Gravel Tuff GTF-06WFF 6" Flat Free Wheel Gravel Tuffs Replacement Wheel will get your equipment where it needs to go Made of high-density polyurethane material with a sawtooth tread for a flat-free tire; this wheel is the ideal size with a wheel diameter of 6 Has a weight capacity of 175 pounds! Contains a 7/16 bearing and a 2 1/4 centered hub The zinc-plated finish adds even more durability and long-lasting quality to this great product 1 year limited Manufacturers warranty