42x15.50R22 tire size
42x15.50R22 is a flotation (inch) size: 42.0" tall, 15.5" wide, on a 22" rim — about a 390/65R22. The sidewall is 10.0" and the tire turns 480 times per mile.
42x15.50R22 specs
| Overall diameter (height) | 42.00" · 1067 mm |
|---|---|
| Section width | 15.50" · 394 mm |
| Sidewall height | 10.00" · 254 mm (65% of width) |
| Rim diameter | 22" |
| Circumference | 131.95" · 3.351 m |
| Revolutions per mile | 480 (298 per km) |
| Closest metric size | 390/65R22 |
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 | |
|---|---|---|---|---|---|
| 40x15.50R22 | 40.00" | -4.76% | 0 mm | 57.1 mph | calculate → |
| 42.5x13.50R22 | 42.50" | +1.19% | -51 mm | 60.7 mph | calculate → |
| 41x14.50R22 | 41.00" | -2.38% | -26 mm | 58.6 mph | calculate → |
| 40x14.50R22 | 40.00" | -4.76% | -26 mm | 57.1 mph | calculate → |
Try another size against 42x15.50R22
Questions
What size is 42x15.50R22 in inches?
42x15.50R22 is about 42.0" tall and 15.5" wide on a 22-inch rim — roughly a 390/65R22 in inch sizing.
What does 42x15.50R22 mean?
42" overall diameter, 15.50" section width, radial, 22" rim.
What tire sizes are equivalent to 42x15.50R22?
On the same 22" rim, within 3% of the diameter: 42.5x13.50R22 (+1.19%), 41x14.50R22 (-2.38%), 40x14.50R22 (-4.76%), 40x15.50R22 (-4.76%).
How many revolutions per mile does a 42x15.50R22 tire make?
About 480 revolutions per mile (circumference 131.9").
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.