Can Brake Mounting Flange be Replaced on Older Trailer
Updated 03/09/2020 | Published 03/07/2020 >
Products Featured in This Question
Question:
I purchased an older trailer today 1993 Mastertrack 16’ car hauler. The axles have a three or maybe just two? bolt pattern for the backing plate. All the brake assemblies I see on your site for 3.5k axles are four bolt patterns. Is there a way to make these work on mine?
asked by: Travis M
Expert Reply:
The only way to get brake assemblies for 3,500 lb axles to work on your trailer with what I assume are 3,500 lb axles is to have your flange professionally removed and a new one welded on, the Brake Mounting Flange for 2-3/8" Round Axle # 4-35.
This will require specific tools and a welder with experience doing this type of work. The easier way, and likely the less expensive option is going to simply be to replace your axle.
In order to choose the correct replacement axle for your trailer you will need to know the dimensions of your current axle's hub face to hub face and spring center to spring center; the other thing you need to know is the weight capacity of the axle you need, which should match or exceed the GVWR of your trailer. These can even come with hubs and brakes already on them.
For example the Dexter Trailer Axle with Electric Brakes # 35545E-ST-89 has a 3,500 lb capacity and measures 89 inches from hub face to hub face and 74 inches from spring center to spring center.
I have added a link to a video review and install of this axle as well as a link to our entire selection of axles for you to check out.

Product Page this Question was Asked From
Dexter Trailer Axle w/ Electric Brakes - 5 on 4-1/2 Bolt Pattern - 89" Long - 3,500 lbs
- Trailer Axles
- Leaf Spring Suspension
- Standard Grade
- Electric Brakes
- 3500 lbs
- 5 on 4-1/2 Inch
- 74 Inch Spring Center
- 89 Inch Hub Face
- No Drop or Lift
- Dexter
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: Electric Trailer Brake Assembly - 7" - Left Hand - 2,000 lbs
- Shop: Trailer Hub and Drum Assembly - 2K Axles - 7" Diameter - 5 on 4-1/2 - L44649 - Pre-Greased
- Shop: Loadstar ST175/80D13 Bias Trailer Tire with 13" Galvanized Wheel - 5 on 4-1/2 - Load Range D
- Shop: Brake Mounting Flange for 1-3/4" Round Trailer Axles - 2K
- Search Results: trailer hubs and drums
- Video: All You Need to Know About the Brake Mounting Flange for 1-3/4" Round Trailer Axles
- Video: Feature Review Electric Trailer Brake Assembly
- Video: Breaking Down the Trailer Hub and Drum Assembly
- Q&A: How To Choose The Correct Brake Mounting Flange For Your Trailer Axle
- Search Results: demco ez latch
- Search Results: demco trailer coupler
- Article: Parts Needed to Add Electric Drum Brakes to a Trailer
- Q&A: Bolt Patterns of Bolt-On Trailer Couplers for 3-Inch Trailer Tongues
- Q&A: Can Weld-On A-Frame Trailer Coupler be Replaced with a Bolt-On Coupler
- Video: Demco Trailer Coupler Feature Review
- Article: Most Popular Wheel Bearings
- Shop: Demco Channel Tongue Trailer Coupler - eZ-Latch - Silver - 2" Ball - Weld On - 10,000 lbs
- Shop: Fulton Fas-Lok Coupler - 2" Ball - 3" Channel - 6,000 lbs
- Shop: Demco Channel Tongue Trailer Coupler - eZ-Latch - Silver - 2" Ball - Bolt On - 10,000 lbs
- Shop: Trailer Hitch
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Search Results: trailer hitch
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Shop: Trailer Wiring
- Q&A: Lug Nut Torque Chart for Trailer Wheels
- Article: How to Measure Your Trailer Wheel Bolt Pattern
- Search Results: trailer wiring
- Shop: Brake Controller
- Article: Trailer Wiring Diagrams
- Q&A: How To Determine the Correct Size Lug Nuts For a Trailer