265/50R21 tire size in inches
A 265/50R21 tire measures
31.4" tall × 10.4" wide
5.22" sidewall on a 21" wheel. 642 revolutions per mile.
265/50R21 means a tire 265 mm wide, with sidewalls 50% as tall as the tire is wide (133 mm), radial construction (R), for a 21 inch wheel.
265/50R21 specs
| Overall diameter (height) | 31.43 inches (798 mm) |
|---|---|
| Section width | 10.43 inches (265 mm) |
| Sidewall height | 5.22 inches (133 mm) |
| Wheel (rim) diameter | 21 inches |
| Circumference | 98.7 inches (2,508 mm) |
| Revolutions per mile | 642 |
| Revolutions per kilometer | 399 |
| Approximate rim width | 7.5" to 9.0" |
| In inches (flotation style) | 31.4x10.4R21 |
| Aspect ratio | 50% |
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 265/50R21 on a 21" wheel
These 21" sizes are within 3% of 265/50R21's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 295/45R21 | 31.45" | 11.61" | +0.1% | 60.0 mph | Compare |
| 335/40R21 | 31.55" | 13.19" | +0.4% | 60.2 mph | Compare |
| 245/55R21 | 31.61" | 9.65" | +0.6% | 60.3 mph | Compare |
| 325/40R21 | 31.24" | 12.80" | −0.6% | 59.6 mph | Compare |
| 235/55R21 | 31.18" | 9.25" | −0.8% | 59.5 mph | Compare |
| 285/45R21 | 31.10" | 11.22" | −1.1% | 59.4 mph | Compare |
| 305/45R21 | 31.81" | 12.01" | +1.2% | 60.7 mph | Compare |
| 275/50R21 | 31.83" | 10.83" | +1.3% | 60.8 mph | Compare |
| 255/50R21 | 31.04" | 10.04" | −1.3% | 59.2 mph | Compare |
| 345/40R21 | 31.87" | 13.58" | +1.4% | 60.8 mph | Compare |
| 315/40R21 | 30.92" | 12.40" | −1.6% | 59.0 mph | Compare |
| 255/55R21 | 32.04" | 10.04" | +1.9% | 61.2 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 245/80R16 | 16" | 31.43" | 0.0% | Compare |
| 315/30R24 | 24" | 31.44" | 0.0% | Compare |
| 305/60R17 | 17" | 31.41" | −0.1% | Compare |
| 285/60R18 | 18" | 31.46" | +0.1% | Compare |
| 315/50R19 | 19" | 31.40" | −0.1% | Compare |
| 245/85R15 | 15" | 31.40" | −0.1% | Compare |
| 245/75R17 | 17" | 31.47" | +0.1% | Compare |
| 265/55R20 | 20" | 31.48" | +0.1% | Compare |
| 265/45R22 | 22" | 31.39" | −0.1% | Compare |
| 245/70R18 | 18" | 31.50" | +0.2% | Compare |
| 345/35R22 | 22" | 31.51" | +0.2% | Compare |
| 225/65R20 | 20" | 31.52" | +0.3% | Compare |
One size up or down
- 255/50R21narrower: 31.0" × 10.0"
- 275/50R21wider: 31.8" × 10.8"
- 265/45R21lower profile: 30.4" × 10.4"
- 265/55R21taller sidewall: 32.5" × 10.4"
Compare 265/50R21 with another size
Questions
- How tall is a 265/50R21 tire?
- A 265/50R21 tire is 31.4 inches tall (798 mm), calculated from the size. It is 10.4 inches wide with 5.2 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 265/50R21 mean?
- 265/50R21 means a tire 265 mm wide, with sidewalls 50% as tall as the tire is wide (133 mm), radial construction (R), for a 21 inch wheel.
- How many revolutions per mile does a 265/50R21 tire make?
- About 642 revolutions per mile, based on a circumference of 98.7 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 265/50R21 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 295/45R21 instead of 265/50R21?
- 295/45R21 is +0.02 inches (+0.1%) in overall diameter, so at an indicated 60 mph you would be doing 60.0 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.