305/70R16 tire size
305/70R16 is a metric size: 32.8" tall, 12.0" wide, on a 16" rim — about a 33x12.00R16. The sidewall is 8.4" and the tire turns 615 times per mile.
305/70R16 specs
| Overall diameter (height) | 32.81" · 833 mm |
|---|---|
| Section width | 12.01" · 305 mm |
| Sidewall height | 8.41" · 214 mm (70% of width) |
| Rim diameter | 16" |
| Circumference | 103.08" · 2.618 m |
| Revolutions per mile | 615 (382 per km) |
| Inch (flotation) equivalent | 33x12.00R16 |
Equivalent sizes on a 16" rim
Sizes within ±5% of the overall diameter. Green rows are inside the usual ±3% limit for keeping the speedometer, ABS and gearing right; red rows are bigger changes that need clearance checks.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 265/75R16 common | 31.65" | -3.54% | -40 mm | 57.9 mph | compare → |
| 235/85R16 common | 31.73" | -3.30% | -70 mm | 58.0 mph | compare → |
| 285/75R16 common | 32.83" | +0.06% | -20 mm | 60.0 mph | compare → |
| 255/85R16 | 33.07" | +0.78% | -50 mm | 60.5 mph | compare → |
| 295/75R16 | 33.42" | +1.86% | -10 mm | 61.1 mph | calculate → |
| 33x10.50R16 | 33.00" | +0.58% | -38 mm | 60.3 mph | calculate → |
| 33x12.50R16 | 33.00" | +0.58% | +13 mm | 60.3 mph | calculate → |
| 33x11.50R16 | 33.00" | +0.58% | -13 mm | 60.3 mph | calculate → |
| 33x13.00R16 | 33.00" | +0.58% | +25 mm | 60.3 mph | calculate → |
| 32x11.50R16 | 32.00" | -2.47% | -13 mm | 58.5 mph | calculate → |
| 285/70R16 | 31.71" | -3.36% | -20 mm | 58.0 mph | calculate → |
| 265/80R16 | 32.69" | -0.36% | -40 mm | 59.8 mph | calculate → |
| 33x13.50R16 | 33.00" | +0.58% | +38 mm | 60.3 mph | calculate → |
| 33x14.50R16 | 33.00" | +0.58% | +63 mm | 60.3 mph | calculate → |
| 33x14.00R16 | 33.00" | +0.58% | +51 mm | 60.3 mph | calculate → |
| 33x9.50R16 | 33.00" | +0.58% | -64 mm | 60.3 mph | calculate → |
| 33.5x16.50R16 | 33.50" | +2.10% | +114 mm | 61.3 mph | calculate → |
| 32x10.00R16 | 32.00" | -2.47% | -51 mm | 58.5 mph | calculate → |
| 32x9.00R16 | 32.00" | -2.47% | -76 mm | 58.5 mph | calculate → |
| 225/90R16 | 31.94" | -2.64% | -80 mm | 58.4 mph | calculate → |
| 34x10.50R16 | 34.00" | +3.62% | -38 mm | 62.2 mph | calculate → |
| 34x12.50R16 | 34.00" | +3.62% | +13 mm | 62.2 mph | calculate → |
| 34x13.50R16 | 34.00" | +3.62% | +38 mm | 62.2 mph | calculate → |
| 34x9.00R16 | 34.00" | +3.62% | -76 mm | 62.2 mph | calculate → |
Plus / minus sizing: 15" and 17" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 285/70R17 common | 32.71" | -0.31% | -20 mm | 59.8 mph | compare → |
| 33x12.50R15 | 33.00" | +0.58% | +13 mm | 60.3 mph | compare → |
| 33x12.50R17 | 33.00" | +0.58% | +13 mm | 60.3 mph | compare → |
| 255/80R17 | 33.06" | +0.77% | -50 mm | 60.5 mph | compare → |
| 33x10.50R15 | 33.00" | +0.58% | -38 mm | 60.3 mph | compare → |
| 305/65R17 | 32.61" | -0.61% | 0 mm | 59.6 mph | compare → |
| 33x13.50R15 | 33.00" | +0.58% | +38 mm | 60.3 mph | calculate → |
| 33x14.50R15 | 33.00" | +0.58% | +63 mm | 60.3 mph | calculate → |
| 33x10.50R17 | 33.00" | +0.58% | -38 mm | 60.3 mph | calculate → |
| 33x11.50R15 | 33.00" | +0.58% | -13 mm | 60.3 mph | calculate → |
| 33x11.50R17 | 33.00" | +0.58% | -13 mm | 60.3 mph | calculate → |
| 33x13.50R17 | 33.00" | +0.58% | +38 mm | 60.3 mph | calculate → |
| 33x13.00R15 | 33.00" | +0.58% | +25 mm | 60.3 mph | calculate → |
| 33x13.00R17 | 33.00" | +0.58% | +25 mm | 60.3 mph | calculate → |
| 33x14.00R15 | 33.00" | +0.58% | +51 mm | 60.3 mph | calculate → |
| 33x15.50R15 | 33.00" | +0.58% | +89 mm | 60.3 mph | calculate → |
| 33x16.50R15 | 33.00" | +0.58% | +114 mm | 60.3 mph | calculate → |
| 33x22.00R15 | 33.00" | +0.58% | +254 mm | 60.3 mph | calculate → |
| 33x9.50R15 | 33.00" | +0.58% | -64 mm | 60.3 mph | calculate → |
| 33x9.50R17 | 33.00" | +0.58% | -64 mm | 60.3 mph | calculate → |
| 235/85R17 | 32.73" | -0.25% | -70 mm | 59.8 mph | calculate → |
| 33x19.50R15 | 33.00" | +0.58% | +190 mm | 60.3 mph | calculate → |
| 33x21.50R15 | 33.00" | +0.58% | +241 mm | 60.3 mph | calculate → |
| 33x9.00R15 | 33.00" | +0.58% | -76 mm | 60.3 mph | calculate → |
Try another size against 305/70R16
Questions
What size is 305/70R16 in inches?
305/70R16 is about 32.8" tall and 12.0" wide on a 16-inch rim — roughly a 33x12.00R16 in inch sizing.
What does 305/70R16 mean?
305 mm section width, sidewall 70% of the width (8.41"), radial construction, 16-inch rim.
What tire sizes are equivalent to 305/70R16?
On the same 16" rim, within 3% of the diameter: 285/75R16 (+0.06%), 265/80R16 (-0.36%), 33x10.50R16 (+0.58%), 33x11.50R16 (+0.58%), 33x12.50R16 (+0.58%), 33x13.50R16 (+0.58%).
How many revolutions per mile does a 305/70R16 tire make?
About 615 revolutions per mile (circumference 103.1").
How these numbers are computed
Diameter = rim + 2 × sidewall, sidewall = width × aspect ÷ 100, circumference = π × diameter, revolutions per mile = 63,360 ÷ circumference. Real tires differ by brand by a few tenths of an inch. Last reviewed October 14, 2026.