Both Cup and Xfinity Series will race on new tire compounds on all four tires this weekend at Michigan International Speedway.
The compounds on both the left and right-side tires are a result of an April tire test at the 2-mile track. The test involved Aric Almirola, Alex Bowman, Austin Dillon, Brad Keselowski and Martin Truex Jr.
Compared to what was run at Michigan last year, this left-side tire features an updated construction that brings it into line with what is run at other speedways and a new compound to introduce more wear, while this right-side is a single tread compound tire (last year was a multi-zone tread tire) with a new compound that will introduce more wear and run cooler.
Keselowski voiced his disappointment in the choice of tire.
Here’s the tire info for Cup and Xfinity.
Set limits: Cup: Three sets for practice, one set for qualifying and seven sets for the race; Xfinity: Six sets for the event
Tire Codes: Left-side — D-4770; Right-side — D-4796
Tire Circumference: Left-side — 2,227 mm (87.68 in.); Right-side — 2,251 mm (88.62 in.)
Minimum Recommended Inflation: Left Front – 22 psi; Left Rear – 22 psi; Right Front – 54 psi; Right Rear – 50 psi
Camping World Truck Series -Texas Motor Speedway
This is the first time Truck Series teams will run this left-side tire code at Texas, though they did run this same right-side code twice at the track last season. Compared to what Truck teams ran at Texas last season, this left-side tire features a construction update to align with what is run at other speedways.
Set limits: Six sets for the event
Tire Codes: Left-side — D-4782; Right-side — D-4718
Tire Circumference: Left-side — 87.68 in. (2,227 mm); Right-side — 88.62 in. (2,251 mm)
Minimum Recommended Inflation: Left Front — 24 psi; Left Rear — 22 psi; Right Front — 52 psi; Right Rear — 50 psi