315/40R19 tire size in inches
A 315/40R19 tire measures
28.9" tall × 12.4" wide
4.96" sidewall on a 19" wheel. 697 revolutions per mile.
315/40R19 means a tire 315 mm wide, with sidewalls 40% as tall as the tire is wide (126 mm), radial construction (R), for a 19 inch wheel.
315/40R19 specs
| Overall diameter (height) | 28.92 inches (735 mm) |
|---|---|
| Section width | 12.40 inches (315 mm) |
| Sidewall height | 4.96 inches (126 mm) |
| Wheel (rim) diameter | 19 inches |
| Circumference | 90.9 inches (2,308 mm) |
| Revolutions per mile | 697 |
| Revolutions per kilometer | 433 |
| Approximate rim width | 10.5" to 12.0" |
| In inches (flotation style) | 28.9x12.4R19 |
| 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 315/40R19 on a 19" wheel
These 19" sizes are within 3% of 315/40R19's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 255/50R19 | 29.04" | 10.04" | +0.4% | 60.2 mph | Compare |
| 355/35R19 | 28.78" | 13.98" | −0.5% | 59.7 mph | Compare |
| 225/55R19 | 28.74" | 8.86" | −0.6% | 59.6 mph | Compare |
| 275/45R19 | 28.74" | 10.83" | −0.6% | 59.6 mph | Compare |
| 285/45R19 | 29.10" | 11.22" | +0.6% | 60.4 mph | Compare |
| 205/60R19 | 28.69" | 8.07" | −0.8% | 59.5 mph | Compare |
| 215/60R19 | 29.16" | 8.46" | +0.8% | 60.5 mph | Compare |
| 235/55R19 | 29.18" | 9.25" | +0.9% | 60.5 mph | Compare |
| 245/50R19 | 28.65" | 9.65" | −1.0% | 59.4 mph | Compare |
| 305/40R19 | 28.61" | 12.01" | −1.1% | 59.3 mph | Compare |
| 325/40R19 | 29.24" | 12.80" | +1.1% | 60.7 mph | Compare |
| 345/35R19 | 28.51" | 13.58" | −1.4% | 59.1 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 205/80R16 | 16" | 28.91" | 0.0% | Compare |
| 335/30R21 | 21" | 28.91" | 0.0% | Compare |
| 275/55R17 | 17" | 28.91" | 0.0% | Compare |
| 235/70R16 | 16" | 28.95" | +0.1% | Compare |
| 325/35R20 | 20" | 28.96" | +0.1% | Compare |
| 235/75R15 | 15" | 28.88" | −0.1% | Compare |
| 295/30R22 | 22" | 28.97" | +0.2% | Compare |
| 225/45R21 | 21" | 28.97" | +0.2% | Compare |
| 285/40R20 | 20" | 28.98" | +0.2% | Compare |
| 225/50R20 | 20" | 28.86" | −0.2% | Compare |
| 285/35R21 | 21" | 28.85" | −0.2% | Compare |
| 355/25R22 | 22" | 28.99" | +0.2% | Compare |
One size up or down
- 305/40R19narrower: 28.6" × 12.0"
- 325/40R19wider: 29.2" × 12.8"
- 315/35R19lower profile: 27.7" × 12.4"
- 315/45R19taller sidewall: 30.2" × 12.4"
Compare 315/40R19 with another size
Questions
- How tall is a 315/40R19 tire?
- A 315/40R19 tire is 28.9 inches tall (735 mm), calculated from the size. It is 12.4 inches wide with 5.0 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 315/40R19 mean?
- 315/40R19 means a tire 315 mm wide, with sidewalls 40% as tall as the tire is wide (126 mm), radial construction (R), for a 19 inch wheel.
- How many revolutions per mile does a 315/40R19 tire make?
- About 697 revolutions per mile, based on a circumference of 90.9 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 315/40R19 tire?
- Roughly 10.5" to 12.0". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 255/50R19 instead of 315/40R19?
- 255/50R19 is +0.12 inches (+0.4%) in overall diameter, so at an indicated 60 mph you would be doing 60.2 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.