The outcome of the MotoGP race at Misano was decided some time ago. Several key decisions went into determining the result, most of them many weeks, or even many months ago. Those decisions set in motion a train of events that led inexorably to the domination of a single manufacturer at the Misano World Circuit on Sunday.
One of those decisions was to microblast the surface of the track to remove the build up of rubber from the track and improve the grip in the wet. The microblasting took place some three months ago, and on Saturday, Michelin boss Piero Taramasso explained what had been done. "They shot very small balls of metal with high speed into the asphalt. From one big stone, this treatment makes many smaller stones. So this treatment you reduce the macro roughness, and you increase the micro roughness."
"Normally this is the way to increase the grip. What happens is that as soon as you do the treatment, you increase the wet grip. In wet conditions the grip is better instantly. But for the dry, you have to wait more and more time for dry grip because this treatment cleans all the track. It makes it like a brand new track, no rubber, nothing on the floor. So that’s why the grip on dry is lower for the first five, six, or seven months. After that, after the track has been used a few times, sometimes it’s better."