A 265/50R15 tire is 25.4 inches (646 mm) tall and 10.4 inches wide. The sidewall is 50% of the width, 5.2 inches, on a 15-inch wheel, and the tire turns about 793 times per mile.
In flotation terms that is about 25.4x10.4R15. People often call it a 25-inch tire.
The size most often compared with it is 295/50R15, which is 1.2" taller (+4.6%). At an indicated 60 mph you would be doing 62.8 mph on it, more than the 3% change many shops use as a limit.
Sizes near 265/50R15
Same 15" wheel, within 20 mm of width and 10 points of aspect ratio.
Same height on a different wheel
Sizes within 2% of 25.4" on 14" or 16" or 17" wheels.
Speedometer with a different size
Actual speed when the speedometer is calibrated for 265/50R15.
| Speedometer shows | on 295/50R15 | on 245/55R15 | on 275/50R15 |
|---|
| 30 mph | 31.4 mph | 30.2 mph | 30.5 mph |
| 45 mph | 47.1 mph | 45.3 mph | 45.7 mph |
| 60 mph | 62.8 mph | 60.4 mph | 60.9 mph |
| 70 mph | 73.3 mph | 70.5 mph | 71.1 mph |
265/50R15 comparisons