215/35R18 tire size in inches
A 215/35R18 tire measures
23.9" tall × 8.5" wide
2.96" sidewall on a 18" wheel. 843 revolutions per mile.
215/35R18 means a tire 215 mm wide, with sidewalls 35% as tall as the tire is wide (75 mm), radial construction (R), for a 18 inch wheel.
215/35R18 specs
| Overall diameter (height) | 23.93 inches (608 mm) |
|---|---|
| Section width | 8.46 inches (215 mm) |
| Sidewall height | 2.96 inches (75 mm) |
| Wheel (rim) diameter | 18 inches |
| Circumference | 75.2 inches (1,909 mm) |
| Revolutions per mile | 843 |
| Revolutions per kilometer | 524 |
| Approximate rim width | 7.0" to 8.5" |
| In inches (flotation style) | 23.9x8.5R18 |
| 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 215/35R18 on a 18" wheel
These 18" sizes are within 3% of 215/35R18's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 195/40R18 | 24.14" | 7.68" | +0.9% | 60.5 mph | Compare |
| 205/35R18 | 23.65" | 8.07" | −1.2% | 59.3 mph | Compare |
| 225/35R18 | 24.20" | 8.86" | +1.2% | 60.7 mph | Compare |
| 205/40R18 | 24.46" | 8.07" | +2.2% | 61.3 mph | Compare |
| 195/35R18 | 23.37" | 7.68" | −2.3% | 58.6 mph | Compare |
| 235/35R18 | 24.48" | 9.25" | +2.3% | 61.4 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 185/75R13 | 13" | 23.93" | 0.0% | Compare |
| 195/45R17 | 17" | 23.91" | −0.1% | Compare |
| 175/65R15 | 15" | 23.96" | +0.1% | Compare |
| 205/55R15 | 15" | 23.88" | −0.2% | Compare |
| 225/45R16 | 16" | 23.97" | +0.2% | Compare |
| 195/65R14 | 14" | 23.98" | +0.2% | Compare |
| 225/50R15 | 15" | 23.86" | −0.3% | Compare |
| 215/65R13 | 13" | 24.00" | +0.3% | Compare |
| 205/30R19 | 19" | 23.84" | −0.3% | Compare |
| 185/55R16 | 16" | 24.01" | +0.4% | Compare |
| 255/25R19 | 19" | 24.02" | +0.4% | Compare |
| 175/80R13 | 13" | 24.02" | +0.4% | Compare |
One size up or down
Compare 215/35R18 with another size
Questions
- How tall is a 215/35R18 tire?
- A 215/35R18 tire is 23.9 inches tall (608 mm), calculated from the size. It is 8.5 inches wide with 3.0 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 215/35R18 mean?
- 215/35R18 means a tire 215 mm wide, with sidewalls 35% as tall as the tire is wide (75 mm), radial construction (R), for a 18 inch wheel.
- How many revolutions per mile does a 215/35R18 tire make?
- About 843 revolutions per mile, based on a circumference of 75.2 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 215/35R18 tire?
- Roughly 7.0" to 8.5". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 195/40R18 instead of 215/35R18?
- 195/40R18 is +0.22 inches (+0.9%) in overall diameter, so at an indicated 60 mph you would be doing 60.5 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.