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305/70R16 tire size in inches
305/70R16 is 32.81" tall and 12.01" wide, and fits a 16" rim. In flotation (inch) sizing that is roughly 32.8x12.0R16.
305/70R16 dimensions
| Measurement | Inches | Metric |
|---|---|---|
| Overall diameter (height) | 32.81" | 833 mm |
| Section width | 12.01" | 305 mm |
| Sidewall height | 8.41" | 213.5 mm |
| Rim diameter | 16" | 406.4 mm |
| Circumference | 103.1" | 2618 mm |
| Revolutions per mile | 615 | |
| Aspect ratio | 70% (sidewall is 70% of the width) | |
Drawn to scale
Among the 102 sizes for 16" wheels on this site, 305/70R16 is #74 by height (shortest: 205/50R16, tallest: 385/75R16).
What people compare 305/70R16 with
Real comparisons drivers search for, worked out against 305/70R16:
| Compared size | Height | Width | Sidewall | Speedo at true 60 |
|---|---|---|---|---|
| 285/75R16 | +0.02" (+0.06%) | -0.79" | +0.01" | 60 mph |
| 315/75R16 | +1.79" (+5.46%) | +0.39" | +0.89" | 56.9 mph |
| 265/75R16 | -1.16" (-3.54%) | -1.58" | -0.59" | 62.2 mph |
| 295/75R16 | +0.61" (+1.86%) | -0.40" | +0.30" | 58.9 mph |
How the 305/70R16 numbers are worked out
The size code reads as 305 mm section width, 70% aspect ratio, R for radial construction and 16-inch wheel.
- Sidewall = 305 × 70% = 213.5 mm = 8.41"
- Diameter = 16" + 2 × 8.41" = 32.81"
- Circumference = π × 32.81" = 103.1"
- Revs per mile = 63,360" ÷ 103.1" = 615
Sizes that can replace 305/70R16 on a 16" wheel
Within 3% of 32.81". Last column: speedometer reading at a true 60 mph.
| Size | Diameter | Width | Difference | Speedo at true 60 mph |
|---|---|---|---|---|
| 285/75R16 | 32.83" | 11.22" | +0.06% | 60 mph |
| 265/80R16 | 32.69" | 10.43" | -0.37% | 60.2 mph |
| 255/85R16 | 33.07" | 10.04" | +0.79% | 59.5 mph |
| 280/75R16 | 32.54" | 11.02" | -0.82% | 60.5 mph |
| 245/85R16 | 32.40" | 9.65" | -1.25% | 60.8 mph |
| 275/80R16 | 33.32" | 10.83" | +1.55% | 59.1 mph |
| 315/70R16 | 33.36" | 12.40" | +1.68% | 59 mph |
| 295/70R16 | 32.26" | 11.61" | -1.68% | 61 mph |
| 275/75R16 | 32.24" | 10.83" | -1.74% | 61.1 mph |
| 375/55R16 | 32.24" | 14.76" | -1.74% | 61.1 mph |
| 295/75R16 | 33.42" | 11.61" | +1.86% | 58.9 mph |
| 315/65R16 | 32.12" | 12.40" | -2.1% | 61.3 mph |
One size wider or narrower
- Narrower: 295/70R16 — 11.61" wide, 32.26" tall
- Wider: 315/70R16 — 12.40" wide, 33.36" tall
Same height on a different wheel size
- 265/85R15 15" (-0.21%)
- 305/75R15 15" (+0.61%)
- 295/75R15 15" (-1.19%)
- 315/70R15 15" (-1.37%)
- 235/85R17 17" (-0.24%)
- 285/70R17 17" (-0.3%)
- 270/75R17 17" (+0.4%)
- 265/75R17 17" (-0.49%)
- 290/70R17 17" (+0.52%)
- 305/65R17 17" (-0.61%)
Questions about 305/70R16
How tall is a 305/70R16 tire in inches?
A 305/70R16 tire is 32.81 inches (833 mm) tall: the 16-inch rim plus two sidewalls of 8.41 inches each.
Is 305/70R16 a 33 inch tire?
Yes. At 32.81 inches tall it is commonly called a 33-inch tire.
How many revolutions per mile does a 305/70R16 make?
About 615 revolutions per mile, based on a calculated circumference of 103.1 inches.
What size can replace 305/70R16?
285/75R16 is the closest match on a 16" rim (+0.06% height). Check load index, speed rating and clearance first.
Compare 305/70R16 against any other size with the tire size calculator.