Dunlop Geomax AT81 Rear Tire (110/100-18) With the development of the Geomax&#174; line of premium off-road tires - the MX71&trade;, MX51&trade;, MX31&trade; and MX11&trade; - Dunlop has placed a hammerlock on success at the highest levels of racing in the dirt by winning every AMA Supercross and Now, that same championship experience and development expertise plus much more has been rolled into the next generation of off-road tires: the all-new Geomax AT81&trade; and Geomax AT81 RC (Reinforced Construction). Dunlop has had much success in off-road racing, with titles in Enduro, Hare Scrambles, GNCC and WORCS competition. The AT81 and AT81 RC are an outgrowth of Dunlop's off-road racing success. These additions to the Geomax family offer even more all-around performance, plus a higher level of ruggedness than Dunlop's current D952 - just the ticket for the demanding, wide-ranging terrain encountered in off-road riding.