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To make sure we would have some resemblance of rear grip, we contacted American Muscle for new Sumitomo treads. With the 18x10 GT4 wheels out back, we went with 285/35 Sumitomo HTR Z IIIs. The Sumitomos do the best they can at maintaining grip, but even with these new treads, the Coyote still breaks them loose even from a roll when I punch the throttle in Second gear. It's 100-percent fun. However, one thing I really like about the Sumitomo HTR Z IIIs is their durability. These tires last quite a while, and that's even on a daily driven car like the Coyote Cobra.