Truck Tire Size Chart: Every Common Size in Inches
How to use it
Find your wheel size, then read across for the real height and width. Metric sizes like 285/70R17 hide their height behind millimeters and percentages; this chart does the math. Click any size for the full breakdown and the tires in stock, or put two sizes head-to-head in the calculator.
15-inch wheel tire sizes
| Size | Height | Width | Sidewall | Class | In the other system* |
|---|---|---|---|---|---|
| 31x10.50R15 | 31.0" | 10.5" | 8.0" | 31" | 267/76R15 |
| 33x12.50R15 | 33.0" | 12.5" | 9.0" | 33" | 318/72R15 |
| 35x12.50R15 | 35.0" | 12.5" | 10.0" | 35" | 318/80R15 |
16-inch wheel tire sizes
17-inch wheel tire sizes
| Size | Height | Width | Sidewall | Class | In the other system* |
|---|---|---|---|---|---|
| 265/65R17 | 30.6" | 10.4" | 6.8" | 31" | 30.6x10.4R17 |
| 245/75R17 | 31.5" | 9.6" | 7.2" | 31" | 31.5x9.6R17 |
| 265/70R17 | 31.6" | 10.4" | 7.3" | 32" | 31.6x10.4R17 |
| 285/70R17 | 32.7" | 11.2" | 7.9" | 33" | 32.7x11.2R17 |
| 33x12.50R17 | 33.0" | 12.5" | 8.0" | 33" | 318/64R17 |
| 295/70R17 | 33.3" | 11.6" | 8.1" | 33" | 33.3x11.6R17 |
| 285/75R17 | 33.8" | 11.2" | 8.4" | 34" | 33.8x11.2R17 |
| 315/70R17 | 34.4" | 12.4" | 8.7" | 34" | 34.4x12.4R17 |
| 35x12.50R17 | 35.0" | 12.5" | 9.0" | 35" | 318/72R17 |
| 37x12.50R17 | 37.0" | 12.5" | 10.0" | 37" | 318/80R17 |
18-inch wheel tire sizes
| Size | Height | Width | Sidewall | Class | In the other system* |
|---|---|---|---|---|---|
| 275/65R18 | 32.1" | 10.8" | 7.0" | 32" | 32.1x10.8R18 |
| 285/65R18 | 32.6" | 11.2" | 7.3" | 33" | 32.6x11.2R18 |
| 265/70R18 | 32.6" | 10.4" | 7.3" | 33" | 32.6x10.4R18 |
| 33x12.50R18 | 33.0" | 12.5" | 7.5" | 33" | 318/60R18 |
| 275/70R18 | 33.2" | 10.8" | 7.6" | 33" | 33.2x10.8R18 |
| 295/70R18 | 34.3" | 11.6" | 8.1" | 34" | 34.3x11.6R18 |
| 35x12.50R18 | 35.0" | 12.5" | 8.5" | 35" | 318/68R18 |
20-inch wheel tire sizes
| Size | Height | Width | Sidewall | Class | In the other system* |
|---|---|---|---|---|---|
| 275/55R20 | 31.9" | 10.8" | 6.0" | 32" | 31.9x10.8R20 |
| 285/55R20 | 32.3" | 11.2" | 6.2" | 32" | 32.3x11.2R20 |
| 275/60R20 | 33.0" | 10.8" | 6.5" | 33" | 33.0x10.8R20 |
| 33x12.50R20 | 33.0" | 12.5" | 6.5" | 33" | 318/52R20 |
| 305/55R20 | 33.2" | 12.0" | 6.6" | 33" | 33.2x12.0R20 |
| 295/60R20 | 33.9" | 11.6" | 7.0" | 34" | 33.9x11.6R20 |
| 275/65R20 | 34.1" | 10.8" | 7.0" | 34" | 34.1x10.8R20 |
| 35x12.50R20 | 35.0" | 12.5" | 7.5" | 35" | 318/60R20 |
| 37x12.50R20 | 37.0" | 12.5" | 8.5" | 37" | 318/68R20 |
| 37x13.50R20 | 37.0" | 13.5" | 8.5" | 37" | 343/63R20 |
22-inch wheel tire sizes
| Size | Height | Width | Sidewall | Class | In the other system* |
|---|---|---|---|---|---|
| 33x12.50R22 | 33.0" | 12.5" | 5.5" | 33" | 318/44R22 |
| 35x12.50R22 | 35.0" | 12.5" | 6.5" | 35" | 318/52R22 |
| 37x13.50R22 | 37.0" | 13.5" | 7.5" | 37" | 343/56R22 |
Heights are nominal, calculated from the size itself. Mounted tires vary a few tenths of an inch by brand, load range, rim width, and pressure. New to the notation? Start with how to read a tire size.
Frequently Asked Questions
How do I convert a metric tire size to inches?+
Multiply the width (first number, in millimeters) by the aspect ratio (second number, as a percent) to get the sidewall height, divide by 25.4 to get inches, double it for top and bottom, and add the wheel diameter. For 285/70R17: 285 × 0.70 = 199.5 mm = 7.85", times two is 15.7", plus 17 is a 32.7-inch tire.
What tire size is a 33-inch tire?+
On 17-inch wheels the common metric 33s are 285/70R17 (32.7") and 285/75R17 (33.8"); on 18s, 295/70R18 (34.3") runs a touch big and 275/70R18 (33.2") is the closest; on 20s, 295/60R20 (34.0") and 33x12.50R20 are the usual picks. Check the chart for exact heights.
What tire size is a 35-inch tire?+
Most 35s are sold in flotation sizing, 35x12.50R17, R18, R20, or R22, so the height is right in the name. The common metric 35 is 315/70R17 at 34.4", which runs a little short.
Why are two "33-inch" tires different heights?+
Metric sizes are rounded by habit, not by spec. A 285/70R17 is 32.7" and a 285/75R17 is 33.8", and both get called 33s. Flotation sizes state the height directly but still vary a few tenths by brand. Compare the actual numbers before you count on clearance.