305/40R22 tire size in inches
A 305/40R22 tire measures
31.6" tall × 12.0" wide
4.80" sidewall on a 22" wheel. 638 revolutions per mile.
305/40R22 means a tire 305 mm wide, with sidewalls 40% as tall as the tire is wide (122 mm), radial construction (R), for a 22 inch wheel.
305/40R22 specs
| Overall diameter (height) | 31.61 inches (803 mm) |
|---|---|
| Section width | 12.01 inches (305 mm) |
| Sidewall height | 4.80 inches (122 mm) |
| Wheel (rim) diameter | 22 inches |
| Circumference | 99.3 inches (2,522 mm) |
| Revolutions per mile | 638 |
| Revolutions per kilometer | 396 |
| Approximate rim width | 10.0" to 11.5" |
| In inches (flotation style) | 31.6x12.0R22 |
| Aspect ratio | 40% |
Calculated from the size. Real tires differ by brand, model and tread depth, typically by a few tenths of an inch.
Sizes that can replace 305/40R22 on a 22" wheel
These 22" sizes are within 3% of 305/40R22's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 245/50R22 | 31.65" | 9.65" | +0.1% | 60.1 mph | Compare |
| 345/35R22 | 31.51" | 13.58" | −0.3% | 59.8 mph | Compare |
| 275/45R22 | 31.74" | 10.83" | +0.4% | 60.3 mph | Compare |
| 355/35R22 | 31.78" | 13.98" | +0.6% | 60.3 mph | Compare |
| 265/45R22 | 31.39" | 10.43" | −0.7% | 59.6 mph | Compare |
| 295/40R22 | 31.29" | 11.61" | −1.0% | 59.4 mph | Compare |
| 315/40R22 | 31.92" | 12.40" | +1.0% | 60.6 mph | Compare |
| 235/50R22 | 31.25" | 9.25" | −1.1% | 59.3 mph | Compare |
| 335/35R22 | 31.23" | 13.19" | −1.2% | 59.3 mph | Compare |
| 255/50R22 | 32.04" | 10.04" | +1.4% | 60.8 mph | Compare |
| 285/45R22 | 32.10" | 11.22" | +1.6% | 60.9 mph | Compare |
| 235/55R22 | 32.18" | 9.25" | +1.8% | 61.1 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 265/70R17 | 17" | 31.61" | 0.0% | Compare |
| 245/55R21 | 21" | 31.61" | 0.0% | Compare |
| 295/50R20 | 20" | 31.61" | 0.0% | Compare |
| 285/65R17 | 17" | 31.59" | −0.1% | Compare |
| 275/35R24 | 24" | 31.58" | −0.1% | Compare |
| 355/45R19 | 19" | 31.58" | −0.1% | Compare |
| 245/60R20 | 20" | 31.57" | −0.1% | Compare |
| 315/55R18 | 18" | 31.64" | +0.1% | Compare |
| 265/75R16 | 16" | 31.65" | +0.1% | Compare |
| 265/65R18 | 18" | 31.56" | −0.1% | Compare |
| 335/40R21 | 21" | 31.55" | −0.2% | Compare |
| 245/65R19 | 19" | 31.54" | −0.2% | Compare |
One size up or down
- 295/40R22narrower: 31.3" × 11.6"
- 315/40R22wider: 31.9" × 12.4"
- 305/35R22lower profile: 30.4" × 12.0"
- 305/45R22taller sidewall: 32.8" × 12.0"
Compare 305/40R22 with another size
Questions
- How tall is a 305/40R22 tire?
- A 305/40R22 tire is 31.6 inches tall (803 mm), calculated from the size. It is 12.0 inches wide with 4.8 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 305/40R22 mean?
- 305/40R22 means a tire 305 mm wide, with sidewalls 40% as tall as the tire is wide (122 mm), radial construction (R), for a 22 inch wheel.
- How many revolutions per mile does a 305/40R22 tire make?
- About 638 revolutions per mile, based on a circumference of 99.3 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 305/40R22 tire?
- Roughly 10.0" to 11.5". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 245/50R22 instead of 305/40R22?
- 245/50R22 is +0.04 inches (+0.1%) in overall diameter, so at an indicated 60 mph you would be doing 60.1 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.