Parts Needed to Upgrade From 3,500 lb Axle to Get 8 on 6-1/2 Hubs
Updated 01/05/2026 | Published 01/04/2026
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Question:
I have a car hauler with 3500 axles and 5 lug 4.75. I want to replace axles with 8 lug 6.5 wheels. The hub face is 95, spring center is 80. Can you make me a shopping cart from your store for : 1 axle with 8x6.5 bolt idler hubs, 1 axle with brakes for 8x6.5 wheel, 4 sets of 3500 leaf springs 1.75 wide, about 26.5 eye to eye, 4 leafs, and equalizers, and hardware to bolt all to my trailer?
asked by: maurice r
Expert Reply:
Hey Maurice, welcome back! To accomplish this you will have to increase the axle capacity. You can use the following:
-Trailer Axle Beam with Easy Grease Spindles - 95" Long - 5,200 lbs # e63GR
-Easy Grease Trailer Hub and Drum Assembly for 5.2K - 7K Axles - 12" - 8 on 6.5 # AKHD-865-7-2-EZ-K
-Easy Grease Trailer Idler Hub Assembly for 7,000-lb E-Z Lube Axles - 8 on 6-1/2 # AKIHUB-865-7-2-EZ-K
-etrailer Electric Trailer Brakes - Self-Adjusting - 12" - Left/Right Hand - 5.2K to 7K # AKEBRK-7-SA
-U-Bolt Kit for Mounting 5,200-lb to 7,000-lb, Round Trailer Axles - 7" Long U-Bolts # APUBR-8
-4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 26" Long # e22YR
The 4k leaf springs are the closest we have to that measurement without going to a 27" # e97SR or 25-1/4" # DX23CR. You will have to measure your equalizers to find the correct replacement. 5-3/4" is pretty standard for your current axle size so if you find that is the length of the equalizers you can use the Suspension Kit for Tandem-Axle Trailers # AP233 which includes bolts and 2-1/4" long shackle straps.
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Product Page this Question was Asked From
Trailer Axle Beam with Easy Grease Spindles - 95" Long - 5,200 lbs
- Trailer Axles
- Leaf Spring Suspension
- Standard Grade
- No Hubs
- 5200 lbs
- Spindles Only
- 80 Inch Spring Center
- 95 Inch Hub Face
- No Drop or Lift
- etrailer
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Maurice R.
1/5/2026
Thank you for answering! How are equalizers measured? From outer center of hole to middle center of hole is 4.75". from farthest center of hole to opposite center of hole is 7.75. I cannot asuume this is how it was from factory, because trailer is old and had multiple owners. I measured 26.5" eye to eye on leaf springs. Would it help if I say the mounts welded to the trailer for the leaf springs are 29.5 inches apart center to center, equal for the 3 mounts (tandem axle)?