235/75R15 tire size
A 235/75R15 tire is 28.9 inches (733 mm) tall and 9.3 inches (235 mm) wide, for a 15-inch wheel. Each sidewall is 6.9 inches (176 mm), 75% of the width, and the tire makes about 698 revolutions a mile.
Sources checked
| Dimension | 235/75R15 |
|---|---|
| Overall diameter | 28.88 in (733 mm) |
| Section width | 9.25 in (235 mm) |
| Sidewall height | 6.94 in (176 mm) |
| Aspect ratio | 75% |
| Rim diameter | 15 in |
| Circumference | 90.7 in (2,304 mm) |
| Revolutions per mile | 698 |
| Revolutions per km | 434 |
Compare 235/75R15 with another size
Metric, LT and flotation
A 235/75R15 tire is
28.9in tall733mm
on a 15-inch wheel
- Width
- 9.25 in (235 mm)
- Sidewall
- 6.94 in (176 mm)
- Circumference
- 90.7 in
- Revolutions per mile
- 698
235/75R15 in full
| Dimension | 235/75R15 |
|---|---|
| Overall diameter | 28.88 in (733 mm) |
| Section width | 9.25 in (235 mm) |
| Sidewall height | 6.94 in (176 mm) |
| Aspect ratio | 75% |
| Rim diameter | 15 in |
| Circumference | 90.7 in |
| Revolutions per mile | 698 |
| Revolutions per km | 434 |
The working
- 235/75R15: sidewall = 235 mm × 75% = 176.3 mm = 6.94 in.
- Diameter = rim + 2 × sidewall = 15 + 2 × 6.94 = 28.88 in (733 mm).
- Circumference = π × 28.88 = 90.7 in; revolutions per mile = 63,360 ÷ 90.7 = 698.
Where the 235/75R15 numbers come from
The section width is 235 mm (9.25 inches), and each sidewall is 75% of it: 176.3 mm, or 6.94 inches. Two sidewalls and the 15-inch rim make 28.88 inches (733 mm).
One turn covers π × 28.88 = 90.7 inches, so the tire turns 698 times a mile and 434 times a kilometer.
What tire makers publish for 235/75R15
Inflated on the maker’s measuring rim. The percentage is the printed diameter against the 28.88 inches worked out above.
| Tire | Size as printed | Diameter | Width | Revs per mile |
|---|---|---|---|---|
| Toyo Extensa A/S II | P235/75R15 | 28.9 in (+0.1%) | 9.3 in | 720 |
| Toyo Open Country A/T III | P235/75R15 | 28.9 in (+0.1%) | 9.3 in | 720 |
| Toyo Open Country A/T III | LT235/75R15 | 29.1 in (+0.8%) | 9.3 in | 714 |
Other 15-inch sizes against 235/75R15
Each size’s height against 235/75R15, and what a speedometer set for 235/75R15 shows at 60 mph with that size on.
| Size | Diameter | Width | Height change | At 60 mph shown |
|---|---|---|---|---|
| 195/65R15 | 25.0 in | 7.7 in | −13.5% | 51.9 mph |
| 205/65R15 | 25.5 in | 8.1 in | −11.7% | 53.0 mph |
| 31x10.50R15 | 31.0 in | 10.5 in | +7.3% | 64.4 mph |
| 33x12.50R15 | 33.0 in | 12.5 in | +14.3% | 68.6 mph |
Every size: the tire size calculator. With the wheels off, the nuts go back on at your vehicle’s lug nut torque.
Questions
What is 235/75R15 in inches?
About 28.9x9.3R15: 28.9 inches tall and 9.3 inches wide on a 15-inch wheel, with 6.9-inch sidewalls. Exactly, 15 + 2 × 235 mm × 0.75 ÷ 25.4 = 28.88 inches.
How many revolutions per mile does a 235/75R15 make?
698 by its diameter: 63,360 inches in a mile ÷ 90.7 inches a turn. Tire makers’ published figures are measured under load, when the tire rolls on a slightly smaller radius, and run 2.8% to 3.3% higher in Toyo’s tables.
Is LT235/75R15 the same size as P235/75R15?
In dimensions, yes: the numbers mean the same in every metric size. The letters mark what the tire is built for, and an LT tire’s load is rated differently, so check the load index and pressure your vehicle needs before swapping one for the other.
Sources
- Bridgestone Americas: Determining tire size: P-metric, Euro-metric, LT-metric, C-type and flotation sizes, and what each number means (checked October 28, 2026)
- Toyo Tires: Extensa A/S II sizes and specifications: inflated overall diameter and width, revolutions per mile (checked October 28, 2026)
- Toyo Tires: Proxes Sport A/S sizes and specifications: inflated overall diameter and width, revolutions per mile (checked October 28, 2026)
- Toyo Tires: Open Country A/T III sizes and specifications: P-metric, LT-metric and flotation sizes, with revolutions per mile (checked October 28, 2026)
- Nitto Tire: Trail Grappler M/T sizes and specs: inflated overall diameter and width, LT-metric and flotation sizes (checked October 28, 2026)
Spotted a number that doesn’t match your manual or a source? Tell us; corrections are logged on the sources page.