205/35R18 tire size in inches
A 205/35R18 tire measures
23.6" tall × 8.1" wide
2.82" sidewall on a 18" wheel. 853 revolutions per mile.
205/35R18 means a tire 205 mm wide, with sidewalls 35% as tall as the tire is wide (72 mm), radial construction (R), for a 18 inch wheel.
205/35R18 specs
| Overall diameter (height) | 23.65 inches (601 mm) |
|---|---|
| Section width | 8.07 inches (205 mm) |
| Sidewall height | 2.82 inches (72 mm) |
| Wheel (rim) diameter | 18 inches |
| Circumference | 74.3 inches (1,887 mm) |
| Revolutions per mile | 853 |
| Revolutions per kilometer | 530 |
| Approximate rim width | 6.5" to 8.0" |
| In inches (flotation style) | 23.6x8.1R18 |
| 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 205/35R18 on a 18" wheel
These 18" sizes are within 3% of 205/35R18's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 215/35R18 | 23.93" | 8.46" | +1.2% | 60.7 mph | Compare |
| 195/35R18 | 23.37" | 7.68" | −1.2% | 59.3 mph | Compare |
| 195/40R18 | 24.14" | 7.68" | +2.1% | 61.2 mph | Compare |
| 225/35R18 | 24.20" | 8.86" | +2.3% | 61.4 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 175/70R14 | 14" | 23.65" | 0.0% | Compare |
| 225/60R13 | 13" | 23.63" | −0.1% | Compare |
| 235/25R19 | 19" | 23.63" | −0.1% | Compare |
| 195/50R16 | 16" | 23.68" | +0.1% | Compare |
| 215/45R16 | 16" | 23.62" | −0.1% | Compare |
| 245/45R15 | 15" | 23.68" | +0.1% | Compare |
| 205/60R14 | 14" | 23.69" | +0.1% | Compare |
| 245/40R16 | 16" | 23.72" | +0.3% | Compare |
| 175/55R16 | 16" | 23.58" | −0.3% | Compare |
| 185/60R15 | 15" | 23.74" | +0.4% | Compare |
| 165/75R14 | 14" | 23.74" | +0.4% | Compare |
| 185/45R17 | 17" | 23.56" | −0.4% | Compare |
One size up or down
Compare 205/35R18 with another size
Questions
- How tall is a 205/35R18 tire?
- A 205/35R18 tire is 23.6 inches tall (601 mm), calculated from the size. It is 8.1 inches wide with 2.8 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 205/35R18 mean?
- 205/35R18 means a tire 205 mm wide, with sidewalls 35% as tall as the tire is wide (72 mm), radial construction (R), for a 18 inch wheel.
- How many revolutions per mile does a 205/35R18 tire make?
- About 853 revolutions per mile, based on a circumference of 74.3 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 205/35R18 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 215/35R18 instead of 205/35R18?
- 215/35R18 is +0.28 inches (+1.2%) in overall diameter, so at an indicated 60 mph you would be doing 60.7 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.