235/85R17 tire size
235/85R17 is a metric size: 32.7" tall, 9.3" wide, on a 17" rim — about a 32.5x9.50R17. The sidewall is 7.9" and the tire turns 616 times per mile.
235/85R17 specs
| Overall diameter (height) | 32.73" · 831 mm |
|---|---|
| Section width | 9.25" · 235 mm |
| Sidewall height | 7.86" · 200 mm (85% of width) |
| Rim diameter | 17" |
| Circumference | 102.82" · 2.612 m |
| Revolutions per mile | 616 (383 per km) |
| Inch (flotation) equivalent | 32.5x9.50R17 |
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 | |
|---|---|---|---|---|---|
| 265/70R17 common | 31.61" | -3.43% | +30 mm | 57.9 mph | calculate → |
| 285/70R17 common | 32.71" | -0.06% | +50 mm | 60.0 mph | calculate → |
| 245/75R17 common | 31.47" | -3.85% | +10 mm | 57.7 mph | calculate → |
| 235/80R17 common | 31.80" | -2.83% | 0 mm | 58.3 mph | calculate → |
| 315/70R17 common | 34.36" | +4.99% | +80 mm | 63.0 mph | calculate → |
| 255/75R17 | 32.06" | -2.04% | +20 mm | 58.8 mph | calculate → |
| 295/70R17 | 33.26" | +1.62% | +60 mm | 61.0 mph | calculate → |
| 285/75R17 | 33.83" | +3.37% | +50 mm | 62.0 mph | calculate → |
| 33x12.50R17 | 33.00" | +0.83% | +83 mm | 60.5 mph | calculate → |
| 275/70R17 | 32.16" | -1.74% | +40 mm | 59.0 mph | calculate → |
| 255/80R17 | 33.06" | +1.02% | +20 mm | 60.6 mph | calculate → |
| 305/70R17 | 33.81" | +3.31% | +70 mm | 62.0 mph | calculate → |
| 305/65R17 | 32.61" | -0.36% | +70 mm | 59.8 mph | calculate → |
| 285/65R17 | 31.59" | -3.49% | +50 mm | 57.9 mph | calculate → |
| 34x10.50R17 | 34.00" | +3.89% | +32 mm | 62.3 mph | calculate → |
| 33x10.50R17 | 33.00" | +0.83% | +32 mm | 60.5 mph | calculate → |
| 33x11.50R17 | 33.00" | +0.83% | +57 mm | 60.5 mph | calculate → |
| 33x13.50R17 | 33.00" | +0.83% | +108 mm | 60.5 mph | calculate → |
| 33x13.00R17 | 33.00" | +0.83% | +95 mm | 60.5 mph | calculate → |
| 33x9.50R17 | 33.00" | +0.83% | +6 mm | 60.5 mph | calculate → |
| 32x11.50R17 | 32.00" | -2.23% | +57 mm | 58.7 mph | calculate → |
| 315/60R17 | 31.88" | -2.59% | +80 mm | 58.4 mph | calculate → |
| 255/85R17 | 34.07" | +4.09% | +20 mm | 62.5 mph | calculate → |
| 275/80R17 | 34.32" | +4.87% | +40 mm | 62.9 mph | calculate → |
| 32x10.50R17 | 32.00" | -2.23% | +32 mm | 58.7 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 | |
|---|---|---|---|---|---|
| 265/70R18 common | 32.61" | -0.37% | +30 mm | 59.8 mph | calculate → |
| 285/75R16 common | 32.83" | +0.31% | +50 mm | 60.2 mph | calculate → |
| 285/65R18 common | 32.59" | -0.43% | +50 mm | 59.7 mph | calculate → |
| 305/70R16 | 32.81" | +0.25% | +70 mm | 60.2 mph | calculate → |
| 33x12.50R18 | 33.00" | +0.83% | +83 mm | 60.5 mph | calculate → |
| 305/60R18 | 32.41" | -0.97% | +70 mm | 59.4 mph | calculate → |
| 245/75R18 | 32.47" | -0.79% | +10 mm | 59.5 mph | calculate → |
| 33x10.50R16 | 33.00" | +0.83% | +32 mm | 60.5 mph | calculate → |
| 33x12.50R16 | 33.00" | +0.83% | +83 mm | 60.5 mph | calculate → |
| 33x11.50R16 | 33.00" | +0.83% | +57 mm | 60.5 mph | calculate → |
| 33x13.00R16 | 33.00" | +0.83% | +95 mm | 60.5 mph | calculate → |
| 265/80R16 | 32.69" | -0.11% | +30 mm | 59.9 mph | calculate → |
| 235/80R18 | 32.80" | +0.23% | 0 mm | 60.1 mph | calculate → |
| 33x11.50R18 | 33.00" | +0.83% | +57 mm | 60.5 mph | calculate → |
| 33x13.50R16 | 33.00" | +0.83% | +108 mm | 60.5 mph | calculate → |
| 33x13.50R18 | 33.00" | +0.83% | +108 mm | 60.5 mph | calculate → |
| 33x13.00R18 | 33.00" | +0.83% | +95 mm | 60.5 mph | calculate → |
| 33x14.50R16 | 33.00" | +0.83% | +133 mm | 60.5 mph | calculate → |
| 33x14.00R16 | 33.00" | +0.83% | +121 mm | 60.5 mph | calculate → |
| 33x9.50R16 | 33.00" | +0.83% | +6 mm | 60.5 mph | calculate → |
| 33x10.50R18 | 33.00" | +0.83% | +32 mm | 60.5 mph | calculate → |
Try another size against 235/85R17
Questions
What size is 235/85R17 in inches?
235/85R17 is about 32.7" tall and 9.3" wide on a 17-inch rim — roughly a 32.5x9.50R17 in inch sizing.
What does 235/85R17 mean?
235 mm section width, sidewall 85% of the width (7.86"), radial construction, 17-inch rim.
What tire sizes are equivalent to 235/85R17?
On the same 17" rim, within 3% of the diameter: 285/70R17 (-0.06%), 305/65R17 (-0.36%), 33x10.50R17 (+0.83%), 33x11.50R17 (+0.83%), 33x12.50R17 (+0.83%), 33x13.50R17 (+0.83%).
How many revolutions per mile does a 235/85R17 tire make?
About 616 revolutions per mile (circumference 102.8").
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.