Overview
This genuine AL‑KO Parabolic Slipper Spring (P/N 584525D) is a single-leaf tapered spring engineered for smoother trailer suspension performance. Its Dacromet zinc-alloy coating ensures excellent marine-grade corrosion resistance while providing a total 1,000 kg load capacity per pair (around 500 kg per spring). Supplied with a ½″ nylon bush, this spring is ideal for boat trailers and coastal-use trailers.
Built for longevity and comfort, the parabolic design offers reduced weight and improved fatigue life compared to traditional multi-leaf setups.
✅ Key Features
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Parabolic single-leaf design reduces weight while maintaining strength
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Rated at 1,000 kg per pair for reliable trailer suspension
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Dacromet coating for best-in-class corrosion protection in saltwater environments
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Pre-fitted ½″ nylon bush for precise hanger alignment and smoother movement
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Compatible with AL‑KO eye-to-tail hanger systems
📐 Specifications
| Feature | Specification |
|---|---|
| Part Number | 584525D |
| Spring Type | Parabolic single slipper leaf |
| Eye-to-Tail Length | ~755 mm |
| Width | 45 mm |
| Thickness (centre to tails) | ~15 mm tapering to ~9 mm |
| Load Capacity | 500 kg per spring (1,000 kg per pair) |
| Bush | Nylon bush, ½″ ID × 7/8″ OD |
| Corrosion Protection | Dacromet zinc-alloy finish |
| Mounting Style | AL‑KO compatible eye-to-slipper setup |
Shipping is calculated at checkout based on your location.