40x15.50R22 tire size
40x15.50R22 is a flotation (inch) size: 40.0" tall, 15.5" wide, on a 22" rim — about a 390/60R22. The sidewall is 9.0" and the tire turns 504 times per mile.
40x15.50R22 specs
| Overall diameter (height) | 40.00" · 1016 mm |
|---|---|
| Section width | 15.50" · 394 mm |
| Sidewall height | 9.00" · 229 mm (58% of width) |
| Rim diameter | 22" |
| Circumference | 125.66" · 3.192 m |
| Revolutions per mile | 504 (313 per km) |
| Closest metric size | 390/60R22 |
Equivalent sizes on a 22" rim
Sizes within ±5% of the overall diameter. Green rows are inside the usual ±3% limit for keeping the speedometer, ABS and gearing right; red rows are bigger changes that need clearance checks.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 38x13.50R22 | 38.00" | -5.00% | -51 mm | 57.0 mph | calculate → |
| 38x15.50R22 | 38.00" | -5.00% | 0 mm | 57.0 mph | calculate → |
| 40x14.50R22 | 40.00" | 0.00% | -26 mm | 60.0 mph | calculate → |
| 41x14.50R22 | 41.00" | +2.50% | -26 mm | 61.5 mph | calculate → |
| 42x15.50R22 | 42.00" | +5.00% | 0 mm | 63.0 mph | calculate → |
| 355/60R22 | 38.77" | -3.07% | -39 mm | 58.2 mph | calculate → |
Try another size against 40x15.50R22
Questions
What size is 40x15.50R22 in inches?
40x15.50R22 is about 40.0" tall and 15.5" wide on a 22-inch rim — roughly a 390/60R22 in inch sizing.
What does 40x15.50R22 mean?
40" overall diameter, 15.50" section width, radial, 22" rim.
What tire sizes are equivalent to 40x15.50R22?
On the same 22" rim, within 3% of the diameter: 40x14.50R22 (0.00%), 41x14.50R22 (+2.50%), 355/60R22 (-3.07%), 38x13.50R22 (-5.00%), 38x15.50R22 (-5.00%), 42x15.50R22 (+5.00%).
How many revolutions per mile does a 40x15.50R22 tire make?
About 504 revolutions per mile (circumference 125.7").
How these numbers are computed
Diameter = rim + 2 × sidewall, sidewall = width × aspect ÷ 100, circumference = π × diameter, revolutions per mile = 63,360 ÷ circumference. Real tires differ by brand by a few tenths of an inch. Last reviewed October 14, 2026.