The Artrax XC Enduro Tire is designed for the most gnarly off-road terrain at which you can throw your bike. Whether you're blasting at high-speeds through the desert or climbing steep rocky trails like a mountain goat, this tire will provide you with the traction and confidence when you need it most. Made for Soft / Intermediate / Hard terrain. The "Fat" design of the 90/100-21 size allows the tire to absorb more shock and impact against rocks and tree roots causing less front wheel deflection and fatigue on the rider for a more comfortable ride. Artrax XC Enduro tires offer excellent traction in a variety of off-road terrains such as rocks, mud, tree roots, desert and single-track. Tread pattern offers great grip in all terrains and improved mud cleanout. Durable tire compound. Sold individually.