Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/60-18 | 195/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.5 (673.2) | 26.44 (671.7) | -0.06 (-1.5) -0.2% |
| Width inches (mm) | 7.09 (180) | 7.68 (195) | 0.59 (15) 8.3% |
| Circum. inches (mm) | 83.26 (2114.92) | 83.08 (2110.21) | -0.19 (-4.71) -0.2% |
| Sidewall Height inches (mm) | 4.25 (108) | 4.22 (107.25) | -0.03 (-0.75) -0.7% |
| Revolutions per mile (km) | 760.95 (472.83) | 762.65 (473.89) | 1.7 (1.06) 0.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.96 mph (32.12 km/h) |
| 25 mph (40.23 km/h) | 24.94 mph (40.14 km/h) |
| 30 mph (48.28 km/h) | 29.93 mph (48.17 km/h) |
| 35 mph (56.33 km/h) | 34.92 mph (56.2 km/h) |
| 40 mph (64.37 km/h) | 39.91 mph (64.23 km/h) |
| 45 mph (72.42 km/h) | 44.9 mph (72.26 km/h) |
| 50 mph (80.47 km/h) | 49.89 mph (80.29 km/h) |
| 55 mph (88.51 km/h) | 54.88 mph (88.32 km/h) |
| 60 mph (96.56 km/h) | 59.87 mph (96.35 km/h) |
| 65 mph (104.61 km/h) | 64.86 mph (104.37 km/h) |
| 70 mph (112.65 km/h) | 69.84 mph (112.4 km/h) |
| 75 mph (120.7 km/h) | 74.83 mph (120.43 km/h) |
| 80 mph (128.75 km/h) | 79.82 mph (128.46 km/h) |
| 85 mph (136.79 km/h) | 84.81 mph (136.49 km/h) |
| 90 mph (144.84 km/h) | 89.8 mph (144.52 km/h) |
| 95 mph (152.89 km/h) | 94.79 mph (152.55 km/h) |
| 100 mph (160.93 km/h) | 99.78 mph (160.58 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1941 | 2255 | 2428 | 2535 | 2651 | 2734 | 2824 | 2932 | 3080 | 3229 | 3394 | 3526 | 3766 | 4030 | 4237 | 4369 | 4443 | 4716 | 5096 | 5921 |
Better Fuel Economy Factory Ratios Increased Power
