315/50R20 tire size in inches
A 315/50R20 tire measures
32.4" tall × 12.4" wide
6.20" sidewall on a 20" wheel. 622 revolutions per mile.
315/50R20 means a tire 315 mm wide, with sidewalls 50% as tall as the tire is wide (158 mm), radial construction (R), for a 20 inch wheel.
315/50R20 specs
| Overall diameter (height) | 32.40 inches (823 mm) |
|---|---|
| Section width | 12.40 inches (315 mm) |
| Sidewall height | 6.20 inches (158 mm) |
| Wheel (rim) diameter | 20 inches |
| Circumference | 101.8 inches (2,586 mm) |
| Revolutions per mile | 622 |
| Revolutions per kilometer | 387 |
| Approximate rim width | 9.0" to 10.5" |
| In inches (flotation style) | 32.4x12.4R20 |
| 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 315/50R20 on a 20" wheel
These 20" sizes are within 3% of 315/50R20's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 285/55R20 | 32.34" | 11.22" | −0.2% | 59.9 mph | Compare |
| 265/60R20 | 32.52" | 10.43" | +0.4% | 60.2 mph | Compare |
| 245/65R20 | 32.54" | 9.65" | +0.4% | 60.3 mph | Compare |
| 355/45R20 | 32.58" | 13.98" | +0.5% | 60.3 mph | Compare |
| 345/45R20 | 32.22" | 13.58" | −0.5% | 59.7 mph | Compare |
| 255/60R20 | 32.05" | 10.04" | −1.1% | 59.3 mph | Compare |
| 235/65R20 | 32.03" | 9.25" | −1.2% | 59.3 mph | Compare |
| 295/55R20 | 32.78" | 11.61" | +1.2% | 60.7 mph | Compare |
| 305/50R20 | 32.01" | 12.01" | −1.2% | 59.3 mph | Compare |
| 325/50R20 | 32.80" | 12.80" | +1.2% | 60.7 mph | Compare |
| 275/55R20 | 31.91" | 10.83" | −1.5% | 59.1 mph | Compare |
| 335/45R20 | 31.87" | 13.19" | −1.6% | 59.0 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 245/85R16 | 16" | 32.40" | 0.0% | Compare |
| 305/35R24 | 24" | 32.41" | 0.0% | Compare |
| 305/60R18 | 18" | 32.41" | 0.0% | Compare |
| 355/30R24 | 24" | 32.39" | 0.0% | Compare |
| 265/50R22 | 22" | 32.43" | +0.1% | Compare |
| 295/45R22 | 22" | 32.45" | +0.2% | Compare |
| 265/40R24 | 24" | 32.35" | −0.2% | Compare |
| 285/60R19 | 19" | 32.46" | +0.2% | Compare |
| 245/75R18 | 18" | 32.47" | +0.2% | Compare |
| 265/55R21 | 21" | 32.48" | +0.2% | Compare |
| 275/80R15 | 15" | 32.32" | −0.2% | Compare |
| 335/55R18 | 18" | 32.51" | +0.3% | Compare |
One size up or down
- 305/50R20narrower: 32.0" × 12.0"
- 325/50R20wider: 32.8" × 12.8"
- 315/45R20lower profile: 31.2" × 12.4"
- 315/55R20taller sidewall: 33.6" × 12.4"
Compare 315/50R20 with another size
Questions
- How tall is a 315/50R20 tire?
- A 315/50R20 tire is 32.4 inches tall (823 mm), calculated from the size. It is 12.4 inches wide with 6.2 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 315/50R20 mean?
- 315/50R20 means a tire 315 mm wide, with sidewalls 50% as tall as the tire is wide (158 mm), radial construction (R), for a 20 inch wheel.
- How many revolutions per mile does a 315/50R20 tire make?
- About 622 revolutions per mile, based on a circumference of 101.8 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 315/50R20 tire?
- Roughly 9.0" to 10.5". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 285/55R20 instead of 315/50R20?
- 285/55R20 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.