5-5.5" Bolt Circle 3,500 lbs. TruRyde® Trailer Axle Self-Adjusting Electric Brake Kit - BK555ELEAUTO-IPS

The 5-5.5" Bolt Circle 3,500 lbs. TruRyde® Trailer Axle Self-Adjusting Electric Brake Kit (Part #BK555ELEAUTO-IPS) is a complete, high-performance self-adjusting electric brake kit designed for 3,500 lb. trailer axles. The self-adjusting feature automatically maintains optimal brake clearance, delivering consistent braking performance with minimal maintenance.

Pair of 10" hub/drum 5 studs 5.5" 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" self-adjusting electric trailer brake assemblies with parts. 4 Hole Mounting. For Alko, Dexter, Quality, or other popular trailer axle manufacturers. Only works on 3,500 lbs. trailer axles with four-hole brake flange. Includes mounting hardware. These are fully assembled backing plates with shoes, springs, and magnets attached and ready to be mounted. The pair includes one left hand and one right hand brake assembly.

Key Features

• Part Number: BK555ELEAUTO-IPS
• Brand: TruRyde®
• Axle Capacity: 3,500 lbs.
• Bolt Circle: 5-5.5"
• Studs: 5 x 1/2"-20
• Brake Size: 10" x 2.25" Self-Adjusting Electric
• Hub/Drum: 10" with 5 on 5.5" bolt circle
• Bearings: L68149 Inner / L44649 Outer (84 Spindle)
• Mounting: 4-Hole Brake Flange
• Technology: Self-Adjusting (Auto-Adjust) Brakes
• Kit Contents: Pair of self-adjusting brake assemblies, pre-greased hub/drums, bearings, seals, hardware & lug nuts
• Compatibility: Alko, Dexter, Quality & other popular 3,500 lb. axles

Perfect for utility trailers, cargo trailers, boat trailers, and other single or tandem axle applications requiring dependable self-adjusting electric brakes with the popular 5-5.5" bolt circle.

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

Browse more Self-Adjusting 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.