NITTO 37x13.50R17LT, Mud Grappler Part Number: NIT200-600 Tire Size: 37x13.50R17LT Black Side Wall Tread Depth: 21/32 Overall Diameter: 37.05 Approved Rim: 8.5 - 11 Max Load: 4300 Load Rating: E Speed Rating: P The Nitto Mud Grappler Extreme Terrain tires are designed to provide exceptional off-road traction. The Mud Grappler features monstrous 15mm side-lugs, which provide excellent sidewall puncture resistance along with outstanding rock crawling and mud traction. The computer designed tread pattern features a high void ratio for excellent clearing of mud and dirt, anti-side slip grooves for better lateral traction, and sipes for performance on snow and slush. The Mud Grappler features three-ply, high turn-up polyester sidewalls that provide strength and durability in demanding terrain.