Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/65-18 | 205/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.21 (691.2) | 28.49 (723.7) | 1.28 (32.5) 4.7% |
| Width inches (mm) | 7.09 (180) | 8.07 (205) | 0.98 (25) 13.9% |
| Circum. inches (mm) | 85.49 (2171.47) | 89.51 (2273.57) | 4.02 (102.1) 4.7% |
| Sidewall Height inches (mm) | 4.61 (117) | 5.25 (133.25) | 0.64 (16.25) 13.9% |
| Revolutions per mile (km) | 741.13 (460.52) | 707.85 (439.84) | -33.28 (-20.68) -4.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.94 mph (33.7 km/h) |
| 25 mph (40.23 km/h) | 26.18 mph (42.13 km/h) |
| 30 mph (48.28 km/h) | 31.41 mph (50.55 km/h) |
| 35 mph (56.33 km/h) | 36.65 mph (58.98 km/h) |
| 40 mph (64.37 km/h) | 41.88 mph (67.4 km/h) |
| 45 mph (72.42 km/h) | 47.12 mph (75.83 km/h) |
| 50 mph (80.47 km/h) | 52.35 mph (84.25 km/h) |
| 55 mph (88.51 km/h) | 57.59 mph (92.68 km/h) |
| 60 mph (96.56 km/h) | 62.82 mph (101.1 km/h) |
| 65 mph (104.61 km/h) | 68.06 mph (109.53 km/h) |
| 70 mph (112.65 km/h) | 73.29 mph (117.95 km/h) |
| 75 mph (120.7 km/h) | 78.53 mph (126.38 km/h) |
| 80 mph (128.75 km/h) | 83.76 mph (134.8 km/h) |
| 85 mph (136.79 km/h) | 89 mph (143.23 km/h) |
| 90 mph (144.84 km/h) | 94.23 mph (151.65 km/h) |
| 95 mph (152.89 km/h) | 99.47 mph (160.08 km/h) |
| 100 mph (160.93 km/h) | 104.7 mph (168.5 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1801 | 2093 | 2254 | 2353 | 2461 | 2537 | 2622 | 2721 | 2859 | 2997 | 3150 | 3273 | 3495 | 3741 | 3932 | 4055 | 4124 | 4377 | 4729 | 5496 |
Better Fuel Economy Factory Ratios Increased Power
