235/50R21 tire size in inches
A 235/50R21 tire measures
30.3" tall × 9.3" wide
4.63" sidewall on a 21" wheel. 667 revolutions per mile.
235/50R21 means a tire 235 mm wide, with sidewalls 50% as tall as the tire is wide (118 mm), radial construction (R), for a 21 inch wheel.
235/50R21 specs
| Overall diameter (height) | 30.25 inches (768 mm) |
|---|---|
| Section width | 9.25 inches (235 mm) |
| Sidewall height | 4.63 inches (118 mm) |
| Wheel (rim) diameter | 21 inches |
| Circumference | 95.0 inches (2,414 mm) |
| Revolutions per mile | 667 |
| Revolutions per kilometer | 414 |
| Approximate rim width | 6.5" to 8.0" |
| In inches (flotation style) | 30.3x9.3R21 |
| 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 235/50R21 on a 21" wheel
These 21" sizes are within 3% of 235/50R21's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 335/35R21 | 30.23" | 13.19" | −0.1% | 60.0 mph | Compare |
| 295/40R21 | 30.29" | 11.61" | +0.1% | 60.1 mph | Compare |
| 265/45R21 | 30.39" | 10.43" | +0.5% | 60.3 mph | Compare |
| 255/45R21 | 30.04" | 10.04" | −0.7% | 59.6 mph | Compare |
| 345/35R21 | 30.51" | 13.58" | +0.8% | 60.5 mph | Compare |
| 285/40R21 | 29.98" | 11.22" | −0.9% | 59.5 mph | Compare |
| 325/35R21 | 29.96" | 12.80" | −1.0% | 59.4 mph | Compare |
| 305/40R21 | 30.61" | 12.01" | +1.2% | 60.7 mph | Compare |
| 225/50R21 | 29.86" | 8.86" | −1.3% | 59.2 mph | Compare |
| 245/50R21 | 30.65" | 9.65" | +1.3% | 60.8 mph | Compare |
| 225/55R21 | 30.74" | 8.86" | +1.6% | 61.0 mph | Compare |
| 275/45R21 | 30.74" | 10.83" | +1.6% | 61.0 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 265/30R24 | 24" | 30.26" | 0.0% | Compare |
| 325/40R20 | 20" | 30.24" | −0.1% | Compare |
| 285/50R19 | 19" | 30.22" | −0.1% | Compare |
| 225/75R17 | 17" | 30.29" | +0.1% | Compare |
| 305/55R17 | 17" | 30.21" | −0.1% | Compare |
| 315/25R24 | 24" | 30.20" | −0.2% | Compare |
| 355/40R19 | 19" | 30.18" | −0.2% | Compare |
| 235/55R20 | 20" | 30.18" | −0.2% | Compare |
| 235/45R22 | 22" | 30.33" | +0.2% | Compare |
| 225/80R16 | 16" | 30.17" | −0.3% | Compare |
| 285/55R18 | 18" | 30.34" | +0.3% | Compare |
| 315/45R19 | 19" | 30.16" | −0.3% | Compare |
One size up or down
- 225/50R21narrower: 29.9" × 8.9"
- 245/50R21wider: 30.6" × 9.6"
- 235/45R21lower profile: 29.3" × 9.3"
- 235/55R21taller sidewall: 31.2" × 9.3"
Compare 235/50R21 with another size
Questions
- How tall is a 235/50R21 tire?
- A 235/50R21 tire is 30.3 inches tall (768 mm), calculated from the size. It is 9.3 inches wide with 4.6 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 235/50R21 mean?
- 235/50R21 means a tire 235 mm wide, with sidewalls 50% as tall as the tire is wide (118 mm), radial construction (R), for a 21 inch wheel.
- How many revolutions per mile does a 235/50R21 tire make?
- About 667 revolutions per mile, based on a circumference of 95.0 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 235/50R21 tire?
- Roughly 6.5" to 8.0". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 335/35R21 instead of 235/50R21?
- 335/35R21 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.