Maxxcross MX-ST is designed to compete at the highest levels of motocross and supercross. Designed and tested with 7X Supercross champion Jeremy McGrath, the new tread pattern, compound, and tire composition provide the stability, predictability, and traction that the top tiers of motocross demandTread pattern designed to optimize traction and braking performance while inspiring confidence and predictability in intermediate to soft soil conditionsLightweight pliable carcass design improves ride comfort, impact absorption, and rider feelRacing specific compounds deliver excellent traction and stabilityCompetition motocross/supercross Aspect Ratio100Construction- (Bias)Load/Speed-Index51MMarket SegmentOffroadMounting PositionFrontPositionFrontProduct NameTireRim Diameter21''SidewallBlackwallStyleMX, Competition, SupercrossTire Size80/100-21Tread Pattern/ModelM7332 MaxxcrossTube TypeTube TypeUnitsEachVendor part number72742481Width80