285/40R24 tire size
285/40R24 is a metric size: 33.0" tall, 11.2" wide, on a 24" rim — about a 33x11.00R24. The sidewall is 4.5" and the tire turns 612 times per mile.
285/40R24 specs
| Overall diameter (height) | 32.98" · 838 mm |
|---|---|
| Section width | 11.22" · 285 mm |
| Sidewall height | 4.49" · 114 mm (40% of width) |
| Rim diameter | 24" |
| Circumference | 103.60" · 2.631 m |
| Revolutions per mile | 612 (380 per km) |
| Inch (flotation) equivalent | 33x11.00R24 |
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 | |
|---|---|---|---|---|---|
| 305/35R24 | 32.41" | -1.73% | +20 mm | 59.0 mph | calculate → |
| 295/35R24 | 32.13" | -2.57% | +10 mm | 58.5 mph | calculate → |
| 295/40R24 | 33.29" | +0.96% | +10 mm | 60.6 mph | calculate → |
| 33x13.50R24 | 33.00" | +0.07% | +58 mm | 60.0 mph | calculate → |
| 315/35R24 | 32.68" | -0.90% | +30 mm | 59.5 mph | calculate → |
| 33x14.50R24 | 33.00" | +0.07% | +83 mm | 60.0 mph | calculate → |
Try another size against 285/40R24
Questions
What size is 285/40R24 in inches?
285/40R24 is about 33.0" tall and 11.2" wide on a 24-inch rim — roughly a 33x11.00R24 in inch sizing.
What does 285/40R24 mean?
285 mm section width, sidewall 40% of the width (4.49"), radial construction, 24-inch rim.
What tire sizes are equivalent to 285/40R24?
On the same 24" rim, within 3% of the diameter: 33x13.50R24 (+0.07%), 33x14.50R24 (+0.07%), 315/35R24 (-0.90%), 295/40R24 (+0.96%), 305/35R24 (-1.73%), 295/35R24 (-2.57%).
How many revolutions per mile does a 285/40R24 tire make?
About 612 revolutions per mile (circumference 103.6").
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.