Special Vehicle Notes
When searching by tire size alone, please be aware that the displayed results may not be applicable (or recommended) for your vehicle due to several factors (including but not limited to size, speed rating, load capacity, intended service conditions, etc.).
To view MICHELIN® recommended tire options for your vehicle click "Search by Vehicle" and enter the required information.
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How to find your size
All the tire size information is located on your tires’ sidewall.
- 255
- 55
- 18
- 97
- T
Width
This three-digit number represents the width of the tyre in millimeters (mm), measured from sidewall to sidewall. Since this measure is affected by the width of the rim, the measurement is done when the tyre is on its intended rim size.
Ratio
This identifies the tire’s aspect ratio, which is the relationship of the tire’s sidewall height to the tire’s width. In this example, the sidewall height of the tire is 55% of its width. The lower the ratio, the smaller the sidewall height, which means better cornering, but a rougher ride.
Diameter
This number (in inches) indicates that the tire is designed to fit on a wheel with an 18-inch diameter.
Load Index
This indicates how much weight the tire is certified to carry at maximum safe inflation. It doesn’t mean 97 pounds, because it’s actually an assigned value that corresponds with its “actual” load capacity found on a load index chart. If you look up 97 on the chart, you’ll find 1,609 pounds.
Speed Index
This indicates the maximum safe speed at which a tire is certified to carry a load under specified conditions. Speed ratings range from A (lowest) to Y (highest), with one exception: H falls between U and V. Exceeding the lawful speed limit is neither recommended or endorsed.
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