A few days after the events of the Andalusian Grand Prix, with time to let what happened in Jerez to sink in, there was a lot that missed in my Sunday race notes. If you want to know about Yamaha's high hopes and deep concerns, Rossi's podium return, the Ducatis, KTMs, and what it might mean for Brno and Austria, go back and read that first. Here's what I missed the first time around.
Yesterday, media monolith Motorsport.com reported that Michelin had advised the MotoGP teams to use the Sunday morning warm up to scrub in a new tire to use in the race. Scrubbing in is an old technique, originally recommended as a way to remove the chemical film which can remain on the surface of a new tire as it is removed from the mold – something which Michelin says is no longer needed, as modern tires don't have that surface film let by the mold.
This, however, is something different. The aim of scrubbing these tires in is different. Teams were advised that their riders should do an out lap, a fast lap, and then an in lap, then wait before putting the tires back in the warmers. The goal here is to raise the internal temperature of the tires to operating temperature, then let them cool, precipitating a chemical change inside the tire. Putting them back on the tire warmers then stops that change.