Buy 4 tires, store your hooker phone numbers for free.Michelin Man is giving away a free Palm Zire for purchase of 4 tires. Mr. Wirt said the cross-promotion might not be as random a match as it might appear. He said, for example, that the Palm Zire's calendar software could be used to set reminders of when to check tire pressure or to rotate the Michelins. "You'll have a safer car," he said.