265/55R21 tire size in inches
A 265/55R21 tire measures
32.5" tall × 10.4" wide
5.74" sidewall on a 21" wheel. 621 revolutions per mile.
265/55R21 means a tire 265 mm wide, with sidewalls 55% as tall as the tire is wide (146 mm), radial construction (R), for a 21 inch wheel.
265/55R21 specs
| Overall diameter (height) | 32.48 inches (825 mm) |
|---|---|
| Section width | 10.43 inches (265 mm) |
| Sidewall height | 5.74 inches (146 mm) |
| Wheel (rim) diameter | 21 inches |
| Circumference | 102.0 inches (2,591 mm) |
| Revolutions per mile | 621 |
| Revolutions per kilometer | 386 |
| Approximate rim width | 7.5" to 9.0" |
| In inches (flotation style) | 32.5x10.4R21 |
| Aspect ratio | 55% |
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 265/55R21 on a 21" wheel
These 21" sizes are within 3% of 265/55R21's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 325/45R21 | 32.52" | 12.80" | +0.1% | 60.1 mph | Compare |
| 295/50R21 | 32.61" | 11.61" | +0.4% | 60.3 mph | Compare |
| 285/50R21 | 32.22" | 11.22" | −0.8% | 59.5 mph | Compare |
| 355/40R21 | 32.18" | 13.98" | −0.9% | 59.5 mph | Compare |
| 315/45R21 | 32.16" | 12.40" | −1.0% | 59.4 mph | Compare |
| 335/45R21 | 32.87" | 13.19" | +1.2% | 60.7 mph | Compare |
| 255/55R21 | 32.04" | 10.04" | −1.3% | 59.2 mph | Compare |
| 275/55R21 | 32.91" | 10.83" | +1.3% | 60.8 mph | Compare |
| 305/50R21 | 33.01" | 12.01" | +1.6% | 61.0 mph | Compare |
| 345/40R21 | 31.87" | 13.58" | −1.9% | 58.9 mph | Compare |
| 275/50R21 | 31.83" | 10.83" | −2.0% | 58.8 mph | Compare |
| 305/45R21 | 31.81" | 12.01" | −2.1% | 58.8 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 245/75R18 | 18" | 32.47" | 0.0% | Compare |
| 285/60R19 | 19" | 32.46" | 0.0% | Compare |
| 295/45R22 | 22" | 32.45" | −0.1% | Compare |
| 335/55R18 | 18" | 32.51" | +0.1% | Compare |
| 265/50R22 | 22" | 32.43" | −0.1% | Compare |
| 265/60R20 | 20" | 32.52" | +0.1% | Compare |
| 245/65R20 | 20" | 32.54" | +0.2% | Compare |
| 305/60R18 | 18" | 32.41" | −0.2% | Compare |
| 305/35R24 | 24" | 32.41" | −0.2% | Compare |
| 315/50R20 | 20" | 32.40" | −0.2% | Compare |
| 335/40R22 | 22" | 32.55" | +0.2% | Compare |
| 245/85R16 | 16" | 32.40" | −0.2% | Compare |
One size up or down
Compare 265/55R21 with another size
Questions
- How tall is a 265/55R21 tire?
- A 265/55R21 tire is 32.5 inches tall (825 mm), calculated from the size. It is 10.4 inches wide with 5.7 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 265/55R21 mean?
- 265/55R21 means a tire 265 mm wide, with sidewalls 55% as tall as the tire is wide (146 mm), radial construction (R), for a 21 inch wheel.
- How many revolutions per mile does a 265/55R21 tire make?
- About 621 revolutions per mile, based on a circumference of 102.0 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 265/55R21 tire?
- Roughly 7.5" to 9.0". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 325/45R21 instead of 265/55R21?
- 325/45R21 is +0.04 inches (+0.1%) in overall diameter, so at an indicated 60 mph you would be doing 60.1 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.