Michelin pro 3 race tyres grey free tubesthe pro 3 race benefits from michelins bi compound technology with a soft rubber compound on the sidewall and a more rigid type in the centre this central band provides efficient performance and improves the grip thanks to the energy compound rubber mix super grip 6mm thick rubber on each side improves the grip whatever the angle of bends and turns the pro 3 race brings you the ultimate mix of safety performance and longevity a1 airstop butyl t