Michelin Starcross 5 100/90-19 57M Medium Rear TyreMichelin Starcross 5 100 90 19 57M Medium Rear Tyre After a three year testing and development program, Michelin has launched its brand new range of StarCross5 motocross tyres in Australia, listing a number of advantages over the previous Starcross 3 and 4 line ups, including a lighter casing, increased straight line traction, better handling, and the ability to run higher inflation to reduce the risk of tyre pinch without compromising performance.