Why Do Suspension Hanger Kits Have Different Height Hangers  

I went out to the warehouse and pulled wheel lock set #RG01-150. The overall internal depth of the nuts that thread onto the wheel studs is 1-1/4 inches including the threaded part. The threads make up 3/4 of an inch of that 1-1/4 inch overall…

The picture with the torn up bushing looks like the eye of your slipper spring. Is that correct? If so, it is coming undone and probably the reason you're having this problem. It should be enclosed and not look similar to the hook on the end of…

The only real difference between your current 3-leaf springs and the 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 27" Long #SP-210275 will be the thickness of the leaf spring stack. This will be 3/8" thicker when compared to what…

For your application I recommend using the 4-Leaf Slipper Spring w/ Hook End for 4,000-lb Trailer Axles #SP-230275. This measures 26-5/8" to the end of the spring but if you check out the attached photo you'll see that it will fit great with…

You want leaf spring shackles to be at a slight angle as that prevents the springs from flipping around to the other side of the equalizer over uneven terrain. I attached a picture that shows what the angle is typically like.

You need to use square U-Bolts with having a square axle tube. Trying to use round U-Bolts you risk damaging both the bolts and the axle as it creates pressure points rather than distributing the load across the surface. We have a few different size…

It really just depends on what you are looking to get out of the bushings. Bronze bushings, like part #K71-291-00, will last longer but are more noisy and it is recommended to use wet bolts like part #126B2 to keep them lubricated. Nylon bushings,…

The recommended clearance with leaf spring suspension on an unloaded trailer is between 2 - 2-1/2 inches. You should have sufficient clearance with your loaded trailer, as leaf springs only tend to deflect 1-1/2 inch when carrying a load.

The Redline Wheel Lock Set #RG01-150 are not coded like a door lock is. Essentially, these are unique lug nuts used to make it more difficult for a would-be thief to steal because most people are not going to be carrying around the special socket to…

The Wheel Lock Set for 1/2" Wheel Bolts (2 Locks, 1 Key) #RG01-150 are the traditional 1/2-20. The actual depth of the locking nut is 1-1/4 inches.

In regards to measuring shackle straps, you don't need to remove them to measure accurately. If they are still installed on the trailer simply measure from the center of each bolt head, the two most common are 2-1/4" part #TRSL225 and…

The thickness of the Shackle Strap #TRSL225 that you referenced 3/16 inches. The thickest shackle we offer in the length of 2-1/4 inches is the part #018-024-01 which is 1/2 inch thick. I know that sounds almost too thick to be true, but I've…