Wilwood 1.25 Inch Square O-Ring Brake Caliper Rebuild Kit

Wilwood 1.25 Inch Square O-Ring Brake Caliper Rebuild Kit

Restore your Wilwood GP300/310 caliper to like-new sealing performance with a factory-specified rebuild kit. Replacing worn or degraded O-rings at service intervals prevents fluid leaks, maintains pedal feel, and extends the working life of your caliper without the cost of full replacement.

Key Features

• Square O-ring kit for 1.25-inch piston Wilwood GP300/310 motorcycle brake calipers
• Factory-specified rubber compounds maintain correct sealing under brake fluid and heat exposure
• Restores proper pedal feel and prevents fluid bypass caused by worn caliper seals
• Complete kit with all seals required for a full caliper rebuild
• Cost-effective alternative to full caliper replacement at scheduled service intervals

Technical Specifications

• Piston Diameter: 1.25 inches
• Seal Type: Square O-ring
• Compatible Calipers: Wilwood GP300, GP310

Fitment Notes

• Designed for Wilwood GP300 and GP310 motorcycle brake calipers with 1.25-inch pistons
• Confirm piston diameter matches before ordering – other piston sizes require different rebuild kits
• Replace O-rings at recommended service intervals or whenever brake fluid leakage is detected