This rear brake backing plate is the exact aftermarket replacement designed for Honda TRX420, TRX500, and TRX520 models built between 2014 and 2021. It provides a solid foundation for the rear braking components, preserving proper shoe alignment and mounting geometry to maintain consistent, predictable braking force. Replacing a worn or bent backing plate helps prevent uneven shoe wear, brake drag, and reduced stopping power, especially on demanding trail rides and farm work.

As a purpose-built aftermarket part, it tackles common wear and damage that plague rear braking systems in rugged use. The plate resists distortion from heat and debris, helping keep the brake shoes aligned and the caliper action smooth. This replacement offers a cost-effective, reliable option for riders who need a durable, serviceable backing plate without compromising fitment or performance on the trail or in the field.

Comprehensive Vehicle Fitment

Product Specifications

OEM & Aftermarket Cross-Reference Information

What's Included

The kit includes the following component in the box:

• Rear Brake Backing Plate

Not included: armature, brake locking pins, and shoe springs.

Why Choose This Aftermarket Replacement?

• Direct-Fit Compatibility: Engineered to mount to the same rear brake housing as the OEM plate, preserving factory alignment and caliper reach.
• OEM Cross-Reference: Clear cross-reference to 43010-HR3-A20 ensures you’re swapping a proven, correct geometry part.
• Premium Materials: Heavy-duty steel construction designed to endure mud, water, and heat cycles common in off-road use.
• Rigorous Durability: Robust stamping and form retention help resist bending from rocks and debris encountered on trails and farms.
• Performance Restoration: Maintains proper shoe alignment and rotor clearance to restore consistent braking feel and response.
• Cost-Effective Reliability: A high-value option that delivers dependable braking performance without OEM price premiums.

Installation Notes:

• Verify compatibility: Confirm the model is one of the Honda TRX420, TRX500, or TRX520 from 2014-2021 and that the OEM reference is 43010-HR3-A20.
• Prepare mounting surface: Clean the rear brake housing mounting flange and remove any corrosion or burrs to ensure full plate seating.
• Check existing hardware: Inspect the mounting bolts and surrounding hardware; reuse only if flawless, otherwise replace with OEM-specified fasteners.
• Align carefully: Start all mounting holes by hand to ensure the backing plate sits flat and true before snugging bolts.
• Avoid debris contact: Clear dirt and debris from the shoe area and keep the backing plate free of oil or grease during installation.
• Post-install inspection: After installation, verify there’s no contact between the plate and moving brake components and test the brake lever for proper feel at low speed before riding.

Why Upgrade?

Running a worn or damaged rear backing plate can lead to misaligned brake shoes, uneven wear, and reduced braking efficiency, especially under muddy or heavy-use conditions. This aftermarket replacement restores correct geometry and support, delivering reliable rear stopping power and peace of mind for trail and farm use.