Tire - StarCross 6 Medium Hard - Front - 90/100-21 - 57M Michelin? Silica Technology* provides up to 19% more traction d to previous generation when worn (2); helps maintain tread block integrity promoting excellent traction over the life of the tire, Michelin? Silica Technology* provides up to 11% more durability (3), The adaptive design provides up to 16% more traction when d to the previous generation (1), (1) Based on internal testing conducted in 2021 in Vertaizon, France on intermediate track using a '20 Yamaha 450 YZF fitted with a new 110/90-19 Michelin? StarCross? 6 Medium Hard d with a new Michelin? StarCross? 5 Medium rear tire. Actual results may vary., (2) Based on internal testing conducted in 2021 in Jonquieres, France on hard track using a '19 KTM 450 EXC fitted with a worn 110/90-19 Michelin? StarCross? 6 Medium Soft d with a worn Michelin? StarCross? 5 Soft rear tire. Actual results may vary., (3) Based on internal wear testing conducted in 2021 in Jonquieres, France on hard track using a '19 KTM 450 EXC fitted with a worn 110/90-19 Michelin? StarCross? 6 Medium Soft d with a worn Michelin? StarCross? 5 Soft rear tire. Actual results may vary.