255/40R24 tire size in inches
A 255/40R24 tire measures
32.0" tall × 10.0" wide
4.02" sidewall on a 24" wheel. 630 revolutions per mile.
255/40R24 means a tire 255 mm wide, with sidewalls 40% as tall as the tire is wide (102 mm), radial construction (R), for a 24 inch wheel.
255/40R24 specs
| Overall diameter (height) | 32.03 inches (814 mm) |
|---|---|
| Section width | 10.04 inches (255 mm) |
| Sidewall height | 4.02 inches (102 mm) |
| Wheel (rim) diameter | 24 inches |
| Circumference | 100.6 inches (2,556 mm) |
| Revolutions per mile | 630 |
| Revolutions per kilometer | 391 |
| Approximate rim width | 8.5" to 10.0" |
| In inches (flotation style) | 32.0x10.0R24 |
| Aspect ratio | 40% |
Calculated from the size. Real tires differ by brand, model and tread depth, typically by a few tenths of an inch.
Sizes that can replace 255/40R24 on a 24" wheel
These 24" sizes are within 3% of 255/40R24's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 295/35R24 | 32.13" | 11.61" | +0.3% | 60.2 mph | Compare |
| 335/30R24 | 31.91" | 13.19" | −0.4% | 59.8 mph | Compare |
| 345/30R24 | 32.15" | 13.58" | +0.4% | 60.2 mph | Compare |
| 285/35R24 | 31.85" | 11.22" | −0.6% | 59.7 mph | Compare |
| 265/40R24 | 32.35" | 10.43" | +1.0% | 60.6 mph | Compare |
| 325/30R24 | 31.68" | 12.80" | −1.1% | 59.3 mph | Compare |
| 355/30R24 | 32.39" | 13.98" | +1.1% | 60.7 mph | Compare |
| 305/35R24 | 32.41" | 12.01" | +1.2% | 60.7 mph | Compare |
| 275/35R24 | 31.58" | 10.83" | −1.4% | 59.2 mph | Compare |
| 315/30R24 | 31.44" | 12.40" | −1.8% | 58.9 mph | Compare |
| 275/40R24 | 32.66" | 10.83" | +2.0% | 61.2 mph | Compare |
| 315/35R24 | 32.68" | 12.40" | +2.0% | 61.2 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 235/65R20 | 20" | 32.03" | 0.0% | Compare |
| 255/50R22 | 22" | 32.04" | 0.0% | Compare |
| 255/55R21 | 21" | 32.04" | 0.0% | Compare |
| 255/60R20 | 20" | 32.05" | 0.0% | Compare |
| 255/65R19 | 19" | 32.05" | +0.1% | Compare |
| 255/70R18 | 18" | 32.06" | +0.1% | Compare |
| 305/50R20 | 20" | 32.01" | −0.1% | Compare |
| 255/75R17 | 17" | 32.06" | +0.1% | Compare |
| 255/80R16 | 16" | 32.06" | +0.1% | Compare |
| 32x11.50R15 | 15" | 32.00" | −0.1% | Compare |
| 255/85R15 | 15" | 32.07" | +0.1% | Compare |
| 275/60R19 | 19" | 31.99" | −0.1% | Compare |
One size up or down
Compare 255/40R24 with another size
Questions
- How tall is a 255/40R24 tire?
- A 255/40R24 tire is 32.0 inches tall (814 mm), calculated from the size. It is 10.0 inches wide with 4.0 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 255/40R24 mean?
- 255/40R24 means a tire 255 mm wide, with sidewalls 40% as tall as the tire is wide (102 mm), radial construction (R), for a 24 inch wheel.
- How many revolutions per mile does a 255/40R24 tire make?
- About 630 revolutions per mile, based on a circumference of 100.6 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 255/40R24 tire?
- Roughly 8.5" to 10.0". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 295/35R24 instead of 255/40R24?
- 295/35R24 is +0.10 inches (+0.3%) in overall diameter, so at an indicated 60 mph you would be doing 60.2 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.