Suspension upgrade system provides a smooth, comfortable towing experience. Slipper leaf springs replace existing leaf springs. Center hanger boxes replace standard equalizers. Heavy-duty gas shocks absorb road vibration. Center hanger boxes isolate leaf springs to prevent shock transfer between axles. Independent axle operation increases traction by as much as 70 percent during braking. Built-in rollers keep spring ends from hopping inside of box to create a smoother, quieter, more controlled ride. Nitrogen-charged shock absorbers help to eliminate trailer bouncing, chucking, and porpoising. Limit up-and-down motion of trailer on both compression and rebound. Help to control trailer sway by limiting lateral movement. Maintenance-free Never Fail bushings come pressed into spring eyes. Constructed with molybdenum and graphite, more durable than brass or nylon Simple, bolt-on installation. Application: triple-axle trailers. Axle size: 3-1/2" diameter. Spring capacity: 4,000 lbs per spring. Leaf spring dimensions: 27" long (from center of spring eye to end of spring) x 1-3/4" wide. Eye diameter with bushing installed: 3/4" (9/16" without bushing). Leaf thickness: 3/8". Number of leaves: 7. Shock length: Extended 17-1/2", Compressed: 11-1/2". Quantity: Slipper springs: 6, Center hanger boxes: 3, Shocks: 6.

 PROP 65 WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov