CarTireSize

Tire size comparison

Your current size on the left, the one you are thinking of on the right. Every number below is calculated from the two sizes.

Current size
New size

Before you change size

  • Your car maker lists the sizes it approved on the sticker inside the driver's door and in the owner's manual.
  • A different diameter changes what the speedometer and odometer show. A tire shop can confirm a new size clears your wheels, brakes, fenders and suspension.
  • Keep the load index and speed rating at least as high as the original. How to read them.