42x15.50R26 tire size
42x15.50R26 is a flotation (inch) size: 42.0" tall, 15.5" wide, on a 26" rim — about a 390/50R26. The sidewall is 8.0" and the tire turns 480 times per mile.
42x15.50R26 specs
| Overall diameter (height) | 42.00" · 1067 mm |
|---|---|
| Section width | 15.50" · 394 mm |
| Sidewall height | 8.00" · 203 mm (52% of width) |
| Rim diameter | 26" |
| Circumference | 131.95" · 3.351 m |
| Revolutions per mile | 480 (298 per km) |
| Closest metric size | 390/50R26 |
Try another size against 42x15.50R26
Questions
What size is 42x15.50R26 in inches?
42x15.50R26 is about 42.0" tall and 15.5" wide on a 26-inch rim — roughly a 390/50R26 in inch sizing.
What does 42x15.50R26 mean?
42" overall diameter, 15.50" section width, radial, 26" rim.
What tire sizes are equivalent to 42x15.50R26?
No other common size on a 26" rim comes within 3% of this diameter.
How many revolutions per mile does a 42x15.50R26 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.