Dunlop's vast championship experience and development expertise has been infused into the next generation of offroad tires, the Geomax AT81. These Geomax motorcycle tires offer more all around performance plus higher levels of ruggedness for offroad racing and motocross riding. Constructed using two nylon plies High wear resistant tire compound offers enhanced chipping, tearing and wear appearance Center blocks are arranged in line to provide a larger contact patch for maximum traction DGD (DIRTuitive Grip Design) knobs help the tire penetrate down through the surface dirt for extra traction across a broad range of offroad applications Lateral grooves on the shoulder knobs provide additional biting edges and also allow the knobs to be more flexible Plush pad recess design between tread blocks enhances compliance for bump absorption and ride comfort Offers more all-around performance plus higher levels of ruggedness These dirt bike tires are M rated for speeds up to 81 mph Note: Rim sold separately. Available in the following motorcycle tire sizes: 110/90-18, 110/100-18, and 120/90-18.