Description Overview Upgrade your trailer suspension with the AL‑KO Parabolic Slipper Spring (P/N 584527D). Featuring a single parabolic (tapered) leaf design, this spring has a full 1400 kg capacity per pair, fits standard AL‑KO eye‑to‑tail hanger systems, and comes pre-fitted with a ½″ nylon bush. The Dacromet coating provides exceptional corrosion resistance—ideal for marine and coastal use—while its modern design ensures a smoother ride, longer fatigue life, and reduced weight compared to traditional multi-leaf setups. ✅ Key Features Single parabolic flex-leaf design for smoother performance and lower weight Rated at 1400 kg per pair (approximately 700 kg per spring) Pre-installed ½″ nylon bush for direct eye‑to‑tail hanger fitment Dacromet zinc-alloy finish for superior rust resistance in saltwater or humid environments OEM AL‑KO durability and reliability across use cases (boat trailers, heavy light‑trailers)