235/35R21 tire size in inches
A 235/35R21 tire measures
27.5" tall × 9.3" wide
3.24" sidewall on a 21" wheel. 734 revolutions per mile.
235/35R21 means a tire 235 mm wide, with sidewalls 35% as tall as the tire is wide (82 mm), radial construction (R), for a 21 inch wheel.
235/35R21 specs
| Overall diameter (height) | 27.48 inches (698 mm) |
|---|---|
| Section width | 9.25 inches (235 mm) |
| Sidewall height | 3.24 inches (82 mm) |
| Wheel (rim) diameter | 21 inches |
| Circumference | 86.3 inches (2,193 mm) |
| Revolutions per mile | 734 |
| Revolutions per kilometer | 456 |
| Approximate rim width | 7.5" to 9.0" |
| In inches (flotation style) | 27.5x9.3R21 |
| Aspect ratio | 35% |
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 235/35R21 on a 21" wheel
These 21" sizes are within 3% of 235/35R21's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 275/30R21 | 27.50" | 10.83" | +0.1% | 60.0 mph | Compare |
| 325/25R21 | 27.40" | 12.80" | −0.3% | 59.8 mph | Compare |
| 335/25R21 | 27.59" | 13.19" | +0.4% | 60.3 mph | Compare |
| 265/30R21 | 27.26" | 10.43" | −0.8% | 59.5 mph | Compare |
| 285/30R21 | 27.73" | 11.22" | +0.9% | 60.6 mph | Compare |
| 225/35R21 | 27.20" | 8.86" | −1.0% | 59.4 mph | Compare |
| 315/25R21 | 27.20" | 12.40" | −1.0% | 59.4 mph | Compare |
| 245/35R21 | 27.75" | 9.65" | +1.0% | 60.6 mph | Compare |
| 345/25R21 | 27.79" | 13.58" | +1.1% | 60.7 mph | Compare |
| 255/30R21 | 27.02" | 10.04" | −1.6% | 59.0 mph | Compare |
| 305/25R21 | 27.00" | 12.01" | −1.7% | 59.0 mph | Compare |
| 295/30R21 | 27.97" | 11.61" | +1.8% | 61.1 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 265/55R16 | 16" | 27.48" | 0.0% | Compare |
| 245/75R13 | 13" | 27.47" | 0.0% | Compare |
| 215/50R19 | 19" | 27.46" | 0.0% | Compare |
| 205/65R17 | 17" | 27.49" | +0.1% | Compare |
| 295/45R17 | 17" | 27.45" | −0.1% | Compare |
| 245/70R14 | 14" | 27.50" | +0.1% | Compare |
| 315/30R20 | 20" | 27.44" | −0.1% | Compare |
| 195/75R16 | 16" | 27.52" | +0.1% | Compare |
| 225/65R16 | 16" | 27.52" | +0.1% | Compare |
| 265/50R17 | 17" | 27.43" | −0.2% | Compare |
| 265/60R15 | 15" | 27.52" | +0.2% | Compare |
| 245/65R15 | 15" | 27.54" | +0.2% | Compare |
One size up or down
- 225/35R21narrower: 27.2" × 8.9"
- 245/35R21wider: 27.8" × 9.6"
- 235/30R21lower profile: 26.6" × 9.3"
- 235/40R21taller sidewall: 28.4" × 9.3"
Compare 235/35R21 with another size
Questions
- How tall is a 235/35R21 tire?
- A 235/35R21 tire is 27.5 inches tall (698 mm), calculated from the size. It is 9.3 inches wide with 3.2 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 235/35R21 mean?
- 235/35R21 means a tire 235 mm wide, with sidewalls 35% as tall as the tire is wide (82 mm), radial construction (R), for a 21 inch wheel.
- How many revolutions per mile does a 235/35R21 tire make?
- About 734 revolutions per mile, based on a circumference of 86.3 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 235/35R21 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 275/30R21 instead of 235/35R21?
- 275/30R21 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.