How to Determine Replacement Hub/Drum and Brake Assembly for Trailer
Updated 09/08/2025 | Published 06/12/2025
Products Featured in This Question
Question:
How do I determine the correct drums and electronic brake for my trailer. Also are these the e brakes used with my truck controller.
asked by: Desi C
Expert Reply:
Hey Desi! What kind of trailer do you have? To find the right replacement you will need to identify your axles. The best way to do this is by checking your axle tag. For example, if you have a 3,500 lb axle the etrailer Electric Trailer Brakes # AKEBRK-35-SA you were looking at will fit. Assuming you need a 5 on 4-1/2 bolt pattern you can use the # AKHD-545-35-K for a hub and drum assembly.
If you have a different axle capacity, or it isn't clear based on the tag, feel free to add your axle tag information in the comments below and I'll help you find the right replacement parts.
(click to enlarge)
Product Page this Question was Asked From
etrailer Electric Trailer Brakes - Self-Adjusting - 10" - Left/Right Hand Assemblies - 3.5K
- Trailer Brakes
- Electric Drum Brakes
- Standard Grade
- Self Adjust
- 10 x 2-1/4 Inch Drum
- 3500 lbs Axle
- 13 Inch Wheel
- 14 Inch Wheel
- 15 Inch Wheel
- etrailer
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Q&A: How Much Does MORryde X-Factor Crossmember for Standard Frame Hangers Weigh
- Shop: MORryde X-Factor Crossmember for Standard Frame Hangers
- Q&A: Lookiing To Upgrade Axles On 2015 Keystone Cougar 33RBK
- Video: Review of etrailer Trailer Brakes - Electric Drum Brake Kit - AKEBRK-35-SA
- Video: MORryde X-Factor Crossmember for Standard Frame Hangers Feature Review
- Video: An In-Depth Look at the MORryde X-Factor Crossmember for Standard Frame Hangers
- Shop: Trailer Axle w/ Electric Brakes - Easy Grease - 6 on 5-1/2 - 86-1/2" Long - 6,000 lbs
- Video: Let’s Check Out the Easy Grease Trailer Hub and Drum Assembly for 3.5K Axles
- Shop: etrailer Electric Trailer Brakes - Self-Adjusting - 10" - Left/Right Hand Assemblies - 3.5K
- Shop: Easy Grease Trailer Hub and Drum Assembly for 3.5K Axles - 10" - 5 on 4-1/2 - Pre-Greased
- Shop: Trailer Hub and Drum Assembly - 3,500-lb Axles - 10" Diameter - 5 on 4-1/2 - Pre-Greased
- Video: Checking Out the MORryde X-Factor Crossmember for LRE, RE, or TRE Leaf Spring Suspension
- Shop: MORryde X-Factor Crossmember for LRE, RE, or TRE Leaf Spring Suspension
- Q&A: Recommended Electric-Over-Hydraulic Disc Brake Kit For A 2022 Grand Design Solitude 3740BH
- Article: Parts Needed to Add Electric Drum Brakes to a Trailer
- Article: Trailer Wiring Diagrams
- Article: Electric Trailer Brakes: How They Work & What to Buy
- Q&A: Comparing the eTrailer and Dexter Electric Trailer Brake Kits
- Article: How to Measure Your Trailer Wheel Bolt Pattern
- Q&A: What is a #84 Spindle and How Do I Know I Have One On My Trailer?
- Article: How to Adjust Your Trailer Brakes | The Ultimate Guide
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Q&A: How to Measure to Determine the Size Trailer Brakes Needed For Hydraulic Drum Replacement
- Q&A: Replacement Hub, Drum and Brake Assemblies for AL KO 3,500 lb Axle
Robin H.
9/8/2025
Hey Desi, did you have a chance to check your axle tag to determine the correct parts for your trailer? I'm here to help if you need any more assistance with finding the right replacement parts.