This tire size chart lists every size in the catalog with overall diameter, section width, sidewall and rim. It is a lookup, not a shopping list. Click a stamp for the converter page, or use the tire size calculator if the size is not in the table. The tire diameter chart is the same data sorted by height.
How to use the chart
Find the stamp you have, read the diameter, then scan for neighbours with a similar height. A swap inside about 3% diameter is the usual first filter for speedometer error and well clearance. Width is the second filter: a much wider tire needs a wider wheel and more room in the well.
Volumes in the research that built this site sit on truck and SUV sizes (275/65R20, 285/70R17, 315/70R17). Passenger-car sizes are here only when they sit next to those. If you need a sedan size, type it into the calculator. The arithmetic is the same.
| Size | Diameter | Width | Sidewall | Rim |
|---|---|---|---|---|
| 225/75R15 | 28.3″ | 8.9″ | 6.6″ | 15 |
| 235/65R17 | 29.0″ | 9.3″ | 6.0″ | 17 |
| 235/75R15 | 28.9″ | 9.3″ | 6.9″ | 15 |
| 245/70R17 | 30.5″ | 9.6″ | 6.8″ | 17 |
| 245/75R16 | 30.5″ | 9.6″ | 7.2″ | 16 |
| 255/65R17 | 30.1″ | 10.0″ | 6.5″ | 17 |
| 255/70R17 | 31.1″ | 10.0″ | 7.0″ | 17 |
| 255/70R18 | 32.1″ | 10.0″ | 7.0″ | 18 |
| 255/75R16 | 31.1″ | 10.0″ | 7.5″ | 16 |
| 255/75R17 | 32.1″ | 10.0″ | 7.5″ | 17 |
| 255/80R17 | 33.1″ | 10.0″ | 8.0″ | 17 |
| 255/85R16 | 33.1″ | 10.0″ | 8.5″ | 16 |
| 265/50R20 | 30.4″ | 10.4″ | 5.2″ | 20 |
| 265/60R20 | 32.5″ | 10.4″ | 6.3″ | 20 |
| 265/65R17 | 30.6″ | 10.4″ | 6.8″ | 17 |
| 265/65R18 | 31.6″ | 10.4″ | 6.8″ | 18 |
| 265/70R17 | 31.6″ | 10.4″ | 7.3″ | 17 |
| 265/70R18 | 32.6″ | 10.4″ | 7.3″ | 18 |
| 265/75R16 | 31.6″ | 10.4″ | 7.8″ | 16 |
| 265/75R17 | 32.6″ | 10.4″ | 7.8″ | 17 |
| 265/80R17 | 33.7″ | 10.4″ | 8.3″ | 17 |
| 275/50R20 | 30.8″ | 10.8″ | 5.4″ | 20 |
| 275/55R20 | 31.9″ | 10.8″ | 6.0″ | 20 |
| 275/60R20 | 33.0″ | 10.8″ | 6.5″ | 20 |
| 275/65R17 | 31.1″ | 10.8″ | 7.0″ | 17 |
| 275/65R18 | 32.1″ | 10.8″ | 7.0″ | 18 |
| 275/65R20 | 34.1″ | 10.8″ | 7.0″ | 20 |
| 275/70R17 | 32.2″ | 10.8″ | 7.6″ | 17 |
| 275/70R18 | 33.2″ | 10.8″ | 7.6″ | 18 |
| 275/75R16 | 32.2″ | 10.8″ | 8.1″ | 16 |
| 275/75R17 | 33.2″ | 10.8″ | 8.1″ | 17 |
| 275/80R17 | 34.3″ | 10.8″ | 8.7″ | 17 |
| 285/55R20 | 32.3″ | 11.2″ | 6.2″ | 20 |
| 285/60R20 | 33.5″ | 11.2″ | 6.7″ | 20 |
| 285/65R17 | 31.6″ | 11.2″ | 7.3″ | 17 |
| 285/65R18 | 32.6″ | 11.2″ | 7.3″ | 18 |
| 285/65R20 | 34.6″ | 11.2″ | 7.3″ | 20 |
| 285/70R16 | 31.7″ | 11.2″ | 7.9″ | 16 |
| 285/70R17 | 32.7″ | 11.2″ | 7.9″ | 17 |
| 285/75R16 | 32.8″ | 11.2″ | 8.4″ | 16 |
| 285/75R17 | 33.8″ | 11.2″ | 8.4″ | 17 |
| 285/75R18 | 34.8″ | 11.2″ | 8.4″ | 18 |
| 295/55R20 | 32.8″ | 11.6″ | 6.4″ | 20 |
| 295/60R20 | 33.9″ | 11.6″ | 7.0″ | 20 |
| 295/65R20 | 35.1″ | 11.6″ | 7.5″ | 20 |
| 295/70R17 | 33.3″ | 11.6″ | 8.1″ | 17 |
| 295/75R16 | 33.4″ | 11.6″ | 8.7″ | 16 |
| 295/75R17 | 34.4″ | 11.6″ | 8.7″ | 17 |
| 305/55R20 | 33.2″ | 12.0″ | 6.6″ | 20 |
| 305/70R16 | 32.8″ | 12.0″ | 8.4″ | 16 |
| 305/70R17 | 33.8″ | 12.0″ | 8.4″ | 17 |
| 305/75R16 | 34.0″ | 12.0″ | 9.0″ | 16 |
| 315/70R17 | 34.4″ | 12.4″ | 8.7″ | 17 |
| 315/75R16 | 34.6″ | 12.4″ | 9.3″ | 16 |
| 31x10.50R15 | 31.0″ | 10.5″ | 8.0″ | 15 |
| 325/75R16 | 35.2″ | 12.8″ | 9.6″ | 16 |
| 33x12.50R15 | 33.0″ | 12.5″ | 9.0″ | 15 |
| 33x12.50R17 | 33.0″ | 12.5″ | 8.0″ | 17 |
| 33x12.50R18 | 33.0″ | 12.5″ | 7.5″ | 18 |
| 33x12.50R20 | 33.0″ | 12.5″ | 6.5″ | 20 |
| 35x12.50R17 | 35.0″ | 12.5″ | 9.0″ | 17 |
| 35x12.50R18 | 35.0″ | 12.5″ | 8.5″ | 18 |
| 35x12.50R20 | 35.0″ | 12.5″ | 7.5″ | 20 |
| 37x12.50R17 | 37.0″ | 12.5″ | 10.0″ | 17 |
Chart vs comparison
A chart answers "how tall is this stamp." A comparison answers "what happens if I change it." Use the tire size comparison when you have two candidates. Use this page when you are still picking the second stamp.
E-load and C-load versions of the same stamp share a diameter and do not share a capacity. The load index page is that table. Do not buy off height alone.