Home › 17" tire sizes › 245/75R17
245/75R17 tire size in inches
245/75R17 is 31.47" tall and 9.65" wide, and fits a 17" rim. In flotation (inch) sizing that is roughly 31.5x9.6R17.
245/75R17 dimensions
| Measurement | Inches | Metric |
|---|---|---|
| Overall diameter (height) | 31.47" | 799 mm |
| Section width | 9.65" | 245 mm |
| Sidewall height | 7.23" | 183.8 mm |
| Rim diameter | 17" | 431.8 mm |
| Circumference | 98.9" | 2511 mm |
| Revolutions per mile | 641 | |
| Aspect ratio | 75% (sidewall is 75% of the width) | |
Drawn to scale
Among the 124 sizes for 17" wheels on this site, 245/75R17 is #72 by height (shortest: 205/40R17, tallest: 385/70R17).
What people compare 245/75R17 with
Real comparisons drivers search for, worked out against 245/75R17:
| Compared size | Height | Width | Sidewall | Speedo at true 60 |
|---|---|---|---|---|
| 265/70R17 | +0.14" (+0.44%) | +0.78" | +0.07" | 59.7 mph |
| 235/80R17 | +0.33" (+1.05%) | -0.40" | +0.17" | 59.4 mph |
| 285/70R17 | +1.24" (+3.94%) | +1.57" | +0.62" | 57.7 mph |
| 245/70R17 | -0.97" (-3.08%) | 0.00" | -0.48" | 61.9 mph |
| 255/75R17 | +0.59" (+1.87%) | +0.39" | +0.30" | 58.9 mph |
| 245/65R17 | -1.93" (-6.13%) | 0.00" | -0.96" | 63.9 mph |
| 255/80R17 | +1.59" (+5.05%) | +0.39" | +0.80" | 57.1 mph |
| 265/65R17 | -0.91" (-2.89%) | +0.78" | -0.45" | 61.8 mph |
How the 245/75R17 numbers are worked out
The size code reads as 245 mm section width, 75% aspect ratio, R for radial construction and 17-inch wheel.
- Sidewall = 245 × 75% = 183.8 mm = 7.23"
- Diameter = 17" + 2 × 7.23" = 31.47"
- Circumference = π × 31.47" = 98.9"
- Revs per mile = 63,360" ÷ 98.9" = 641
Sizes that can replace 245/75R17 on a 17" wheel
Within 3% of 31.47". Last column: speedometer reading at a true 60 mph.
| Size | Diameter | Width | Difference | Speedo at true 60 mph |
|---|---|---|---|---|
| 305/60R17 | 31.41" | 12.01" | -0.19% | 60.1 mph |
| 285/65R17 | 31.59" | 11.22" | +0.38% | 59.8 mph |
| 265/70R17 | 31.61" | 10.43" | +0.44% | 59.7 mph |
| 260/70R17 | 31.33" | 10.24" | -0.44% | 60.3 mph |
| 235/80R17 | 31.80" | 9.25" | +1.05% | 59.4 mph |
| 275/65R17 | 31.07" | 10.83" | -1.27% | 60.8 mph |
| 255/70R17 | 31.06" | 10.04" | -1.3% | 60.8 mph |
| 270/70R17 | 31.88" | 10.63" | +1.3% | 59.2 mph |
| 315/60R17 | 31.88" | 12.40" | +1.3% | 59.2 mph |
| 295/60R17 | 30.94" | 11.61" | -1.68% | 61 mph |
| 255/75R17 | 32.06" | 10.04" | +1.87% | 58.9 mph |
| 235/75R17 | 30.88" | 9.25" | -1.87% | 61.1 mph |
One size wider or narrower
- Narrower: 235/75R17 — 9.25" wide, 30.88" tall
- Wider: 255/75R17 — 10.04" wide, 32.06" tall
Same height on a different wheel size
- 245/85R15 15" (-0.22%)
- 295/70R15 15" (-0.67%)
- 265/80R15 15" (+0.7%)
- 275/75R15 15" (-0.73%)
- 305/70R15 15" (+1.08%)
- 285/75R15 15" (+1.14%)
- 255/80R15 15" (-1.3%)
- 255/85R15 15" (+1.91%)
- 245/80R16 16" (-0.13%)
- 280/70R16 16" (-0.13%)
Questions about 245/75R17
How tall is a 245/75R17 tire in inches?
A 245/75R17 tire is 31.47 inches (799 mm) tall: the 17-inch rim plus two sidewalls of 7.23 inches each.
Is 245/75R17 a 31 inch tire?
Yes. At 31.47 inches tall it is commonly called a 31-inch tire.
How many revolutions per mile does a 245/75R17 make?
About 641 revolutions per mile, based on a calculated circumference of 98.9 inches.
What size can replace 245/75R17?
305/60R17 is the closest match on a 17" rim (-0.19% height). Check load index, speed rating and clearance first.
Compare 245/75R17 against any other size with the tire size calculator.