Replacement Axle Options for 91-1/2" Axle with 4" Drop for Boat Trailer  

For your Tandem 8K axles with 2 inch slipper springs, I recommend the Tandem-Axle Trailer Hanger Kit for 2" Slipper Springs - 12" Long Equalizers #APT6SE. The hangers are to be welded to your trailer frame and the holes on the top of the…

The U-bolts of the U-Bolt Kit part #175211 are Grade 5. The torque specs for 9/16 diameter U-bolts like this is 65-95 ft lbs.

The spring hanger placement is going to be determined by your axle spacing. For example, if your axles are spaced 33 inches apart, as shown in the attached diagram, a 7K axle slipper spring, like #e74SR, requires a distance of 28-1/2 inches between…

Yes, you can mount two 6,000 lb capacity axles that use slipper springs in tandem on your trailer. What you'll need is a tandem axle slipper spring hanger kit like the part #APT6SE which is designed for 2 inch wide springs like what you have.…

For this combination, the distance between the front hanger and the center hanger should be 32 inches on center. The distance between the center hanger and the rear hanger will be 32 inches on center. This will put the axles 36-3/4 inches apart on…

The slipper spring hook of a slipper spring like part #e67SR attaches to the equalizer and the eye of the spring attaches to the hangers of Tandem-Axle trailer hanger kit part #APT6SE. I have attached a diagram of how slipper springs are setup. I…

The exact axle spacing will depend on the hanger kit and leaf springs you are using. For example, for a trailer with two 5,000 lb axles, we recommend using hanger kit, #APT6SE, and 4-Leaf Slipper Springs for 5,000 lb Axles, #SP-231275. The spring…

The slipper spring should sit on the hanger bolt somewhere in the center of the flat part so that it allows a bit of movement as the suspension articulates. The curved ends will generally going to keep the spring from moving too far if the suspension…

Typically lifting the trailer suspension is the best solution for situations like what you described. You can do this by moving the axles from being above the leaf springs to below the leaf springs. The diameter of your trailer axle will determine…

I was able to find more info on your slipper spring. Looks like you have a Dexter 5115 slipper spring that is 27-1/2 inches long and has a 4k capacity. I attached a picture that has all of the hanger spacing dimensions needed when installing this…

Since you have 8000-lb axles, we know that they will use slipper springs and I can narrow your options down to 2 different sized replacement springs for your Sanibel 3500 5th Wheel. In order to choose the right one you'll need to determine the…

With the 26-5/8 inch long leaf spring part #e74SR you referenced and the hanger kit part #APT6SE you also mentioned the dimensions in the chart you referenced would be correct to use. The distance between the front and center hanger should be 28-1/2…