Free Freight. The tire size can be located on the sidewall of the tire. If the tire is older and been well worn it may be harder to read but it should still be there. You should see a series of numbers and letters that look something like this: P225/55 R17 95H.
Our example tire has an index of 98. After a quick glance at the chart, this equates to 1,653 pounds. Speed Rating . The final letter found on your tire size marking is the maximum speed for a tire. Each letter correlates to a given speed in MPH. Ours has the letter S assigned to it, which the Tire Speed Rating Chart lists as a maximum speed of 112 MPH.