30x9.50R15 tire size in inches
A 30x9.50R15 tire measures
30.0" tall × 9.5" wide
7.50" sidewall on a 15" wheel. 672 revolutions per mile.
30x9.50R15 is a flotation (inch) size: 30 inches tall, 9.50 inches wide, for a 15 inch wheel. The R means radial construction.
30x9.50R15 specs
| Overall diameter (height) | 30.00 inches (762 mm) |
|---|---|
| Section width | 9.50 inches (241 mm) |
| Sidewall height | 7.50 inches (191 mm) |
| Wheel (rim) diameter | 15 inches |
| Circumference | 94.2 inches (2,394 mm) |
| Revolutions per mile | 672 |
| Revolutions per kilometer | 418 |
| Approximate rim width | 6.0" to 8.5" |
| Aspect ratio (equivalent) | 79% |
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 30x9.50R15 on a 15" wheel
These 15" sizes are within 3% of 30x9.50R15's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 225/85R15 | 30.06" | 8.86" | +0.2% | 60.1 mph | Compare |
| 255/75R15 | 30.06" | 10.04" | +0.2% | 60.1 mph | Compare |
| 275/70R15 | 30.16" | 10.83" | +0.5% | 60.3 mph | Compare |
| 235/80R15 | 29.80" | 9.25" | −0.7% | 59.6 mph | Compare |
| 265/70R15 | 29.61" | 10.43" | −1.3% | 59.2 mph | Compare |
| 285/65R15 | 29.59" | 11.22" | −1.4% | 59.2 mph | Compare |
| 245/80R15 | 30.43" | 9.65" | +1.4% | 60.9 mph | Compare |
| 245/75R15 | 29.47" | 9.65" | −1.8% | 58.9 mph | Compare |
| 215/85R15 | 29.39" | 8.46" | −2.0% | 58.8 mph | Compare |
| 265/75R15 | 30.65" | 10.43" | +2.2% | 61.3 mph | Compare |
| 285/70R15 | 30.71" | 11.22" | +2.4% | 61.4 mph | Compare |
| 235/85R15 | 30.73" | 9.25" | +2.4% | 61.5 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 215/65R19 | 19" | 30.00" | 0.0% | Compare |
| 305/25R24 | 24" | 30.00" | 0.0% | Compare |
| 275/60R17 | 17" | 29.99" | 0.0% | Compare |
| 305/50R18 | 18" | 30.01" | 0.0% | Compare |
| 255/30R24 | 24" | 30.02" | +0.1% | Compare |
| 285/40R21 | 21" | 29.98" | −0.1% | Compare |
| 235/65R18 | 18" | 30.03" | +0.1% | Compare |
| 255/40R22 | 22" | 30.03" | +0.1% | Compare |
| 255/45R21 | 21" | 30.04" | +0.1% | Compare |
| 255/50R20 | 20" | 30.04" | +0.1% | Compare |
| 325/35R21 | 21" | 29.96" | −0.1% | Compare |
| 255/55R19 | 19" | 30.04" | +0.1% | Compare |
Compare 30x9.50R15 with another size
Questions
- How tall is a 30x9.50R15 tire?
- A 30x9.50R15 tire is 30.0 inches tall (762 mm), calculated from the size. It is 9.5 inches wide with 7.5 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 30x9.50R15 mean?
- 30x9.50R15 is a flotation (inch) size: 30 inches tall, 9.50 inches wide, for a 15 inch wheel. The R means radial construction.
- How many revolutions per mile does a 30x9.50R15 tire make?
- About 672 revolutions per mile, based on a circumference of 94.2 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 30x9.50R15 tire?
- Roughly 6.0" to 8.5". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 225/85R15 instead of 30x9.50R15?
- 225/85R15 is +0.06 inches (+0.2%) 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.