5-4.5" Bolt Circle 3,500 lbs. TruRyde® Trailer Axle Self-Adjusting Electric Brake Kit - BK545ELEAUTO-IPS

The 5-4.5" Bolt Circle 3,500 lbs. TruRyde® Trailer Axle Self-Adjusting Electric Brake Kit (Part #BK545ELEAUTO-IPS) delivers reliable, low-maintenance braking performance for 3,500 lb. trailer axles. This complete self-adjusting kit includes pre-assembled electric brakes and matching hub/drum assemblies for easy installation and consistent stopping power.

Key Features

• Part Number: BK545ELEAUTO-IPS
• Brand: TruRyde®
• Axle Capacity: 3,500 lbs.
• Bolt Circle: 5 on 4.5"
• Brake Size: 10" x 2.25" Self-Adjusting Electric Drum Brakes
• Spindle: 84 Spindle
• Inner Bearing: L68149
• Outer Bearing: L44649
• Mounting: 4 Hole Brake Flange

Technical Specifications

• Pair of 10" TruRyde® hub/drum assemblies with 5 studs on 4.5" bolt circle using L68149 inner and L44649 outer bearing
• Contains inner bearings, outer bearings, grease seals, grease caps, ultra lube grease caps, spindle washers, spindle nuts, cotter pins, tang washers, and lug nuts (84 Spindle)
• Pair of 10" x 2.25" TruRyde® self-adjusting electric trailer brake assemblies with parts
• 4 Hole Mounting – works with Alko, Dexter, Quality, Lippert, and other popular trailer axle manufacturers
• Fits 3,500 lbs. trailer axles with four-hole brake flange
• Includes full mounting hardware
• Fully assembled backing plates with shoes, springs, and magnets attached (one left hand + one right hand)

The self-adjusting mechanism automatically maintains proper brake shoe clearance, reducing maintenance needs and ensuring consistent, reliable braking performance over time.

Questions about this TruRyde self-adjusting brake kit or compatibility? Call our trailer experts at 1-800-866-3336.

Browse more Trailer Electric Brake Kits.

QAI Certification Testing Standards for Trailer Brakes

QAI Laboratories is an independent, accredited third-party testing and certification organization. QAI certification provides assurance that trailer brakes have been rigorously tested to meet recognized safety and performance standards.

Primary Standards for Trailer Brakes

• CAN3-D313-M85 (R2012) — Canadian standard for Trailer Running Gear (axles, brakes, and suspension)
• CSA Z240 — Recreational Vehicles and Manufactured Housing standard
• FMVSS / CMVSS — Federal Motor Vehicle Safety Standards (U.S. and Canada) for braking performance
• UL Electrical Standards — Testing of brake magnets, wiring, and electrical components

What QAI Tests

• Braking performance and stopping power
• Electrical current draw and magnet strength
• Resistance to water, dust, heat, and corrosion
• Mechanical durability and long-term wear
• Self-adjusting mechanism performance (when applicable)
• Safety labeling and traceability

Trailer brakes that carry the QAI Certified mark (including many TruRyde® and Lippert® models) have been independently verified to meet these strict standards, giving you confidence in safety and reliability.

QAI Certified Trailer Brake Brands (Industry-Wide)

QAI Laboratories is a respected independent testing and certification organization. Below is the current status of major trailer brake brands regarding QAI certification:

Note: QAI certification is a strong indicator of independent safety and performance testing. Always verify current certification status on specific part numbers when safety is critical.