Riyhch Electric Trailer Brake Magnet Kit 12-1/4" x 3-3/8" Set of 2 for 9-10K Axles, Corrosion-Resistant

Riyhch's 12-1/4" x 3-3/8" electric trailer brake magnet kit is a pair of direct-fit replacement magnets engineered for 9,000–10,000 lb axles and 12-1/4" x 3-3/8" electric drum brakes.

When your trailer's brakes feel weak or the magnets have worn down, these replacement magnets restore consistent electromagnetic engagement inside compatible electric drum brakes. Each set contains two magnets designed to match common replacement part numbers (including fits for 21026 and K71-376-00), built from corrosion-resistant materials to withstand road salt and moisture over time.

How do these magnets restore braking performance?

The magnets are the component that generates the magnetic field to pull the armature and apply the brake shoes to the drum. Replacing worn or pitted magnets ensures the actuator responds correctly when you apply the trailer brake, producing stronger, more predictable stopping force.

• Direct-fit dimensions: 12-1/4" x 3-3/8" to match original brake shoes and backing plates.
• Compatible with 9K–10K axle electric brakes for correct mechanical engagement.
• Replaces common OEM numbers like 21026 and K71-376-00 for straightforward upgrades.
• Corrosion-resistant construction preserves magnetic strength and appearance.

What should I check before buying replacement brake magnets?

Measure your brake drum and backing plate to confirm the 12-1/4" x 3-3/8" size and verify your axle class falls within the 9,000–10,000 lb range. Also compare the magnet shape and mounting hole locations to your existing parts to ensure a direct swap without modifications.

• Confirm axle rating: 9K–10K (9,000–10,000 lb) to match load capacity.
• Verify brake size: 12-1/4" diameter and 3-3/8" width of the drum/brake assembly.
• Cross-check part numbers like 21026 or K71-376-00 for compatibility.
• Inspect mounting holes and orientation before installation.

How long will these magnets last and resist corrosion?

Longevity depends on usage and environment, but these magnets are made from durable materials treated to resist rust and corrosion. Proper installation and routine brake system maintenance—cleaning, lubrication, and shoe inspection—help maximize service life.

• Corrosion-resistant finish to fight road salt and moisture exposure.
• Durable construction for repeated electromagnetic cycles under load.
• Regular brake inspections recommended to prevent premature wear.
• Replacement as a pair helps maintain balanced braking response across the axle.

Can I install these magnets myself or should I seek professional help?

A mechanically inclined DIYer with the right tools can replace brake magnets, but access to the backing plate and safe trailer support are essential. If you’re unsure about brake systems, wheel bearings, or torque specifications, professional installation reduces risk and ensures correct adjustment.

• Requires wheel and drum removal to access brake assembly and magnets.
• Proper jack stands and axle support are necessary for safe work.
• Follow brake adjustment specs after installing magnets for balanced braking.
• Choose a professional if unfamiliar with drum brake service procedures.

Who is this for? This Riyhch magnet kit is aimed at trailer owners, fleet managers, and repair shops servicing 9,000–10,000 lb axles with 12-1/4" x 3-3/8" electric drum brakes. It’s a practical replacement for worn magnets or for refurbishing brake assemblies during routine maintenance, ideal when you need a direct-fit solution that matches common OEM numbers like 21026 and K71-376-00. Please check your trailer model and brake dimensions carefully before purchase, and keep children away from brake components and tools.