315/75R16 tire size
A 315/75R16 tire is 34.6 inches (879 mm) tall and 12.4 inches (315 mm) wide, for a 16-inch wheel. Each sidewall is 9.3 inches (236 mm), 75% of the width, and the tire makes about 583 revolutions a mile.
Sources checked
| Dimension | 315/75R16 |
|---|---|
| Overall diameter | 34.60 in (879 mm) |
| Section width | 12.40 in (315 mm) |
| Sidewall height | 9.30 in (236 mm) |
| Aspect ratio | 75% |
| Rim diameter | 16 in |
| Circumference | 108.7 in (2,761 mm) |
| Revolutions per mile | 583 |
| Revolutions per km | 362 |
Compare 315/75R16 with another size
Metric, LT and flotation
A 315/75R16 tire is
34.6in tall879mm
on a 16-inch wheel
- Width
- 12.40 in (315 mm)
- Sidewall
- 9.30 in (236 mm)
- Circumference
- 108.7 in
- Revolutions per mile
- 583
315/75R16 in full
| Dimension | 315/75R16 |
|---|---|
| Overall diameter | 34.60 in (879 mm) |
| Section width | 12.40 in (315 mm) |
| Sidewall height | 9.30 in (236 mm) |
| Aspect ratio | 75% |
| Rim diameter | 16 in |
| Circumference | 108.7 in |
| Revolutions per mile | 583 |
| Revolutions per km | 362 |
The working
- 315/75R16: sidewall = 315 mm × 75% = 236.3 mm = 9.30 in.
- Diameter = rim + 2 × sidewall = 16 + 2 × 9.30 = 34.60 in (879 mm).
- Circumference = π × 34.60 = 108.7 in; revolutions per mile = 63,360 ÷ 108.7 = 583.
Where the 315/75R16 numbers come from
The section width is 315 mm (12.40 inches), and each sidewall is 75% of it: 236.3 mm, or 9.30 inches. Two sidewalls and the 16-inch rim make 34.60 inches (879 mm).
One turn covers π × 34.60 = 108.7 inches, so the tire turns 583 times a mile and 362 times a kilometer.
What tire makers publish for 315/75R16
Inflated on the maker’s measuring rim. The percentage is the printed diameter against the 34.60 inches worked out above.
| Tire | Size as printed | Diameter | Width | Revs per mile |
|---|---|---|---|---|
| Toyo Open Country A/T III | LT315/75R16 | 34.6 in (0.0%) | 12.3 in | 601 |
| Nitto Trail Grappler M/T | LT315/75R16 | 34.8 in (+0.6%) | 12.83 in | – |
Other 16-inch sizes against 315/75R16
Each size’s height against 315/75R16, and what a speedometer set for 315/75R16 shows at 60 mph with that size on.
| Size | Diameter | Width | Height change | At 60 mph shown |
|---|---|---|---|---|
| 205/55R16 | 24.9 in | 8.1 in | −28.1% | 43.1 mph |
| 205/60R16 | 25.7 in | 8.1 in | −25.8% | 44.5 mph |
| 215/60R16 | 26.2 in | 8.5 in | −24.4% | 45.4 mph |
| 215/65R16 | 27.0 in | 8.5 in | −22.0% | 46.8 mph |
| 225/60R16 | 26.6 in | 8.9 in | −23.0% | 46.2 mph |
| 225/65R16 | 27.5 in | 8.9 in | −20.5% | 47.7 mph |
| 225/75R16 | 29.3 in | 8.9 in | −15.4% | 50.8 mph |
| 235/70R16 | 29.0 in | 9.3 in | −16.3% | 50.2 mph |
| 235/85R16 | 31.7 in | 9.3 in | −8.3% | 55.0 mph |
| 245/70R16 | 29.5 in | 9.6 in | −14.7% | 51.2 mph |
| 245/75R16 | 30.5 in | 9.6 in | −11.9% | 52.8 mph |
| 265/70R16 | 30.6 in | 10.4 in | −11.5% | 53.1 mph |
| 265/75R16 | 31.6 in | 10.4 in | −8.5% | 54.9 mph |
| 285/75R16 | 32.8 in | 11.2 in | −5.1% | 56.9 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 315/75R16 in inches?
About 34.6x12.4R16: 34.6 inches tall and 12.4 inches wide on a 16-inch wheel, with 9.3-inch sidewalls. Exactly, 16 + 2 × 315 mm × 0.75 ÷ 25.4 = 34.60 inches.
How many revolutions per mile does a 315/75R16 make?
583 by its diameter: 63,360 inches in a mile ÷ 108.7 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 LT315/75R16 the same size as P315/75R16?
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.