285/30R24 tire size
285/30R24 is a metric size: 30.7" tall, 11.2" wide, on a 24" rim — about a 30.5x11.00R24. The sidewall is 3.4" and the tire turns 656 times per mile.
285/30R24 specs
| Overall diameter (height) | 30.73" · 781 mm |
|---|---|
| Section width | 11.22" · 285 mm |
| Sidewall height | 3.37" · 86 mm (30% of width) |
| Rim diameter | 24" |
| Circumference | 96.55" · 2.452 m |
| Revolutions per mile | 656 (408 per km) |
| Inch (flotation) equivalent | 30.5x11.00R24 |
Equivalent sizes on a 24" 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 | |
|---|---|---|---|---|---|
| 295/30R24 | 30.97" | +0.77% | +10 mm | 60.5 mph | calculate → |
| 255/30R24 | 30.02" | -2.31% | -30 mm | 58.6 mph | calculate → |
| 275/30R24 | 30.50" | -0.77% | -10 mm | 59.5 mph | calculate → |
Try another size against 285/30R24
Questions
What size is 285/30R24 in inches?
285/30R24 is about 30.7" tall and 11.2" wide on a 24-inch rim — roughly a 30.5x11.00R24 in inch sizing.
What does 285/30R24 mean?
285 mm section width, sidewall 30% of the width (3.37"), radial construction, 24-inch rim.
What tire sizes are equivalent to 285/30R24?
On the same 24" rim, within 3% of the diameter: 275/30R24 (-0.77%), 295/30R24 (+0.77%), 255/30R24 (-2.31%).
How many revolutions per mile does a 285/30R24 tire make?
About 656 revolutions per mile (circumference 96.5").
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.