Universal Vinyl Black 30in-32in Spare Tire Cover (773201) by Smittybilt. Protect your spare tire from harmful UV rays and heat from the sun and preserve the wheel finish, while giving the back of your Jeep a more complete, finished look with a Smittybilt Spare Tire Cover. These covers are proportioned for the tire diameter for a stylish, form fitting appearance, and come in sizes to fit 27in-37in diameter tires in your choice of colors.