This cart is tough, durable, corrosion and UV resistant. It collapses down to easily store in a canoe. Wheels are 16″x4″ with polyethylene rims. Wheels are large enough to roll over large rocks and roots. Tube type tires will not roll off the rim if pressure is reduced for soft terrain. Large pad surface distributes load to protect the canoe bottom. Weight: 21 lbs. Capacity: 350 lbs.