Wilwood 120-10113-6-RD CPB Hydra-Mechanical Combination Parking Brake Caliper - Right Hand, Red, 41mm, .81in Disc

The Wilwood 120-10113-6-RD is a Combination Parking Brake (CPB) Hydra-Mechanical Caliper designed for rear axle disc brake conversions and upgrades. It combines hydraulic pressure for service braking with a cable-actuated mechanical locking mechanism for parking brake duty — eliminating the need for a separate drum-in-hat or internal shoe system. This is a right-hand, Position 6 caliper finished in red powdercoat, with a 41mm piston bore sized for .81-inch wide rotors.

Floating Single-Piston Design:

• Single-piston floating caliper mounts to a fixed radial mount bracket for maximum flexibility in installation positioning
• Floating mount maintains proper alignment when the mechanical parking brake lock engages and releases, preventing pad knock-back
• Self-centering design keeps the caliper aligned over the rotor as pads wear — ideal for c-clip rear axles with measurable lateral side play
• Compatible with rotor diameters from 11.00" to 13.00"
• Designed for .81" (13/16") wide rotors; a separate model is available for 1.00" wide rotors

Radial Mounting System:

• Radial mount design provides virtually unlimited bracket configuration options
• Axle flange brackets can be positioned at any height within the rotor diameter range or laterally relative to the hat and rotor offset
• Ideal for custom builds, drum-to-disc conversions, and performance rear brake upgrades

Cable-Actuated Parking Brake:

• Parking brake lock is actuated by a standard cable system using a 1/2" cable housing end on the stop bracket
• Accepts a 1/8" to 9/64" cable with a crimped or welded ball end
• Compatible with OE parking brake cables on select vehicles; aftermarket cable ends available for custom or non-OE installations
• Easily adaptable with aftermarket hand brake kit suppliers for full custom configurations

Key Specifications:

• Part Number: 120-10113-6-RD
• Caliper Type: CPB (Combination Parking Brake), Hydra-Mechanical
• Position: 6 — Right Hand (R/H)
• Piston Bore: 41mm
• Rotor Width: .81" (13/16")
• Compatible Rotor Diameter: 11.00" – 13.00"
• Mount Type: Radial, Floating
• Finish: Red Powdercoat

The Wilwood CPB caliper is the go-to solution for builders converting rear drums to discs or upgrading rear brake performance on vehicles where internal shoe parking brake systems are not practical. When paired with a properly sized rotor, it delivers balanced front-to-rear brake bias to complement front brake upgrades.