195/65R18 tire size in inches
A 195/65R18 tire measures
28.0" tall × 7.7" wide
4.99" sidewall on a 18" wheel. 721 revolutions per mile.
195/65R18 means a tire 195 mm wide, with sidewalls 65% as tall as the tire is wide (127 mm), radial construction (R), for a 18 inch wheel.
195/65R18 specs
| Overall diameter (height) | 27.98 inches (711 mm) |
|---|---|
| Section width | 7.68 inches (195 mm) |
| Sidewall height | 4.99 inches (127 mm) |
| Wheel (rim) diameter | 18 inches |
| Circumference | 87.9 inches (2,233 mm) |
| Revolutions per mile | 721 |
| Revolutions per kilometer | 448 |
| Approximate rim width | 5.0" to 6.5" |
| In inches (flotation style) | 28.0x7.7R18 |
| Aspect ratio | 65% |
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 195/65R18 on a 18" wheel
These 18" sizes are within 3% of 195/65R18's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 255/50R18 | 28.04" | 10.04" | +0.2% | 60.1 mph | Compare |
| 315/40R18 | 27.92" | 12.40" | −0.2% | 59.9 mph | Compare |
| 285/45R18 | 28.10" | 11.22" | +0.4% | 60.3 mph | Compare |
| 215/60R18 | 28.16" | 8.46" | +0.6% | 60.4 mph | Compare |
| 235/55R18 | 28.18" | 9.25" | +0.7% | 60.4 mph | Compare |
| 225/55R18 | 27.74" | 8.86" | −0.8% | 59.5 mph | Compare |
| 275/45R18 | 27.74" | 10.83" | −0.8% | 59.5 mph | Compare |
| 325/40R18 | 28.24" | 12.80" | +0.9% | 60.5 mph | Compare |
| 205/60R18 | 27.69" | 8.07" | −1.1% | 59.4 mph | Compare |
| 245/50R18 | 27.65" | 9.65" | −1.2% | 59.3 mph | Compare |
| 305/40R18 | 27.61" | 12.01" | −1.3% | 59.2 mph | Compare |
| 265/50R18 | 28.43" | 10.43" | +1.6% | 61.0 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 285/40R19 | 19" | 27.98" | 0.0% | Compare |
| 355/25R21 | 21" | 27.99" | 0.0% | Compare |
| 225/45R20 | 20" | 27.97" | 0.0% | Compare |
| 275/60R15 | 15" | 27.99" | 0.0% | Compare |
| 295/30R21 | 21" | 27.97" | 0.0% | Compare |
| 215/65R17 | 17" | 28.00" | +0.1% | Compare |
| 305/25R22 | 22" | 28.00" | +0.1% | Compare |
| 325/35R19 | 19" | 27.96" | −0.1% | Compare |
| 235/70R15 | 15" | 27.95" | −0.1% | Compare |
| 255/30R22 | 22" | 28.02" | +0.2% | Compare |
| 235/65R16 | 16" | 28.03" | +0.2% | Compare |
| 255/35R21 | 21" | 28.03" | +0.2% | Compare |
One size up or down
- 205/65R18wider: 28.5" × 8.1"
- 195/60R18lower profile: 27.2" × 7.7"
- 195/70R18taller sidewall: 28.7" × 7.7"
Compare 195/65R18 with another size
Questions
- How tall is a 195/65R18 tire?
- A 195/65R18 tire is 28.0 inches tall (711 mm), calculated from the size. It is 7.7 inches wide with 5.0 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 195/65R18 mean?
- 195/65R18 means a tire 195 mm wide, with sidewalls 65% as tall as the tire is wide (127 mm), radial construction (R), for a 18 inch wheel.
- How many revolutions per mile does a 195/65R18 tire make?
- About 721 revolutions per mile, based on a circumference of 87.9 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 195/65R18 tire?
- Roughly 5.0" to 6.5". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 255/50R18 instead of 195/65R18?
- 255/50R18 is +0.06 inches (+0.2%) in overall diameter, so at an indicated 60 mph you would be doing 60.1 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.