31x18.00R15LT 99H Sportsman S/R Tire

The 31x18.00R15LT 99H Sportsman S/R Tire from Mickey Thompson is engineered for serious off-road and competition drivers who demand reliability in extreme conditions. This directional radial tire bridges the gap between street capability and unforgiving terrain, making it the choice for truck owners and off-road enthusiasts running custom suspension setups. Built on the proven Sportsman S/R platform, it delivers the traction and durability needed for desert runs, rock crawling, and high-speed off-pavement driving without sacrificing on-road manners.

The 31-inch diameter and 18-inch rim width provide an aggressive sidewall profile that absorbs impacts and maintains structural integrity under extreme loads. With a maximum load capacity of 1,720 pounds per tire and H-speed rating (up to 130 mph), this tire handles the punishment of rough terrain while remaining stable at highway speeds. The directional tread pattern is optimized for self-cleaning and mud evacuation, critical when navigating technical trails or wet surfaces. The black sidewall finish adds visual aggression to any build while the radial construction provides consistent contact pressure across varying terrain.

This tire excels on light-truck platforms—particularly 15-inch wheel builds common in vintage and modified trucks—where aggressive sizing and load capacity are non-negotiable. Installation on lifted vehicles with custom wheel spacers is straightforward, and the 52-pound weight per tire is manageable for standard suspension geometry. Verify fitment with your specific truck model, as 31x18 sizing may require slight trimming or suspension tuning on some vehicles. For serious competitors or weekend warriors seeking proven performance in unpredictable conditions, the Sportsman S/R delivers.