295/40R21 tire size in inches
A 295/40R21 tire measures
30.3" tall × 11.6" wide
4.65" sidewall on a 21" wheel. 666 revolutions per mile.
295/40R21 means a tire 295 mm wide, with sidewalls 40% as tall as the tire is wide (118 mm), radial construction (R), for a 21 inch wheel.
295/40R21 specs
| Overall diameter (height) | 30.29 inches (769 mm) |
|---|---|
| Section width | 11.61 inches (295 mm) |
| Sidewall height | 4.65 inches (118 mm) |
| Wheel (rim) diameter | 21 inches |
| Circumference | 95.2 inches (2,417 mm) |
| Revolutions per mile | 666 |
| Revolutions per kilometer | 414 |
| Approximate rim width | 9.5" to 11.0" |
| In inches (flotation style) | 30.3x11.6R21 |
| 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 295/40R21 on a 21" wheel
These 21" sizes are within 3% of 295/40R21's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 235/50R21 | 30.25" | 9.25" | −0.1% | 59.9 mph | Compare |
| 335/35R21 | 30.23" | 13.19" | −0.2% | 59.9 mph | Compare |
| 265/45R21 | 30.39" | 10.43" | +0.3% | 60.2 mph | Compare |
| 345/35R21 | 30.51" | 13.58" | +0.7% | 60.4 mph | Compare |
| 255/45R21 | 30.04" | 10.04" | −0.8% | 59.5 mph | Compare |
| 305/40R21 | 30.61" | 12.01" | +1.0% | 60.6 mph | Compare |
| 285/40R21 | 29.98" | 11.22" | −1.0% | 59.4 mph | Compare |
| 325/35R21 | 29.96" | 12.80" | −1.1% | 59.3 mph | Compare |
| 245/50R21 | 30.65" | 9.65" | +1.2% | 60.7 mph | Compare |
| 225/50R21 | 29.86" | 8.86" | −1.4% | 59.1 mph | Compare |
| 225/55R21 | 30.74" | 8.86" | +1.5% | 60.9 mph | Compare |
| 275/45R21 | 30.74" | 10.83" | +1.5% | 60.9 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 225/75R17 | 17" | 30.29" | 0.0% | Compare |
| 265/30R24 | 24" | 30.26" | −0.1% | Compare |
| 235/45R22 | 22" | 30.33" | +0.1% | Compare |
| 285/55R18 | 18" | 30.34" | +0.2% | Compare |
| 265/40R22 | 22" | 30.35" | +0.2% | Compare |
| 325/40R20 | 20" | 30.24" | −0.2% | Compare |
| 285/50R19 | 19" | 30.22" | −0.2% | Compare |
| 305/55R17 | 17" | 30.21" | −0.3% | Compare |
| 315/25R24 | 24" | 30.20" | −0.3% | Compare |
| 355/30R22 | 22" | 30.39" | +0.3% | Compare |
| 215/85R16 | 16" | 30.39" | +0.3% | Compare |
| 245/85R14 | 14" | 30.40" | +0.4% | Compare |
One size up or down
- 285/40R21narrower: 30.0" × 11.2"
- 305/40R21wider: 30.6" × 12.0"
- 295/35R21lower profile: 29.1" × 11.6"
- 295/45R21taller sidewall: 31.5" × 11.6"
Compare 295/40R21 with another size
Questions
- How tall is a 295/40R21 tire?
- A 295/40R21 tire is 30.3 inches tall (769 mm), calculated from the size. It is 11.6 inches wide with 4.6 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 295/40R21 mean?
- 295/40R21 means a tire 295 mm wide, with sidewalls 40% as tall as the tire is wide (118 mm), radial construction (R), for a 21 inch wheel.
- How many revolutions per mile does a 295/40R21 tire make?
- About 666 revolutions per mile, based on a circumference of 95.2 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 295/40R21 tire?
- Roughly 9.5" to 11.0". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 235/50R21 instead of 295/40R21?
- 235/50R21 is −0.04 inches (−0.1%) in overall diameter, so at an indicated 60 mph you would be doing 59.9 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.