TSPA carries a range of 45mm wide eye to slipper trailer springs. When replacing a spring, do not select it by the number of leaves alone.
Check the spring width, spring design, leaf thickness, number of leaves, spring length and load rating before ordering. Springs that look similar can have different dimensions and capacities.
These Eye to Slipper spring ranges are 45mm wide.
TSPA carries conventional multi-leaf springs with 6mm and 8mm thick leaves, plus single-leaf parabolic springs.
Measure from the centre of the eye bush to the end of the spring. Do not assume similar-looking springs are the same length.
Compare the required capacity with the rating per spring shown for the selected spring.
The Eye to Slipper Springs 45mm category contains several different spring families. Their dimensions, construction and ratings are not necessarily interchangeable.
Width: 45mm
Leaf thickness: 6mm
Length: 765mm from the centre of the eye bush to the end of the spring
Available in 3, 4, 5, 6, 7 and 9 leaf configurations.
Width: 45mm
Leaf thickness: 8mm
Length: 765mm from the centre of the eye bush to the end of the spring
Available in multiple leaf counts with ratings up to 800kg per spring.
Width: 45mm
Leaf thickness: 8mm
Length: 710mm from the centre of the eye bush to the end of the spring
These are shorter than the 765mm black 8mm springs and have their own load ratings.
Width: 45mm
Design: One-piece single-leaf parabolic spring
Length: 755mm from the centre of the eye bush to the end of the spring
Parabolic slipper springs are used mainly on trailers where a low trailer height is important, such as scissor-lift trailers.
These springs are 765mm long when measured from the centre of the eye bush to the end of the spring.
| Spring | Leaf Thickness | Width | Length | Rating Per Spring |
|---|---|---|---|---|
| 3 Leaf | 6mm | 45mm | 765mm | 300kg |
| 4 Leaf | 6mm | 45mm | 765mm | 400kg |
| 5 Leaf | 6mm | 45mm | 765mm | 450kg |
| 6 Leaf | 6mm | 45mm | 765mm | 550kg |
| 7 Leaf | 6mm | 45mm | 765mm | 675kg |
| 9 Leaf | 6mm | 45mm | 765mm | 700kg |
The black 8mm springs and Dacromet 8mm springs are different lengths and have different ratings. Match the dimensions and capacity of the spring required rather than selecting by leaf count alone.
| Spring | Finish | Width | Length | Rating Per Spring |
|---|---|---|---|---|
| 3 Leaf × 8mm | Black | 45mm | 765mm | 400kg |
| 3 Leaf × 8mm | Dacromet | 45mm | 710mm | 350kg |
| 4 Leaf × 8mm | Black | 45mm | 765mm | 500kg |
| 4 Leaf × 8mm | Dacromet | 45mm | 710mm | 425kg |
| 5 Leaf × 8mm | Black | 45mm | 765mm | 600kg |
| 5 Leaf × 8mm | Dacromet | 45mm | 710mm | 550kg |
| 6 Leaf × 8mm | Black | 45mm | 765mm | 700kg |
| 6 Leaf × 8mm | Dacromet | 45mm | 710mm | 650kg |
| 7 Leaf × 8mm | Black | 45mm | 765mm | 800kg |
Important: The 765mm black 8mm springs and 710mm Dacromet 8mm springs should not be treated as the same spring simply because they have the same number of leaves. Always check the spring length and load rating.
Unlike conventional multi-leaf slipper springs, these parabolic springs use a single-leaf design.
All three parabolic springs are 45mm wide and 755mm long, measured from the centre of the eye bush to the end of the spring.
| Spring | Design | Width | Length | Rating Per Spring |
|---|---|---|---|---|
| 13mm Parabolic | Single Leaf | 45mm | 755mm | 300kg |
| 15mm Parabolic | Single Leaf | 45mm | 755mm | 500kg |
| 18mm Parabolic | Single Leaf | 45mm | 755mm | 700kg |
Where are parabolic slipper springs commonly used?
Their single-leaf design is commonly used on trailers where keeping the trailer height low is important, such as scissor-lift trailers.
Select the spring using its dimensions and load rating rather than comparing the number of leaves with a conventional multi-leaf slipper spring.
Check the spring width, spring design, leaf thickness, number of leaves, eye-to-end measurement and rating per spring. If you're still unsure, contact the TSPA team before ordering.
