One 90/90-21 Pirelli MT21 Front Tire for Sale. Used, but in good condition. Below is info from the manufacture… • Developed for globetrotting motorcyclists and rally specialists who are looking for maximum flexibility of use, from the dunes of the desert to wide-ranging tourism on asphalt roads • A flexible carcass to ensure high stability and precision in setting and following trajectories • An optimised tread for use on dirt tracks and gravel, cross country racing and in the desert • High performance off road and the blocks has greater resistance to tearing thanks to the specific compound • Innovative carcass structure capable of supporting the bike's high speeds whilst ensuring high resistance to punctures