Mastercraft Courser LTR All-Season Radial Tire - 31x10.50R15/6 109R Modern All Terrain Design. The five-rib tread design creates a pattern of gripping edges that allows the tire to perform equally well on the road and off. Wide Footprint / Dual Tread Arc. A wider tread footprint along with a dual radius tread arc, gives this tire uniform pressure distribution across the contact patch for even wear and consistent grip. Modern Sidewall Styling. Available in outline white letter and outline black letter styling in specific sizes. Top Range of Sizes to fill the replacement requirements for the most popular pick-ups, and vans used for commercial or recreational purposes.