Available in three sizes
Tire diameter calculations: Check your tire number For example, 255 75 R15: 255mm=25.5cm=10.04inch (Tire Width) 75=75% (Flat Rate) R15=15inch (the Diameter of Rim) Tire Diameter= 10.04x75%x2+15=30.06inch. And you can choose the cover size from 30" to 32"