Description
The 8-6.5″ Bolt Circle 9/16″ Stud TruRyde® 8K Axle Self-Adjusting Electric Brake Kit (Part BK8K916) is a complete heavy-duty self-adjusting electric brake and hub/drum assembly designed for 8,000 lb. trailer axles. This kit delivers strong, reliable braking performance with the convenience of automatic adjustment.
Key Features
- Part Number: BK8K916
- Bolt Circle: 8 on 6.5″
- Wheel Studs: 9/16″-18 studs
- Capacity: 8,000 lb. trailer axles
- Hub/Drum: 12-1/4″ hub/drum with 8 studs on 6.5″ bolt circle
- Brakes: Pair of 12-1/4″ x 3-3/8″ Self-Adjusting Electric Brake Assemblies
- Bearings: 25580 inner and 02475 outer bearings
- Brand: TruRyde®
This kit includes a pair of 12-1/4″ hub/drums using 25580 inner and 02475 outer bearings, along with seals and oil caps. It also comes with a pair of 12-1/4″ x 3-3/8″ electric forward self-adjust brake assemblies (left and right) with 4-hole mounting, backing plates, and hardware. Designed for 8,000 lb. 2020+ Dexter, Lippert, and Rockwell axles with four-hole brake flanges.
All components are manufactured utilizing industry recognized materials in an ISO/TS-16949 registered facility. Magnets are tested 100% for pull force and conductivity. TruRyde® Part Number RVD-8K-865-916 is compatible with Dexter® Part Number 008-285-09.
Ideal for heavy-duty utility trailers, equipment haulers, cargo trailers, and other demanding 8,000 lb. applications requiring dependable self-adjusting electric brakes.
Questions about compatibility with your axle? Call our trailer experts at 1-800-866-3336.
Browse more trailer brakes and parts.
| Part No | Quantity | Description |
| RVD-8K-865-916 | 2 | Drum, 8K, 865, 9/16-18 Studs, Cupped & Studded |
| OS-2250UNI | 2 | Oil Seal 2.250 x 3 |
| 021-035-00 | 2 | Oil Cap |
| 010-045-00 | 2 | O-Ring for 8K Oil Cap 2 7/8″ |
| 046-032-00 | 2 | Rubber Plug for Oil Cap |
| L-25580 | 2 | Bearing Cone (25580) |
| L-02475 | 2 | Bearing Cone (02475) |
| BK-8KE-01 | 1 | 12-1/4″ x 3-3/8″ Self-Adjusting, 8K Electric LH |
| BK-8KE-02 | 1 | 12-1/4″ x 3-3/8 Self-Adjusting, 8K Electric RH |
| 12NFN | 8 | 1/2″-20 Hex Nut |
| 12LW | 8 | 1/2″ Lock Washer |
| 007-251-00 | 8 | Bolt Hex Head 1/2-20 x 1.50 |
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:
| Brand | QAI Certified | Notes |
|---|---|---|
| TruRyde® | Yes | Most models are QAI Certified — Southwest Wheel’s primary brake line |
| Lippert® | Yes | Many electric and hydraulic brake assemblies are QAI Certified |
| UFP | Yes | Especially strong on hydraulic disc brake systems |
| Kodiak | Yes (Select Models) | Many disc brake kits carry QAI certification |
| Dexter® | Limited / Not Commonly Advertised | Focuses on internal testing and FMVSS compliance |
| Generic / Chinese Brands | Very Rarely | Most low-cost imported brakes sold on marketplaces do not carry 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.
