Iowa Hawkeyes Tire Cover. These great tire covers are made with a heavy gauge vinyl that has an elastic tie down for an easy fit. It is a universal fit tire cover that fits rims up to 16 (tire diameter up to 29). It's also water resistant, and wipes clean with a damp cloth. Please note These tire covers only fit tires with a maximum diameter of 29. Unfortunately, this tire cover does not fit wide tires or some all-terrain tires due to tread size. Please measure your tire before installing to ensure proper fit.