The PS18D Single Leaf Parabolic Trailer Spring is the highest-capacity spring in the PS13D/PS15D/PS18D parabolic range. Manufactured from a single tapered 18mm parabolic leaf, it measures 45mm wide and is rated at 1400kg per pair. Its lightweight single-leaf construction provides effective trailer suspension while the Dacromet finish improves corrosion resistance, making the PS18D particularly suitable for boat and marine trailer applications.
Trailer Springs
Single Leaf Parabolic Trailer Spring Dacromet – 1400kg Pair
SKU: V-92342
$92.40
Key benefits
Key Benefits
- Single-leaf parabolic spring
- Heavy-duty 1400kg capacity per pair
- Nominal 700kg per spring
- 18mm (0.71") maximum leaf thickness
- 45mm (1.77") spring width
- 755mm (29.72") A dimension
- 370mm (14.57") eye to centre bolt
- 150mm (5.91") free camber
- Progressive parabolic spring design
- No friction between multiple spring leaves
- Reduced weight compared with conventional multi-leaf packs
- Dacromet corrosion-resistant finish
- Particularly suitable for boat trailers and marine environments.
Advantages of the Parabolic Design
- The PS18D differs from a conventional multi-leaf spring because it uses one tapered load-carrying leaf rather than a stack of constant-thickness leaves.
- This provides several practical benefits
- Reduced suspension weight
- No friction between multiple leaves
- Progressive spring flex
- Fewer surfaces for moisture and debris to accumulate between
- Simplified visual inspection
- Strong load capacity from a compact spring design
Suitable Applications
- The PS18D is suitable for appropriately rated
- Boat trailers
- Marine trailers
- Box trailers
- Utility trailers
- Camper trailers
- General-purpose trailers
- Heavy-duty single-axle trailer suspension
- The Dacromet finish is particularly useful for trailers exposed to water and corrosive marine conditions.
Signs the Parabolic Spring Needs Replacing
- Inspect or replace the PS18D if you find
- Cracking or fractures in the spring leaf
- Permanent sagging or flattening
- Loss of normal spring camber
- Deep corrosion or significant pitting
- Distortion around the spring eye
- Excessive eye-bush wear
- Damaged or displaced centre bolt
- Uneven trailer ride height
- Spring or axle misalignment
- Abnormal tyre wear associated with suspension alignment
- Visible deformation around the axle mounting area
- Because the PS18D is a single-leaf spring, cracking or significant structural damage to that leaf requires prompt replacement.
Shipping
Ships Australia-wide