255/30R22 tire size
255/30R22 is a metric size: 28.0" tall, 10.0" wide, on a 22" rim — about a 28x10.00R22. The sidewall is 3.0" and the tire turns 720 times per mile.
255/30R22 specs
| Overall diameter (height) | 28.02" · 712 mm |
|---|---|
| Section width | 10.04" · 255 mm |
| Sidewall height | 3.01" · 77 mm (30% of width) |
| Rim diameter | 22" |
| Circumference | 88.04" · 2.236 m |
| Revolutions per mile | 720 (447 per km) |
| Inch (flotation) equivalent | 28x10.00R22 |
Equivalent sizes on a 22" 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 | |
|---|---|---|---|---|---|
| 265/35R22 | 29.30" | +4.57% | +10 mm | 62.7 mph | compare → |
| 285/30R22 | 28.73" | +2.53% | +30 mm | 61.5 mph | compare → |
| 295/30R22 | 28.97" | +3.37% | +40 mm | 62.0 mph | compare → |
| 295/25R22 | 27.81" | -0.77% | +40 mm | 59.5 mph | compare → |
| 265/30R22 | 28.26" | +0.84% | +10 mm | 60.5 mph | compare → |
| 255/35R22 | 29.03" | +3.58% | 0 mm | 62.1 mph | calculate → |
| 245/30R22 | 27.79" | -0.84% | -10 mm | 59.5 mph | calculate → |
| 335/25R22 | 28.59" | +2.04% | +80 mm | 61.2 mph | calculate → |
| 235/30R22 | 27.55" | -1.69% | -20 mm | 59.0 mph | calculate → |
| 315/25R22 | 28.20" | +0.63% | +60 mm | 60.4 mph | calculate → |
| 285/25R22 | 27.61" | -1.48% | +30 mm | 59.1 mph | calculate → |
| 305/25R22 | 28.00" | -0.07% | +50 mm | 60.0 mph | calculate → |
| 275/30R22 | 28.50" | +1.69% | +20 mm | 61.0 mph | calculate → |
| 275/25R22 | 27.41" | -2.18% | +20 mm | 58.7 mph | calculate → |
| 355/25R22 | 28.99" | +3.44% | +100 mm | 62.1 mph | calculate → |
| 305/30R22 | 29.20" | +4.21% | +50 mm | 62.5 mph | calculate → |
Plus / minus sizing: 21" and 23" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 265/35R21 | 28.30" | +1.00% | +10 mm | 60.6 mph | compare → |
| 245/35R21 | 27.75" | -0.97% | -10 mm | 59.4 mph | compare → |
| 255/35R21 | 28.03" | +0.01% | 0 mm | 60.0 mph | compare → |
| 295/30R21 | 27.97" | -0.20% | +40 mm | 59.9 mph | compare → |
| 305/30R21 | 28.20" | +0.65% | +50 mm | 60.4 mph | compare → |
| 355/25R21 | 27.99" | -0.13% | +100 mm | 59.9 mph | calculate → |
| 345/25R21 | 27.79" | -0.83% | +90 mm | 59.5 mph | calculate → |
| 265/25R23 | 28.22" | +0.69% | +10 mm | 60.4 mph | calculate → |
Try another size against 255/30R22
Questions
What size is 255/30R22 in inches?
255/30R22 is about 28.0" tall and 10.0" wide on a 22-inch rim — roughly a 28x10.00R22 in inch sizing.
What does 255/30R22 mean?
255 mm section width, sidewall 30% of the width (3.01"), radial construction, 22-inch rim.
What tire sizes are equivalent to 255/30R22?
On the same 22" rim, within 3% of the diameter: 305/25R22 (-0.07%), 315/25R22 (+0.63%), 295/25R22 (-0.77%), 265/30R22 (+0.84%), 245/30R22 (-0.84%), 285/25R22 (-1.48%).
How many revolutions per mile does a 255/30R22 tire make?
About 720 revolutions per mile (circumference 88.0").
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.