No, read it again. They start out with 185-width tires (14"), then go to 195 (15"), 205 (16"), and 215 (17"). Plus-sizing varies the aspect ratio to keep the overall diameter the same, which is expected. By the time they got to the 17" they had almost an inch and a half more tread on the ground! Gee, I wonder why it performed better... :blushm:
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