265/30R21 tire size in inches
A 265/30R21 tire measures
27.3" tall × 10.4" wide
3.13" sidewall on a 21" wheel. 740 revolutions per mile.
265/30R21 means a tire 265 mm wide, with sidewalls 30% as tall as the tire is wide (80 mm), radial construction (R), for a 21 inch wheel.
265/30R21 specs
| Overall diameter (height) | 27.26 inches (692 mm) |
|---|---|
| Section width | 10.43 inches (265 mm) |
| Sidewall height | 3.13 inches (80 mm) |
| Wheel (rim) diameter | 21 inches |
| Circumference | 85.6 inches (2,175 mm) |
| Revolutions per mile | 740 |
| Revolutions per kilometer | 460 |
| Approximate rim width | 8.5" to 10.0" |
| In inches (flotation style) | 27.3x10.4R21 |
| Aspect ratio | 30% |
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 265/30R21 on a 21" wheel
These 21" sizes are within 3% of 265/30R21's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 225/35R21 | 27.20" | 8.86" | −0.2% | 59.9 mph | Compare |
| 315/25R21 | 27.20" | 12.40" | −0.2% | 59.9 mph | Compare |
| 325/25R21 | 27.40" | 12.80" | +0.5% | 60.3 mph | Compare |
| 235/35R21 | 27.48" | 9.25" | +0.8% | 60.5 mph | Compare |
| 255/30R21 | 27.02" | 10.04" | −0.9% | 59.5 mph | Compare |
| 275/30R21 | 27.50" | 10.83" | +0.9% | 60.5 mph | Compare |
| 305/25R21 | 27.00" | 12.01" | −0.9% | 59.4 mph | Compare |
| 335/25R21 | 27.59" | 13.19" | +1.2% | 60.7 mph | Compare |
| 295/25R21 | 26.81" | 11.61" | −1.7% | 59.0 mph | Compare |
| 285/30R21 | 27.73" | 11.22" | +1.7% | 61.0 mph | Compare |
| 245/30R21 | 26.79" | 9.65" | −1.7% | 59.0 mph | Compare |
| 245/35R21 | 27.75" | 9.65" | +1.8% | 61.1 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 235/50R18 | 18" | 27.25" | 0.0% | Compare |
| 195/80R15 | 15" | 27.28" | +0.1% | Compare |
| 225/75R14 | 14" | 27.29" | +0.1% | Compare |
| 335/35R18 | 18" | 27.23" | −0.1% | Compare |
| 295/40R18 | 18" | 27.29" | +0.1% | Compare |
| 205/70R16 | 16" | 27.30" | +0.1% | Compare |
| 285/50R16 | 16" | 27.22" | −0.1% | Compare |
| 265/35R20 | 20" | 27.30" | +0.2% | Compare |
| 265/25R22 | 22" | 27.22" | −0.2% | Compare |
| 195/60R18 | 18" | 27.21" | −0.2% | Compare |
| 215/55R18 | 18" | 27.31" | +0.2% | Compare |
| 305/30R20 | 20" | 27.20" | −0.2% | Compare |
One size up or down
- 255/30R21narrower: 27.0" × 10.0"
- 275/30R21wider: 27.5" × 10.8"
- 265/25R21lower profile: 26.2" × 10.4"
- 265/35R21taller sidewall: 28.3" × 10.4"
Compare 265/30R21 with another size
Questions
- How tall is a 265/30R21 tire?
- A 265/30R21 tire is 27.3 inches tall (692 mm), calculated from the size. It is 10.4 inches wide with 3.1 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 265/30R21 mean?
- 265/30R21 means a tire 265 mm wide, with sidewalls 30% as tall as the tire is wide (80 mm), radial construction (R), for a 21 inch wheel.
- How many revolutions per mile does a 265/30R21 tire make?
- About 740 revolutions per mile, based on a circumference of 85.6 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 265/30R21 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 225/35R21 instead of 265/30R21?
- 225/35R21 is −0.06 inches (−0.2%) 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.