255/30R19 tire size in inches
A 255/30R19 tire measures
25.0" tall × 10.0" wide
3.01" sidewall on a 19" wheel. 806 revolutions per mile.
255/30R19 means a tire 255 mm wide, with sidewalls 30% as tall as the tire is wide (77 mm), radial construction (R), for a 19 inch wheel.
255/30R19 specs
| Overall diameter (height) | 25.02 inches (636 mm) |
|---|---|
| Section width | 10.04 inches (255 mm) |
| Sidewall height | 3.01 inches (77 mm) |
| Wheel (rim) diameter | 19 inches |
| Circumference | 78.6 inches (1,997 mm) |
| Revolutions per mile | 806 |
| Revolutions per kilometer | 501 |
| Approximate rim width | 8.5" to 10.0" |
| In inches (flotation style) | 25.0x10.0R19 |
| Aspect ratio | 30% |
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 255/30R19 on a 19" wheel
These 19" sizes are within 3% of 255/30R19's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 305/25R19 | 25.00" | 12.01" | −0.1% | 60.0 mph | Compare |
| 215/35R19 | 24.93" | 8.46" | −0.4% | 59.8 mph | Compare |
| 225/35R19 | 25.20" | 8.86" | +0.7% | 60.4 mph | Compare |
| 315/25R19 | 25.20" | 12.40" | +0.7% | 60.4 mph | Compare |
| 295/25R19 | 24.81" | 11.61" | −0.9% | 59.5 mph | Compare |
| 265/30R19 | 25.26" | 10.43" | +0.9% | 60.6 mph | Compare |
| 245/30R19 | 24.79" | 9.65" | −0.9% | 59.4 mph | Compare |
| 205/35R19 | 24.65" | 8.07" | −1.5% | 59.1 mph | Compare |
| 325/25R19 | 25.40" | 12.80" | +1.5% | 60.9 mph | Compare |
| 285/25R19 | 24.61" | 11.22" | −1.7% | 59.0 mph | Compare |
| 205/40R19 | 25.46" | 8.07" | +1.7% | 61.0 mph | Compare |
| 235/35R19 | 25.48" | 9.25" | +1.8% | 61.1 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 175/80R14 | 14" | 25.02" | 0.0% | Compare |
| 235/65R13 | 13" | 25.03" | 0.0% | Compare |
| 255/35R18 | 18" | 25.03" | 0.0% | Compare |
| 255/25R20 | 20" | 25.02" | 0.0% | Compare |
| 255/40R17 | 17" | 25.03" | 0.0% | Compare |
| 255/45R16 | 16" | 25.04" | 0.0% | Compare |
| 185/55R17 | 17" | 25.01" | 0.0% | Compare |
| 255/50R15 | 15" | 25.04" | +0.1% | Compare |
| 165/85R14 | 14" | 25.04" | +0.1% | Compare |
| 255/55R14 | 14" | 25.04" | +0.1% | Compare |
| 215/65R14 | 14" | 25.00" | −0.1% | Compare |
| 195/65R15 | 15" | 24.98" | −0.2% | Compare |
One size up or down
- 245/30R19narrower: 24.8" × 9.6"
- 265/30R19wider: 25.3" × 10.4"
- 255/25R19lower profile: 24.0" × 10.0"
- 255/35R19taller sidewall: 26.0" × 10.0"
Compare 255/30R19 with another size
Questions
- How tall is a 255/30R19 tire?
- A 255/30R19 tire is 25.0 inches tall (636 mm), calculated from the size. It is 10.0 inches wide with 3.0 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 255/30R19 mean?
- 255/30R19 means a tire 255 mm wide, with sidewalls 30% as tall as the tire is wide (77 mm), radial construction (R), for a 19 inch wheel.
- How many revolutions per mile does a 255/30R19 tire make?
- About 806 revolutions per mile, based on a circumference of 78.6 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 255/30R19 tire?
- Roughly 8.5" to 10.0". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 305/25R19 instead of 255/30R19?
- 305/25R19 is −0.02 inches (−0.1%) in overall diameter, so at an indicated 60 mph you would be doing 60.0 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.