precision, durability, and consistent performance. Machined from aerospace-grade 7075 aluminum alloy and finished with a sleek nickel-plated surface, this caliper delivers race-inspired stopping power with a refined look that stands out on any build.

Why Choose the GP4RX Caliper?

7075 Aluminum Alloy Body: One of the strongest aluminum alloys available, providing a lightweight yet exceptionally rigid caliper body that resists flex under demanding braking conditions.
Nickel-Plated Surface Finish: Offers outstanding corrosion resistance and a polished, premium appearance that holds up to road grime, moisture, and heat cycles.
4 × 32mm CNC-Machined Pistons: Made from 6061 T6 homogeneous aluminum alloy with hard anodized (hard oxidation) surfaces for superior wear resistance and consistent brake force distribution.
Dual Sealing Ring Design: Each piston features a dual sealing ring for enhanced fluid retention, reduced leak risk, and long-lasting seal integrity.
High Heat-Resistant Rubber Seals: Engineered to withstand temperatures up to 230°C (446°F), ensuring seal performance remains stable even during aggressive or extended braking sessions.
100mm Installation Distance (Locking Point): Designed to fit a wide range of motorcycle applications with a standard 100mm mounting pitch.
10×1 Oil Inlet Thread: Industry-standard thread sizing for broad compatibility with aftermarket and OEM brake lines.
Includes Dual-Screw Exhaust Oil Pipe Fitting: Everything you need for a complete, no-fuss installation is included in the original packaging.

Full Specifications

Caliper Model	GP4RX
Caliper Material	7075 Aluminum Alloy
Surface Treatment	Nickel Plating
Piston Material	6061 Homogeneous T6 Aluminum Alloy (Hard Anodized)
Number of Pistons	4 × 32mm
Oil Inlet Thread Size	10 × 1
Installation Distance	100mm
Max Oil Seal Temperature	230°C (446°F)
Package Includes	1 × Caliper, Dual-Screw Exhaust Oil Pipe Fitting

Made in Mainland China.

Perfect For

Custom motorcycle builds and performance upgrades
Track-day and sport-touring applications
Riders seeking a high-spec aftermarket brake caliper with a 100mm mounting pitch
Café racer, streetfighter, and naked bike projects

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For guidance on motorcycle braking system maintenance and safety best practices, refer to the U.S. Consumer Product Safety Commission (CPSC) for consumer safety standards on powersport components.

Frequently Asked Questions

Q: What is the mounting distance (locking point) for the GP4RX brake caliper?

A: The GP4RX CNC brake caliper has an installation distance (locking point) of 100mm, making it compatible with a wide range of motorcycle fork and swingarm bracket configurations that use this standard pitch.

Q: What type of brake fluid is compatible with the GP4RX caliper's seals?

A: The caliper uses high heat-resistant rubber seals rated up to 230°C (446°F). It is compatible with standard DOT 4 and DOT 5.1 brake fluids commonly used in motorcycle braking systems. Always verify compatibility with your specific brake fluid before installation.

Q: Are the pistons easy to maintain or rebuild?

A: Yes. The four 32mm pistons are made from hard-anodized 6061 T6 aluminum alloy and feature a dual sealing ring design, which simplifies inspection and rebuilding. Replacement seals for standard 32mm pistons are widely available through aftermarket motorcycle parts suppliers.

Q: Is any hardware included with the caliper?

A: Yes. The GP4RX caliper ships in original packaging and includes a dual-screw exhaust oil pipe fitting, so you can begin your brake line setup right away without needing to source additional fittings separately.