These tires were developed by GMZ in conjunction with 10 time off road racing champion Ivan Stewart. Together, they have developed the best off road racing and recreational desert tire available for UTV’s today. With Ivan’s input and tread design, GMZ was able to build the best handling and most durable tire available on the market. The Ivan “IRONMAN” Stewart Edition tire offers superior traction with its innovative tread design and durable 8ply DOT radial construction. These tires are designed with an innovative shoulder lug that extends down the sidewall of the tire to help deliver extra traction as well as to help deflect rocks and avoid sidewall punctures. The special compound and 100% natural rubber used in the tire will keep you in control at all times. The Ivan “IRONMAN” Stewart edition by GMZ is available in 32x9.5-14, 30x9.5-15 and 32x9.5-15.