Michigan Goodyear Tire Notes

Teams in both NASCAR series will run the same tire codes at Michigan this weekend, though the Sprint Cup tires will be branded "Goodyear Eagle," while the Craftsman Truck tires will be branded "Goodyear Wrangler" . . . these teams ran this exact combination of left- and right-side tires at Dover two weeks ago . . . compared to the tire codes run at Michigan in 2007, there have been slight changes to the left-side construction to improve grip and performance, as well as to the right-side compound to improve treadwear . . .in addition to Michigan and Dover, Nationwide (this weekend) and Craftsman Truck (July 19) teams are scheduled to run this specific tire set-up at Kentucky this season . . . this left-side code (D-4134) will also be run with a different right-side code at Texas and Chicagoland . . . as on all NASCAR's ovals greater than one mile in length, teams are required to run inner liners in all four tire positions at Michigan . . . air pressure in those inner liners should be 12-25 psi greater than that of the outer tire. Goodyear PR