40x15.50R20 tire size in inches
A 40x15.50R20 tire measures
40.0" tall × 15.5" wide
10.00" sidewall on a 20" wheel. 504 revolutions per mile.
40x15.50R20 is a flotation (inch) size: 40 inches tall, 15.50 inches wide, for a 20 inch wheel. The R means radial construction.
40x15.50R20 specs
| Overall diameter (height) | 40.00 inches (1,016 mm) |
|---|---|
| Section width | 15.50 inches (394 mm) |
| Sidewall height | 10.00 inches (254 mm) |
| Wheel (rim) diameter | 20 inches |
| Circumference | 125.7 inches (3,192 mm) |
| Revolutions per mile | 504 |
| Revolutions per kilometer | 313 |
| Approximate rim width | 11.0" to 13.5" |
| Aspect ratio (equivalent) | 65% |
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 40x15.50R20 on a 20" wheel
These 20" sizes are within 3% of 40x15.50R20's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 40x13.50R20 | 40.00" | 13.50" | 0.0% | 60.0 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 40x15.50R22 | 22" | 40.00" | 0.0% | Compare |
Compare 40x15.50R20 with another size
Questions
- How tall is a 40x15.50R20 tire?
- A 40x15.50R20 tire is 40.0 inches tall (1,016 mm), calculated from the size. It is 15.5 inches wide with 10.0 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 40x15.50R20 mean?
- 40x15.50R20 is a flotation (inch) size: 40 inches tall, 15.50 inches wide, for a 20 inch wheel. The R means radial construction.
- How many revolutions per mile does a 40x15.50R20 tire make?
- About 504 revolutions per mile, based on a circumference of 125.7 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 40x15.50R20 tire?
- Roughly 11.0" to 13.5". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 40x13.50R20 instead of 40x15.50R20?
- 40x13.50R20 is 0.00 inches (0.0%) 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.