A direct OEM-spec replacement slipper spring for 3,500 lb trailer axles. Heavy-duty steel construction, five-leaf design, and a proven Lippert fitment make this the go-to swap when your existing spring is cracked, sagging, or broken -- without the guesswork of sourcing aftermarket unknowns.
Leaf springs are one of the most load-critical components on any towable trailer. A worn or broken slipper spring causes uneven axle loading, tire wear, frame stress, and poor handling on the road. Replacing it with a properly rated, dimension-matched unit like the Lippert 710493 restores factory ride quality and weight distribution.
The slipper-style end (as opposed to a double-eye spring) allows the rear of the spring to slide freely in a shackle bracket, giving the suspension the articulation it needs under load without binding. This design is standard on the majority of single-axle travel trailers and fifth wheels using Lippert or equivalent axles.
Progressive five-leaf design distributes load across multiple layers, resisting set and fatigue better than fewer-leaf alternatives at this weight rating.
Matched to the most common single-axle RV trailer rating. Use on axles rated exactly 3,500 lb -- do not substitute for higher-rated axles.
Rear slipper rides in a fixed bracket, front eye mounts to hanger. Allows natural fore-aft flex under load without a second pivot pin to maintain or replace.
Black-finished steel construction provides strength and corrosion resistance suited to road grime, salt spray, and seasonal outdoor storage.
Before ordering, confirm your existing spring style. A slipper spring has one round eye (front mounting point) and a flat, hook-free rear end that slides into a bracket. A double-eye spring has a round eye at both ends. The 710493 is a slipper type. If your trailer currently uses a double-eye, this spring will not fit your existing brackets without bracket modifications.
This spring is used on a wide range of single-axle trailers with Lippert (formerly Lippert Components / LCI) straight-tube or round-tube axles rated at 3,500 lb. Common applications include:
Always cross-reference the spring part number on your existing spring (usually stamped on the main leaf) and confirm axle capacity from the axle certification label before ordering.
Estimated installation time is approximately 2 hours per side with standard hand tools. The job requires safely supporting the trailer frame and axle independently so the axle can drop enough to remove spring tension. General steps: