I have wheels on my car that are a different size than the wheel used for the Modern Spare. For example, my wheels might be 19" or 20", while the Modern Spare uses an 18" wheel. Is this okay?

Regardless of your vehicle's wheel size option, we have predetermined the correct tire size for your car.

Rest assured, Modern Spare has carefully designed our spare tire assemblies to be the correct size for your vehicle. 

If you notice that a spare offered for your vehicle model uses an 18" wheel and your car has 17", 19", 20", or even 21" wheels, the tire on that spare wheel will be sized specifically for your car. 

The critical measurement is known as "rolling diameter," which refers to the overall height of the tire. This measurement differs significantly from the wheel diameter. 

The graphic below illustrates how wheel diameter can differ while keeping the overall tire height consistent: