255/50R15 tire size in inches
A 255/50R15 tire measures
25.0" tall × 10.0" wide
5.02" sidewall on a 15" wheel. 805 revolutions per mile.
255/50R15 means a tire 255 mm wide, with sidewalls 50% as tall as the tire is wide (127 mm), radial construction (R), for a 15 inch wheel.
255/50R15 specs
| Overall diameter (height) | 25.04 inches (636 mm) |
|---|---|
| Section width | 10.04 inches (255 mm) |
| Sidewall height | 5.02 inches (127 mm) |
| Wheel (rim) diameter | 15 inches |
| Circumference | 78.7 inches (1,998 mm) |
| Revolutions per mile | 805 |
| Revolutions per kilometer | 500 |
| Approximate rim width | 7.5" to 9.0" |
| In inches (flotation style) | 25.0x10.0R15 |
| Aspect ratio | 50% |
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 255/50R15 on a 15" wheel
These 15" sizes are within 3% of 255/50R15's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 195/65R15 | 24.98" | 7.68" | −0.2% | 59.9 mph | Compare |
| 285/45R15 | 25.10" | 11.22" | +0.2% | 60.1 mph | Compare |
| 215/60R15 | 25.16" | 8.46" | +0.5% | 60.3 mph | Compare |
| 235/55R15 | 25.18" | 9.25" | +0.6% | 60.3 mph | Compare |
| 185/70R15 | 25.20" | 7.28" | +0.6% | 60.4 mph | Compare |
| 165/75R15 | 24.74" | 6.50" | −1.2% | 59.3 mph | Compare |
| 225/55R15 | 24.74" | 8.86" | −1.2% | 59.3 mph | Compare |
| 275/45R15 | 24.74" | 10.83" | −1.2% | 59.3 mph | Compare |
| 175/75R15 | 25.33" | 6.89" | +1.2% | 60.7 mph | Compare |
| 205/60R15 | 24.69" | 8.07" | −1.4% | 59.2 mph | Compare |
| 165/80R15 | 25.39" | 6.50" | +1.4% | 60.8 mph | Compare |
| 175/70R15 | 24.65" | 6.89" | −1.6% | 59.1 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 255/45R16 | 16" | 25.04" | 0.0% | Compare |
| 165/85R14 | 14" | 25.04" | 0.0% | Compare |
| 255/55R14 | 14" | 25.04" | 0.0% | Compare |
| 255/40R17 | 17" | 25.03" | 0.0% | Compare |
| 235/65R13 | 13" | 25.03" | 0.0% | Compare |
| 255/35R18 | 18" | 25.03" | 0.0% | Compare |
| 175/80R14 | 14" | 25.02" | −0.1% | Compare |
| 255/30R19 | 19" | 25.02" | −0.1% | Compare |
| 255/25R20 | 20" | 25.02" | −0.1% | Compare |
| 185/55R17 | 17" | 25.01" | −0.1% | Compare |
| 205/50R17 | 17" | 25.07" | +0.1% | Compare |
| 215/65R14 | 14" | 25.00" | −0.1% | Compare |
One size up or down
- 245/50R15narrower: 24.6" × 9.6"
- 265/50R15wider: 25.4" × 10.4"
- 255/45R15lower profile: 24.0" × 10.0"
- 255/55R15taller sidewall: 26.0" × 10.0"
Compare 255/50R15 with another size
Questions
- How tall is a 255/50R15 tire?
- A 255/50R15 tire is 25.0 inches tall (636 mm), calculated from the size. It is 10.0 inches wide with 5.0 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 255/50R15 mean?
- 255/50R15 means a tire 255 mm wide, with sidewalls 50% as tall as the tire is wide (127 mm), radial construction (R), for a 15 inch wheel.
- How many revolutions per mile does a 255/50R15 tire make?
- About 805 revolutions per mile, based on a circumference of 78.7 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 255/50R15 tire?
- Roughly 7.5" to 9.0". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 195/65R15 instead of 255/50R15?
- 195/65R15 is −0.06 inches (−0.2%) in overall diameter, so at an indicated 60 mph you would be doing 59.9 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.