KANSAS CITY, Kan. (AP) - Chase leader Matt Kenseth would have been perfectly happy if Goodyear brought its old tires to Kansas Speedway this weekend.
Instead, the two-time and defending winner at Kansas was among 38 cars on the track Thursday who were testing the new ``multi-zone'' tires that Goodyear has developed.
It's rare that NASCAR changes tires between spring and fall races on the same track, but vice president of competition Robin Pemberton said it made sense at repaved Kansas Speedway.
The tires, which made their debut in the Sept. 1 race at Atlanta, are made of two distinct compounds. One compound features a more tractive tread for better grip and handling, and the other is a firmer compound that helps manage wear on the tire's inside shoulder for better durability.

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