Slipper Springs

Slipper Springs – Trailers and Caravans
Slipper Spring is the favoured spring for box trailers and many types of trailers requiring a spring.
Spring Specifications – Slipper Suspension

3 Leaf – 6mm – 45mm Wide – 765mm Long – 400kg Rating
4 Leaf – 6mm – 45mm Wide – 765mm Long – 450kg Rating
5 Leaf – 6mm – 45mm Wide – 765mm Long – 500kg Rating
6 Leaf – 6mm – 45mm Wide – 765mm Long – 600kg Rating
7 Leaf – 6mm – 45mm Wide – 765mm Long – 675kg Rating
9 Leaf – 6mm – 45mm Wide – 765mm Long – 800kg Rating

3 Leaf – 8mm – 45mm Wide – 710mm Long – 425kg Rating
4 Leaf – 8mm – 45mm Wide – 710mm Long – 550kg Rating
5 Leaf – 8mm – 45mm Wide – 710mm Long – 675kg Rating
6 Leaf – 8mm – 45mm Wide – 710mm Long – 750kg Rating
7 Leaf – 8mm – 45mm Wide – 710mm Long – 850kg Rating

6 Leaf – 60mm Wide – 765mm Long – 650kg Rating
7 Leaf – 60mm Wide – 765mm Long – 700kg Rating
9 Leaf – 60mm Wide – 765mm Long – 850kg Rating
10 Leaf – 60mm Wide – 765mm Long – 1000kg Rating

Boat and Box trailers use simple suspension systems in single axle and tandem axle configurations.

However, tandem axle suspension is not load sharing, and as a result, the spring must be 20% larger in load sharing.
Why?
Axle loadings for slipper suspension are limited to 120% of full load.

For example, with one wheel on the gutter, the other wheel is not touching the ground. As a result, tandem axles do not share the load.