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285/70R17 tire size in inches
285/70R17 is 32.71" tall and 11.22" wide, and fits a 17" rim. In flotation (inch) sizing that is roughly 32.7x11.2R17.
285/70R17 dimensions
| Measurement | Inches | Metric |
|---|---|---|
| Overall diameter (height) | 32.71" | 831 mm |
| Section width | 11.22" | 285 mm |
| Sidewall height | 7.85" | 199.5 mm |
| Rim diameter | 17" | 431.8 mm |
| Circumference | 102.8" | 2610 mm |
| Revolutions per mile | 617 | |
| Aspect ratio | 70% (sidewall is 70% of the width) | |
Drawn to scale
Among the 124 sizes for 17" wheels on this site, 285/70R17 is #85 by height (shortest: 205/40R17, tallest: 385/70R17).
What people compare 285/70R17 with
Real comparisons drivers search for, worked out against 285/70R17:
| Compared size | Height | Width | Sidewall | Speedo at true 60 |
|---|---|---|---|---|
| 265/70R17 | -1.10" (-3.36%) | -0.79" | -0.55" | 62.1 mph |
| 285/75R17 | +1.12" (+3.42%) | 0.00" | +0.57" | 58 mph |
| 295/70R17 | +0.55" (+1.68%) | +0.39" | +0.28" | 59 mph |
| 275/70R17 | -0.55" (-1.68%) | -0.39" | -0.27" | 61 mph |
| 315/70R17 | +1.65" (+5.04%) | +1.18" | +0.83" | 57.1 mph |
| 255/75R17 | -0.65" (-1.99%) | -1.18" | -0.32" | 61.2 mph |
| 305/70R17 | +1.10" (+3.36%) | +0.79" | +0.56" | 58 mph |
| 255/80R17 | +0.35" (+1.07%) | -1.18" | +0.18" | 59.4 mph |
How the 285/70R17 numbers are worked out
The size code reads as 285 mm section width, 70% aspect ratio, R for radial construction and 17-inch wheel.
- Sidewall = 285 × 70% = 199.5 mm = 7.85"
- Diameter = 17" + 2 × 7.85" = 32.71"
- Circumference = π × 32.71" = 102.8"
- Revs per mile = 63,360" ÷ 102.8" = 617
Sizes that can replace 285/70R17 on a 17" wheel
Within 3% of 32.71". Last column: speedometer reading at a true 60 mph.
| Size | Diameter | Width | Difference | Speedo at true 60 mph |
|---|---|---|---|---|
| 235/85R17 | 32.73" | 9.25" | +0.06% | 60 mph |
| 265/75R17 | 32.65" | 10.43" | -0.18% | 60.1 mph |
| 305/65R17 | 32.61" | 12.01" | -0.31% | 60.2 mph |
| 270/75R17 | 32.94" | 10.63" | +0.7% | 59.6 mph |
| 290/70R17 | 32.98" | 11.42" | +0.83% | 59.5 mph |
| 280/70R17 | 32.43" | 11.02" | -0.86% | 60.5 mph |
| 245/80R17 | 32.43" | 9.65" | -0.86% | 60.5 mph |
| 255/80R17 | 33.06" | 10.04" | +1.07% | 59.4 mph |
| 315/65R17 | 33.12" | 12.40" | +1.25% | 59.3 mph |
| 275/75R17 | 33.24" | 10.83" | +1.62% | 59 mph |
| 295/70R17 | 33.26" | 11.61" | +1.68% | 59 mph |
| 275/70R17 | 32.16" | 10.83" | -1.68% | 61 mph |
One size wider or narrower
Same height on a different wheel size
- 265/85R15 15" (+0.09%)
- 295/75R15 15" (-0.89%)
- 305/75R15 15" (+0.92%)
- 315/70R15 15" (-1.07%)
- 255/85R15 15" (-1.96%)
- 265/80R16 16" (-0.06%)
- 305/70R16 16" (+0.31%)
- 285/75R16 16" (+0.37%)
- 280/75R16 16" (-0.52%)
- 245/85R16 16" (-0.95%)
Questions about 285/70R17
How tall is a 285/70R17 tire in inches?
A 285/70R17 tire is 32.71 inches (831 mm) tall: the 17-inch rim plus two sidewalls of 7.85 inches each.
Is 285/70R17 a 33 inch tire?
Yes. At 32.71 inches tall it is commonly called a 33-inch tire.
How many revolutions per mile does a 285/70R17 make?
About 617 revolutions per mile, based on a calculated circumference of 102.8 inches.
What size can replace 285/70R17?
235/85R17 is the closest match on a 17" rim (+0.06% height). Check load index, speed rating and clearance first.
Compare 285/70R17 against any other size with the tire size calculator.