Recommended 26 Inch Leaf Springs for 3750 lb Tandem Axle Boat Trailer

Question:

Thank you for your response. The Manufacturer calls for 26” springs. The current springs are 26” when loaded and leave about 1 inch on each side to the center mount for the equalizer. (see pictures). My concern is that the new springs could flatten out to 28” under extreme conditions. That would move them 2 inches into a 1 inch space. What do you think? Thanks again.

asked by: Terry H

Helpful Expert Reply:

The 6-Leaf Double-Eye Spring for 4,500-lb Trailer Axles - 26" Long # e27SR will be the closest fit for your 3750 lb axle. Having leaf springs rated slightly higher is normal because you will be limited in capacity by the weakest component on your trailer and normally you want that to be your axle. These springs will not be too strong for that axle as to cause too firm a ride.

expert reply by: Jason S

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Terry H.

2/9/2018

Jason S.

2/9/2018

It is normal for the springs to become slightly wider when they are compressed. I appreciate the photos and suggest you go with the 3-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 25-1/4" Long # SP-220275. This will move your axles a little further from each other but not enough to cause any issues as long as you have the fender clearance. Each axle will move 3/8 inch to fit the new center of the spring seat location. This will fit your current equalizers and shackle straps, and they are rated for 4,000 lbs so your system won't be limited by your springs.