255/85R16 tire size
255/85R16 is a metric size: 33.1" tall, 10.0" wide, on a 16" rim — about a 33x10.00R16. The sidewall is 8.5" and the tire turns 610 times per mile.
255/85R16 specs
| Overall diameter (height) | 33.07" · 840 mm |
|---|---|
| Section width | 10.04" · 255 mm |
| Sidewall height | 8.53" · 217 mm (85% of width) |
| Rim diameter | 16" |
| Circumference | 103.88" · 2.639 m |
| Revolutions per mile | 610 (379 per km) |
| Inch (flotation) equivalent | 33x10.00R16 |
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" | -4.29% | +10 mm | 57.4 mph | compare → |
| 235/85R16 common | 31.73" | -4.05% | -20 mm | 57.6 mph | compare → |
| 285/75R16 common | 32.83" | -0.71% | +30 mm | 59.6 mph | compare → |
| 315/75R16 | 34.60" | +4.64% | +60 mm | 62.8 mph | compare → |
| 305/70R16 | 32.81" | -0.77% | +50 mm | 59.5 mph | compare → |
| 295/75R16 | 33.42" | +1.07% | +40 mm | 60.6 mph | calculate → |
| 33x10.50R16 | 33.00" | -0.20% | +12 mm | 59.9 mph | calculate → |
| 33x12.50R16 | 33.00" | -0.20% | +63 mm | 59.9 mph | calculate → |
| 33x11.50R16 | 33.00" | -0.20% | +37 mm | 59.9 mph | calculate → |
| 33x13.00R16 | 33.00" | -0.20% | +75 mm | 59.9 mph | calculate → |
| 32x11.50R16 | 32.00" | -3.23% | +37 mm | 58.1 mph | calculate → |
| 285/70R16 | 31.71" | -4.11% | +30 mm | 57.5 mph | calculate → |
| 33x13.50R16 | 33.00" | -0.20% | +88 mm | 59.9 mph | calculate → |
| 33x14.50R16 | 33.00" | -0.20% | +113 mm | 59.9 mph | calculate → |
| 33x14.00R16 | 33.00" | -0.20% | +101 mm | 59.9 mph | calculate → |
| 33x9.50R16 | 33.00" | -0.20% | -14 mm | 59.9 mph | calculate → |
| 265/80R16 | 32.69" | -1.13% | +10 mm | 59.3 mph | calculate → |
| 33.5x16.50R16 | 33.50" | +1.31% | +164 mm | 60.8 mph | calculate → |
| 34x10.50R16 | 34.00" | +2.82% | +12 mm | 61.7 mph | calculate → |
| 34x12.50R16 | 34.00" | +2.82% | +63 mm | 61.7 mph | calculate → |
| 34x13.50R16 | 34.00" | +2.82% | +88 mm | 61.7 mph | calculate → |
| 34x9.00R16 | 34.00" | +2.82% | -26 mm | 61.7 mph | calculate → |
| 32x10.00R16 | 32.00" | -3.23% | -1 mm | 58.1 mph | calculate → |
| 32x9.00R16 | 32.00" | -3.23% | -26 mm | 58.1 mph | calculate → |
| 225/90R16 | 31.94" | -3.39% | -30 mm | 58.0 mph | calculate → |
| 34.5x17.00R16 | 34.50" | +4.33% | +177 mm | 62.6 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 | |
|---|---|---|---|---|---|
| 33x12.50R15 | 33.00" | -0.20% | +63 mm | 59.9 mph | compare → |
| 295/70R17 | 33.26" | +0.58% | +40 mm | 60.4 mph | compare → |
| 33x12.50R17 | 33.00" | -0.20% | +63 mm | 59.9 mph | compare → |
| 255/80R17 | 33.06" | -0.01% | 0 mm | 60.0 mph | compare → |
| 33x10.50R15 | 33.00" | -0.20% | +12 mm | 59.9 mph | compare → |
| 33x13.50R15 | 33.00" | -0.20% | +88 mm | 59.9 mph | calculate → |
| 33x14.50R15 | 33.00" | -0.20% | +113 mm | 59.9 mph | calculate → |
| 33x10.50R17 | 33.00" | -0.20% | +12 mm | 59.9 mph | calculate → |
| 33x11.50R15 | 33.00" | -0.20% | +37 mm | 59.9 mph | calculate → |
| 33x11.50R17 | 33.00" | -0.20% | +37 mm | 59.9 mph | calculate → |
| 33x13.50R17 | 33.00" | -0.20% | +88 mm | 59.9 mph | calculate → |
| 33x13.00R15 | 33.00" | -0.20% | +75 mm | 59.9 mph | calculate → |
| 33x13.00R17 | 33.00" | -0.20% | +75 mm | 59.9 mph | calculate → |
| 33x14.00R15 | 33.00" | -0.20% | +101 mm | 59.9 mph | calculate → |
| 33x15.50R15 | 33.00" | -0.20% | +139 mm | 59.9 mph | calculate → |
| 33x16.50R15 | 33.00" | -0.20% | +164 mm | 59.9 mph | calculate → |
| 33x22.00R15 | 33.00" | -0.20% | +304 mm | 59.9 mph | calculate → |
| 33x9.50R15 | 33.00" | -0.20% | -14 mm | 59.9 mph | calculate → |
| 33x9.50R17 | 33.00" | -0.20% | -14 mm | 59.9 mph | calculate → |
| 33x19.50R15 | 33.00" | -0.20% | +240 mm | 59.9 mph | calculate → |
| 33x21.50R15 | 33.00" | -0.20% | +291 mm | 59.9 mph | calculate → |
| 33x9.00R15 | 33.00" | -0.20% | -26 mm | 59.9 mph | calculate → |
Try another size against 255/85R16
Questions
What size is 255/85R16 in inches?
255/85R16 is about 33.1" tall and 10.0" wide on a 16-inch rim — roughly a 33x10.00R16 in inch sizing.
What does 255/85R16 mean?
255 mm section width, sidewall 85% of the width (8.53"), radial construction, 16-inch rim.
What tire sizes are equivalent to 255/85R16?
On the same 16" rim, within 3% of the diameter: 33x10.50R16 (-0.20%), 33x11.50R16 (-0.20%), 33x12.50R16 (-0.20%), 33x13.50R16 (-0.20%), 33x13.00R16 (-0.20%), 33x14.50R16 (-0.20%).
How many revolutions per mile does a 255/85R16 tire make?
About 610 revolutions per mile (circumference 103.9").
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.