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305/70R17 tire size in inches
305/70R17 is 33.81" tall and 12.01" wide, and fits a 17" rim. In flotation (inch) sizing that is roughly 33.8x12.0R17.
305/70R17 dimensions
| Measurement | Inches | Metric |
|---|---|---|
| Overall diameter (height) | 33.81" | 859 mm |
| Section width | 12.01" | 305 mm |
| Sidewall height | 8.41" | 213.5 mm |
| Rim diameter | 17" | 431.8 mm |
| Circumference | 106.2" | 2698 mm |
| Revolutions per mile | 597 | |
| Aspect ratio | 70% (sidewall is 70% of the width) | |
Drawn to scale
Among the 124 sizes for 17" wheels on this site, 305/70R17 is #98 by height (shortest: 205/40R17, tallest: 385/70R17).
What people compare 305/70R17 with
Real comparisons drivers search for, worked out against 305/70R17:
| Compared size | Height | Width | Sidewall | Speedo at true 60 |
|---|---|---|---|---|
| 285/70R17 | -1.10" (-3.25%) | -0.79" | -0.56" | 62 mph |
| 285/75R17 | +0.02" (+0.06%) | -0.79" | +0.01" | 60 mph |
| 315/70R17 | +0.55" (+1.63%) | +0.39" | +0.27" | 59 mph |
| 295/70R17 | -0.55" (-1.63%) | -0.40" | -0.28" | 61 mph |
| 265/70R17 | -2.20" (-6.51%) | -1.58" | -1.11" | 64.2 mph |
How the 305/70R17 numbers are worked out
The size code reads as 305 mm section width, 70% aspect ratio, R for radial construction and 17-inch wheel.
- Sidewall = 305 × 70% = 213.5 mm = 8.41"
- Diameter = 17" + 2 × 8.41" = 33.81"
- Circumference = π × 33.81" = 106.2"
- Revs per mile = 63,360" ÷ 106.2" = 597
Sizes that can replace 305/70R17 on a 17" wheel
Within 3% of 33.81". Last column: speedometer reading at a true 60 mph.
| Size | Diameter | Width | Difference | Speedo at true 60 mph |
|---|---|---|---|---|
| 285/75R17 | 33.83" | 11.22" | +0.06% | 60 mph |
| 265/80R17 | 33.69" | 10.43" | -0.35% | 60.2 mph |
| 325/65R17 | 33.63" | 12.80" | -0.53% | 60.3 mph |
| 255/85R17 | 34.07" | 10.04" | +0.77% | 59.5 mph |
| 280/75R17 | 33.54" | 11.02" | -0.8% | 60.5 mph |
| 300/70R17 | 33.54" | 11.81" | -0.8% | 60.5 mph |
| 245/85R17 | 33.40" | 9.65" | -1.21% | 60.7 mph |
| 275/80R17 | 34.32" | 10.83" | +1.51% | 59.1 mph |
| 315/70R17 | 34.36" | 12.40" | +1.63% | 59 mph |
| 295/70R17 | 33.26" | 11.61" | -1.63% | 61 mph |
| 275/75R17 | 33.24" | 10.83" | -1.69% | 61 mph |
| 295/75R17 | 34.42" | 11.61" | +1.8% | 58.9 mph |
One size wider or narrower
Same height on a different wheel size
- 315/75R15 15" (-0.62%)
- 325/75R15 15" (+1.12%)
- 265/85R16 16" (-0.21%)
- 325/70R16 16" (+0.3%)
- 285/80R16 16" (+0.41%)
- 305/75R16 16" (+0.59%)
- 295/75R16 16" (-1.15%)
- 315/70R16 16" (-1.33%)
- 275/80R16 16" (-1.45%)
- 275/85R16 16" (+1.77%)
Questions about 305/70R17
How tall is a 305/70R17 tire in inches?
A 305/70R17 tire is 33.81 inches (859 mm) tall: the 17-inch rim plus two sidewalls of 8.41 inches each.
Is 305/70R17 a 34 inch tire?
Yes. At 33.81 inches tall it is commonly called a 34-inch tire.
How many revolutions per mile does a 305/70R17 make?
About 597 revolutions per mile, based on a calculated circumference of 106.2 inches.
What size can replace 305/70R17?
285/75R17 is the closest match on a 17" rim (+0.06% height). Check load index, speed rating and clearance first.
Compare 305/70R17 against any other size with the tire size calculator.