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Bridgestone technicians working on tires at race track.
Photo (c) 2007 Brad Spurgeon licensed to About.com, Inc.
From the Friday to the Sunday, through practice, qualifying and the race, Bridgestone engineers and technicians closely monitor all of the tires. They note the tire temperatures and pressures, and also work throughout the weekend in the the fitting area on any last minute work. That area becomes especially busy if the weather moves from dry to wet, and more rain tires are required to be fitted.