Replacing Slipper Springs on Boat Trailer for 3,500 lb Axle

Question

Question:

Replacing my slipper springs on boat trailer. I have a new 3500 pound axle. My current springs are 3 leaf 1 3/4 in wide, flat slipper. Off the trailer the eye to end is 28 inches,arch height is about 3 1/4 or so. Hanger distance on trailer is 27 inches straight line measure from eye to center is 13 1/2 in, curved measure is 14 1/2. Looking for at least or close to 3000 lb total on springs. Suggestions? Thanks, Chuck

asked by: Chuck C

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Expert Reply:

Hey Chuck, thanks for all of the dimensions you mentioned from your current springs. Based on that the best replacement option we have would be the part # e89SR which is for a 3,700 lb axle, is 1-3/4 inches wide, and overall is 30 inches. Your hanger distance of 27 inches would be perfect for this as well.

expert reply by: Jameson C

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Spring Dimensions
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Answer 1

Hey Steven, the closest thing we have would be the part #e49SR which has a 1,450 lb capacity per spring and overall is 30 inches long. The width is 1-3/4 inches as well. Is the 26.5 inch you need the overall length or from the eye center to where the…

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Answer 2

The leaf springs should be rated to match the axle on the trailer. Spring #e27SR is rated for 2,250 pounds per spring so it fits 4,500 pound axles. These springs would be overkill for a boat weighing up to 1,900 pounds and it would be a very stiff…

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Answer 3

Hey Kevin, welcome back. The CE Smith boat trailer item #CE48810 has a 1.98" inner hub diameter. You'll want the etrailer Bearing Protectors w/ Covers for 1.98" Hub Bore item #e99005. The etrailer item #e99005 are sold as a pair, will…

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Answer 4

Yes, the end of a slipper spring like the #e49SR will be very close to the hanger bolt in the unloaded position. There is no exact distance or placement, but it needs to allow for full suspension travel once installed. If the hanger is near the end…

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Answer 5

To properly measure your leaf springs you'll want to lift the trailer by the frame to take the weight off of the suspension and then measure from the center of the eyelet straight across the spring to the end of the slipper (pictured below). From…

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Answer 6

Our trailer leaf springs are rated for dynamic axle load. Which means the capacity listed but in use on the highway under normal circumstances. Since your trailer is 2,200 lbs loaded you want to go for a spring capacity 2,200 lbs or slightly higher.…

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Answer 7

I have a replacement option for you, but the only slipper spring we offer that is 1-3/4" wide and is 26-1/4" long is the 4-Leaf Slipper Spring w/ Open Eye End for 4,300-lb Trailer Axles - 26-1/4" Long #e33SR. Since you mentioned that…

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Answer 8

What happens to slipper springs is that over time they elongate and flatten out, particularly if your springs are considerably older. The most important measurement you mentioned was the 26 inches from the center of the spring eye to the end of the…

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Answer 9

Nope, there is not any type of plastic wear bad to go between the 1-3/4" wide 3-Leaf Slipper Spring w/ Flat End for 2,900-lb Trailer Axles - 30" Long #e49SR and trailer frame.

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Answer 10

Hey Jarrod, thanks for reaching out! I believe what you're looking for is the 30" Long 3-Leaf Slipper Spring w/ Flat End for 2,900-lb Trailer Axles #e49SR, although this may be a bit longer than what you currently have. If you take the…

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Answer 11

If the shackles aren't angled slightly you run the risk of the equalizers angling and having the shackles on the wrong side of the springs. 28 inch leaf springs are hard to come by so your best solution will be to either go with replacement…

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Answer 12

Yes, you could use leaf springs for a 4,000 lb axle, like part #e57SR (rated for 2,000 lbs each), with a 3,500 lb axle but it will make your ride a bit more stiff. The only times that a leaf spring would become damaged is if it is overloaded or has a…

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Replacing Slipper Springs on Boat Trailer for 3,500 lb Axle

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