245/50R20 tire size in inches
A 245/50R20 tire measures
29.6" tall × 9.6" wide
4.82" sidewall on a 20" wheel. 680 revolutions per mile.
245/50R20 means a tire 245 mm wide, with sidewalls 50% as tall as the tire is wide (123 mm), radial construction (R), for a 20 inch wheel.
245/50R20 specs
| Overall diameter (height) | 29.65 inches (753 mm) |
|---|---|
| Section width | 9.65 inches (245 mm) |
| Sidewall height | 4.82 inches (123 mm) |
| Wheel (rim) diameter | 20 inches |
| Circumference | 93.1 inches (2,366 mm) |
| Revolutions per mile | 680 |
| Revolutions per kilometer | 423 |
| Approximate rim width | 7.0" to 8.5" |
| In inches (flotation style) | 29.6x9.6R20 |
| 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 245/50R20 on a 20" wheel
These 20" sizes are within 3% of 245/50R20's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 305/40R20 | 29.61" | 12.01" | −0.1% | 59.9 mph | Compare |
| 225/55R20 | 29.74" | 8.86" | +0.3% | 60.2 mph | Compare |
| 275/45R20 | 29.74" | 10.83" | +0.3% | 60.2 mph | Compare |
| 355/35R20 | 29.78" | 13.98" | +0.5% | 60.3 mph | Compare |
| 345/35R20 | 29.51" | 13.58" | −0.5% | 59.7 mph | Compare |
| 265/45R20 | 29.39" | 10.43" | −0.9% | 59.5 mph | Compare |
| 315/40R20 | 29.92" | 12.40" | +0.9% | 60.6 mph | Compare |
| 215/55R20 | 29.31" | 8.46" | −1.1% | 59.3 mph | Compare |
| 295/40R20 | 29.29" | 11.61" | −1.2% | 59.3 mph | Compare |
| 255/50R20 | 30.04" | 10.04" | +1.3% | 60.8 mph | Compare |
| 235/50R20 | 29.25" | 9.25" | −1.3% | 59.2 mph | Compare |
| 335/35R20 | 29.23" | 13.19" | −1.4% | 59.2 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 265/75R14 | 14" | 29.65" | 0.0% | Compare |
| 275/40R21 | 21" | 29.66" | +0.1% | Compare |
| 225/60R19 | 19" | 29.63" | −0.1% | Compare |
| 295/50R18 | 18" | 29.61" | −0.1% | Compare |
| 325/30R22 | 22" | 29.68" | +0.1% | Compare |
| 245/45R21 | 21" | 29.68" | +0.1% | Compare |
| 315/35R21 | 21" | 29.68" | +0.1% | Compare |
| 245/55R19 | 19" | 29.61" | −0.1% | Compare |
| 285/25R24 | 24" | 29.61" | −0.1% | Compare |
| 265/70R15 | 15" | 29.61" | −0.1% | Compare |
| 215/75R17 | 17" | 29.70" | +0.2% | Compare |
| 285/65R15 | 15" | 29.59" | −0.2% | Compare |
One size up or down
- 235/50R20narrower: 29.3" × 9.3"
- 255/50R20wider: 30.0" × 10.0"
- 245/45R20lower profile: 28.7" × 9.6"
- 245/55R20taller sidewall: 30.6" × 9.6"
Compare 245/50R20 with another size
Questions
- How tall is a 245/50R20 tire?
- A 245/50R20 tire is 29.6 inches tall (753 mm), calculated from the size. It is 9.6 inches wide with 4.8 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 245/50R20 mean?
- 245/50R20 means a tire 245 mm wide, with sidewalls 50% as tall as the tire is wide (123 mm), radial construction (R), for a 20 inch wheel.
- How many revolutions per mile does a 245/50R20 tire make?
- About 680 revolutions per mile, based on a circumference of 93.1 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 245/50R20 tire?
- Roughly 7.0" to 8.5". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 305/40R20 instead of 245/50R20?
- 305/40R20 is −0.04 inches (−0.1%) 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.