255/70R16 tire size
255/70R16 is a metric size: 30.1" tall, 10.0" wide, on a 16" rim — about a 30x10.00R16. The sidewall is 7.0" and the tire turns 671 times per mile.
255/70R16 specs
| Overall diameter (height) | 30.06" · 763 mm |
|---|---|
| Section width | 10.04" · 255 mm |
| Sidewall height | 7.03" · 179 mm (70% of width) |
| Rim diameter | 16" |
| Circumference | 94.42" · 2.398 m |
| Revolutions per mile | 671 (417 per km) |
| Inch (flotation) equivalent | 30x10.00R16 |
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 | |
|---|---|---|---|---|---|
| 245/75R16 common | 30.47" | +1.38% | -10 mm | 60.8 mph | compare → |
| 225/75R16 common | 29.29" | -2.55% | -30 mm | 58.5 mph | compare → |
| 265/70R16 common | 30.61" | +1.83% | +10 mm | 61.1 mph | compare → |
| 235/70R16 common | 28.95" | -3.67% | -20 mm | 57.8 mph | compare → |
| 245/70R16 common | 29.50" | -1.83% | -10 mm | 58.9 mph | compare → |
| 215/85R16 common | 30.39" | +1.11% | -40 mm | 60.7 mph | compare → |
| 235/75R16 | 29.88" | -0.59% | -20 mm | 59.6 mph | compare → |
| 255/65R16 | 29.05" | -3.34% | 0 mm | 58.0 mph | compare → |
| 275/70R16 | 31.16" | +3.67% | +20 mm | 62.2 mph | compare → |
| 235/80R16 | 30.80" | +2.49% | -20 mm | 61.5 mph | calculate → |
| 215/75R16 | 28.70" | -4.52% | -40 mm | 57.3 mph | calculate → |
| 285/65R16 | 30.59" | +1.77% | +30 mm | 61.1 mph | calculate → |
| 31x12.50R16 | 31.00" | +3.14% | +63 mm | 61.9 mph | calculate → |
| 30x11.50R16 | 30.00" | -0.18% | +37 mm | 59.9 mph | calculate → |
| 285/60R16 | 29.46" | -1.96% | +30 mm | 58.8 mph | calculate → |
| 31x10.50R16 | 31.00" | +3.14% | +12 mm | 61.9 mph | calculate → |
| 31x11.50R16 | 31.00" | +3.14% | +37 mm | 61.9 mph | calculate → |
| 31x11.00R16 | 31.00" | +3.14% | +24 mm | 61.9 mph | calculate → |
| 205/80R16 | 28.91" | -3.80% | -50 mm | 57.7 mph | calculate → |
| 225/85R16 | 31.06" | +3.34% | -30 mm | 62.0 mph | calculate → |
| 275/60R16 | 28.99" | -3.54% | +20 mm | 57.9 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 | |
|---|---|---|---|---|---|
| 255/65R17 common | 30.05" | -0.01% | 0 mm | 60.0 mph | compare → |
| 30x9.50R15 | 30.00" | -0.18% | -14 mm | 59.9 mph | compare → |
| 235/70R17 | 29.95" | -0.34% | -20 mm | 59.8 mph | compare → |
| 225/75R17 | 30.29" | +0.77% | -30 mm | 60.5 mph | compare → |
| 275/60R17 | 29.99" | -0.21% | +20 mm | 59.9 mph | calculate → |
| 295/65R15 | 30.10" | +0.14% | +40 mm | 60.1 mph | calculate → |
| 30x11.50R15 | 30.00" | -0.18% | +37 mm | 59.9 mph | calculate → |
| 255/75R15 | 30.06" | +0.01% | 0 mm | 60.0 mph | calculate → |
| 30x10.50R15 | 30.00" | -0.18% | +12 mm | 59.9 mph | calculate → |
| 30x10.00R15 | 30.00" | -0.18% | -1 mm | 59.9 mph | calculate → |
| 30x12.00R15 | 30.00" | -0.18% | +50 mm | 59.9 mph | calculate → |
| 30x9.00R15 | 30.00" | -0.18% | -26 mm | 59.9 mph | calculate → |
| 30x12.50R15 | 30.00" | -0.18% | +63 mm | 59.9 mph | calculate → |
| 30x13.50R15 | 30.00" | -0.18% | +88 mm | 59.9 mph | calculate → |
| 30x7.00R15 | 30.00" | -0.18% | -77 mm | 59.9 mph | calculate → |
| 315/60R15 | 29.88" | -0.58% | +60 mm | 59.7 mph | calculate → |
Try another size against 255/70R16
Questions
What size is 255/70R16 in inches?
255/70R16 is about 30.1" tall and 10.0" wide on a 16-inch rim — roughly a 30x10.00R16 in inch sizing.
What does 255/70R16 mean?
255 mm section width, sidewall 70% of the width (7.03"), radial construction, 16-inch rim.
What tire sizes are equivalent to 255/70R16?
On the same 16" rim, within 3% of the diameter: 30x11.50R16 (-0.18%), 235/75R16 (-0.59%), 215/85R16 (+1.11%), 245/75R16 (+1.38%), 285/65R16 (+1.77%), 265/70R16 (+1.83%).
How many revolutions per mile does a 255/70R16 tire make?
About 671 revolutions per mile (circumference 94.4").
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.