How to Choose Axle and Tire Size for Homemade 5x8 Utility Trailer
Updated 10/27/2025 | Published 03/15/2025
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Question:
I’m building a 5 x8 utility trailer tandem axles what size axles length or width and tire size do I need
asked by: Tyrone
Expert Reply:
Hey Tyrone, thanks for reaching out!
You're most likely looking at something like the 89" Long Trailer Axle w/ Electric Brakes # e43SR, but there is a bit that goes into choosing the right axle so I'm attaching a video where Conner explains how to make sure you get the right dimensions. It will also help to know what weight rating you're wanting for the axles.
We also have the Timbren Kit # A35RS545E that just makes all of this easier, but it is a little more pricey than going with just a standard leaf spring setup.
If you can let me know the axle dimensions you're needing as well as the weight rating you're looking for I can make axle recommendations as well as what size wheels and tires would be best.
(click to enlarge)
Product Page this Question was Asked From
Trailer Axle w/ Electric Brakes - Easy Grease - 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
- etrailer
more information >
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Jon G.
10/27/2025
Hey Tyrone, what did you end up deciding for the axles and tires on your 5x8 trailer build? Your setup details could really help others trying to size their own tandem axles. Once you know your axle dimensions and weight rating, I can help narrow down the best match.