38x13.50R20 tire size in inches
A 38x13.50R20 tire measures
38.0" tall × 13.5" wide
9.00" sidewall on a 20" wheel. 531 revolutions per mile.
38x13.50R20 is a flotation (inch) size: 38 inches tall, 13.50 inches wide, for a 20 inch wheel. The R means radial construction.
38x13.50R20 specs
| Overall diameter (height) | 38.00 inches (965 mm) |
|---|---|
| Section width | 13.50 inches (343 mm) |
| Sidewall height | 9.00 inches (229 mm) |
| Wheel (rim) diameter | 20 inches |
| Circumference | 119.4 inches (3,032 mm) |
| Revolutions per mile | 531 |
| Revolutions per kilometer | 330 |
| Approximate rim width | 9.5" to 12.0" |
| Aspect ratio (equivalent) | 67% |
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 38x13.50R20 on a 20" wheel
These 20" sizes are within 3% of 38x13.50R20's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 37x12.50R20 | 37.00" | 12.50" | −2.6% | 58.4 mph | Compare |
| 37x13.50R20 | 37.00" | 13.50" | −2.6% | 58.4 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 37x12.50R17 | 17" | 37.00" | −2.6% | Compare |
| 37x12.50R18 | 18" | 37.00" | −2.6% | Compare |
| 37x13.50R17 | 17" | 37.00" | −2.6% | Compare |
| 37x13.50R18 | 18" | 37.00" | −2.6% | Compare |
| 37x13.50R22 | 22" | 37.00" | −2.6% | Compare |
Compare 38x13.50R20 with another size
Questions
- How tall is a 38x13.50R20 tire?
- A 38x13.50R20 tire is 38.0 inches tall (965 mm), calculated from the size. It is 13.5 inches wide with 9.0 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 38x13.50R20 mean?
- 38x13.50R20 is a flotation (inch) size: 38 inches tall, 13.50 inches wide, for a 20 inch wheel. The R means radial construction.
- How many revolutions per mile does a 38x13.50R20 tire make?
- About 531 revolutions per mile, based on a circumference of 119.4 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 38x13.50R20 tire?
- Roughly 9.5" to 12.0". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 37x12.50R20 instead of 38x13.50R20?
- 37x12.50R20 is −1.00 inches (−2.6%) in overall diameter, so at an indicated 60 mph you would be doing 58.4 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.