235/70R17 tire size
235/70R17 is a metric size: 30.0" tall, 9.3" wide, on a 17" rim — about a 30x9.50R17. The sidewall is 6.5" and the tire turns 673 times per mile.
235/70R17 specs
| Overall diameter (height) | 29.95" · 761 mm |
|---|---|
| Section width | 9.25" · 235 mm |
| Sidewall height | 6.48" · 165 mm (70% of width) |
| Rim diameter | 17" |
| Circumference | 94.10" · 2.390 m |
| Revolutions per mile | 673 (418 per km) |
| Inch (flotation) equivalent | 30x9.50R17 |
Equivalent sizes on a 17" 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 | |
|---|---|---|---|---|---|
| 225/65R17 common | 28.52" | -4.80% | -10 mm | 57.1 mph | compare → |
| 235/65R17 common | 29.03" | -3.09% | 0 mm | 58.1 mph | compare → |
| 245/65R17 common | 29.54" | -1.38% | +10 mm | 59.2 mph | compare → |
| 245/70R17 common | 30.50" | +1.84% | +10 mm | 61.1 mph | compare → |
| 265/65R17 common | 30.56" | +2.04% | +30 mm | 61.2 mph | compare → |
| 255/65R17 common | 30.05" | +0.33% | +20 mm | 60.2 mph | compare → |
| 255/70R17 common | 31.06" | +3.68% | +20 mm | 62.2 mph | compare → |
| 235/75R17 | 30.88" | +3.09% | 0 mm | 61.9 mph | compare → |
| 255/60R17 | 29.05" | -3.02% | +20 mm | 58.2 mph | compare → |
| 225/75R17 | 30.29" | +1.12% | -10 mm | 60.7 mph | compare → |
| 275/55R17 | 28.91" | -3.48% | +40 mm | 57.9 mph | compare → |
| 275/60R17 | 29.99" | +0.13% | +40 mm | 60.1 mph | calculate → |
| 265/60R17 | 29.52" | -1.45% | +30 mm | 59.1 mph | calculate → |
| 275/65R17 | 31.07" | +3.75% | +40 mm | 62.2 mph | calculate → |
| 215/70R17 | 28.85" | -3.68% | -20 mm | 57.8 mph | calculate → |
| 165/90R17 | 28.69" | -4.21% | -70 mm | 57.5 mph | calculate → |
| 175/90R17 | 29.40" | -1.84% | -60 mm | 58.9 mph | calculate → |
| 315/55R17 | 30.64" | +2.30% | +80 mm | 61.4 mph | calculate → |
| 31x10.50R17 | 31.00" | +3.50% | +32 mm | 62.1 mph | calculate → |
| 285/60R17 | 30.46" | +1.71% | +50 mm | 61.0 mph | calculate → |
| 225/70R17 | 29.40" | -1.84% | -10 mm | 58.9 mph | calculate → |
| 245/60R17 | 28.57" | -4.60% | +10 mm | 57.2 mph | calculate → |
Plus / minus sizing: 16" and 18" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 235/65R18 common | 30.03" | +0.25% | 0 mm | 60.1 mph | compare → |
| 255/70R16 common | 30.06" | +0.34% | +20 mm | 60.2 mph | compare → |
| 255/60R18 | 30.05" | +0.32% | +20 mm | 60.2 mph | compare → |
| 235/75R16 | 29.88" | -0.25% | 0 mm | 59.9 mph | compare → |
| 165/90R18 | 29.69" | -0.87% | -70 mm | 59.5 mph | calculate → |
| 275/55R18 | 29.91" | -0.14% | +40 mm | 59.9 mph | calculate → |
| 30x11.50R16 | 30.00" | +0.16% | +57 mm | 60.1 mph | calculate → |
Try another size against 235/70R17
Questions
What size is 235/70R17 in inches?
235/70R17 is about 30.0" tall and 9.3" wide on a 17-inch rim — roughly a 30x9.50R17 in inch sizing.
What does 235/70R17 mean?
235 mm section width, sidewall 70% of the width (6.48"), radial construction, 17-inch rim.
What tire sizes are equivalent to 235/70R17?
On the same 17" rim, within 3% of the diameter: 275/60R17 (+0.13%), 255/65R17 (+0.33%), 225/75R17 (+1.12%), 245/65R17 (-1.38%), 265/60R17 (-1.45%), 285/60R17 (+1.71%).
How many revolutions per mile does a 235/70R17 tire make?
About 673 revolutions per mile (circumference 94.1").
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.