Home › 17" tire sizes › 245/70R17
245/70R17 tire size in inches
245/70R17 is 30.50" tall and 9.65" wide, and fits a 17" rim. In flotation (inch) sizing that is roughly 30.5x9.6R17.
245/70R17 dimensions
| Measurement | Inches | Metric |
|---|---|---|
| Overall diameter (height) | 30.50" | 775 mm |
| Section width | 9.65" | 245 mm |
| Sidewall height | 6.75" | 171.5 mm |
| Rim diameter | 17" | 431.8 mm |
| Circumference | 95.8" | 2434 mm |
| Revolutions per mile | 661 | |
| Aspect ratio | 70% (sidewall is 70% of the width) | |
Drawn to scale
Among the 124 sizes for 17" wheels on this site, 245/70R17 is #62 by height (shortest: 205/40R17, tallest: 385/70R17).
What people compare 245/70R17 with
Real comparisons drivers search for, worked out against 245/70R17:
| Compared size | Height | Width | Sidewall | Speedo at true 60 |
|---|---|---|---|---|
| 265/70R17 | +1.11" (+3.64%) | +0.78" | +0.55" | 57.9 mph |
| 245/65R17 | -0.96" (-3.15%) | 0.00" | -0.48" | 61.9 mph |
| 265/65R17 | +0.06" (+0.2%) | +0.78" | +0.03" | 59.9 mph |
| 285/70R17 | +2.21" (+7.25%) | +1.57" | +1.10" | 55.9 mph |
| 245/75R17 | +0.97" (+3.18%) | 0.00" | +0.48" | 58.2 mph |
| 255/70R17 | +0.56" (+1.84%) | +0.39" | +0.28" | 58.9 mph |
| 275/70R17 | +1.66" (+5.44%) | +1.18" | +0.83" | 56.9 mph |
| 235/65R17 | -1.47" (-4.82%) | -0.40" | -0.74" | 63 mph |
How the 245/70R17 numbers are worked out
The size code reads as 245 mm section width, 70% aspect ratio, R for radial construction and 17-inch wheel.
- Sidewall = 245 × 70% = 171.5 mm = 6.75"
- Diameter = 17" + 2 × 6.75" = 30.50"
- Circumference = π × 30.50" = 95.8"
- Revs per mile = 63,360" ÷ 95.8" = 661
Sizes that can replace 245/70R17 on a 17" wheel
Within 3% of 30.50". Last column: speedometer reading at a true 60 mph.
| Size | Diameter | Width | Difference | Speedo at true 60 mph |
|---|---|---|---|---|
| 285/60R17 | 30.46" | 11.22" | -0.13% | 60.1 mph |
| 265/65R17 | 30.56" | 10.43" | +0.2% | 59.9 mph |
| 315/55R17 | 30.64" | 12.40" | +0.46% | 59.7 mph |
| 225/75R17 | 30.29" | 8.86" | -0.69% | 60.4 mph |
| 305/55R17 | 30.21" | 12.01" | -0.95% | 60.6 mph |
| 270/65R17 | 30.82" | 10.63" | +1.05% | 59.4 mph |
| 235/75R17 | 30.88" | 9.25" | +1.25% | 59.3 mph |
| 295/60R17 | 30.94" | 11.61" | +1.44% | 59.1 mph |
| 255/65R17 | 30.05" | 10.04" | -1.48% | 60.9 mph |
| 275/60R17 | 29.99" | 10.83" | -1.67% | 61 mph |
| 235/70R17 | 29.95" | 9.25" | -1.8% | 61.1 mph |
| 255/70R17 | 31.06" | 10.04" | +1.84% | 58.9 mph |
One size wider or narrower
- Narrower: 235/70R17 — 9.25" wide, 29.95" tall
- Wider: 255/70R17 — 10.04" wide, 31.06" tall
Same height on a different wheel size
- 255/80R14 14" (-1.44%)
- 265/75R15 15" (+0.49%)
- 325/60R15 15" (-0.49%)
- 285/70R15 15" (+0.69%)
- 235/85R15 15" (+0.75%)
- 275/70R15 15" (-1.11%)
- 295/65R15 15" (-1.31%)
- 255/75R15 15" (-1.44%)
- 255/80R15 15" (+1.84%)
- 245/75R16 16" (-0.1%)
Questions about 245/70R17
How tall is a 245/70R17 tire in inches?
A 245/70R17 tire is 30.50 inches (775 mm) tall: the 17-inch rim plus two sidewalls of 6.75 inches each.
Is 245/70R17 a 31 inch tire?
Yes. At 30.50 inches tall it is commonly called a 31-inch tire.
How many revolutions per mile does a 245/70R17 make?
About 661 revolutions per mile, based on a calculated circumference of 95.8 inches.
What size can replace 245/70R17?
285/60R17 is the closest match on a 17" rim (-0.13% height). Check load index, speed rating and clearance first.
Compare 245/70R17 against any other size with the tire size calculator.