The Heavy Duty Plastic Boat Lift Wheel makes roll-in docks and boat lift easier to move. Designed with 8″ wide treads to move in rough, soft or uneven terrain and a robust 24″ diameter. Plastic construction is perfect for constant submersion and exposure to harsh winter conditions without damage. The 1.98″ diameter shaft will not rust or corrode, so the wheel will always move freely. 800 lb. capacity per wheel. Sold individually. One-year warranty. Use Smart Jack systems for easier seasonal installation and removal on most boat lift models.