Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 195/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 30.28 (769.2) | -0.12 (-3) -0.4% |
| Width inches (mm) | 6.89 (175) | 7.68 (195) | 0.79 (20) 11.4% |
| Circum. inches (mm) | 95.51 (2425.94) | 95.14 (2416.51) | -0.37 (-9.42) -0.4% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 6.14 (156) | -0.06 (-1.5) -1% |
| Revolutions per mile (km) | 663.39 (412.21) | 665.98 (413.82) | 2.59 (1.61) 0.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.92 mph (32.06 km/h) |
| 25 mph (40.23 km/h) | 24.9 mph (40.08 km/h) |
| 30 mph (48.28 km/h) | 29.88 mph (48.09 km/h) |
| 35 mph (56.33 km/h) | 34.86 mph (56.11 km/h) |
| 40 mph (64.37 km/h) | 39.84 mph (64.12 km/h) |
| 45 mph (72.42 km/h) | 44.83 mph (72.14 km/h) |
| 50 mph (80.47 km/h) | 49.81 mph (80.15 km/h) |
| 55 mph (88.51 km/h) | 54.79 mph (88.17 km/h) |
| 60 mph (96.56 km/h) | 59.77 mph (96.19 km/h) |
| 65 mph (104.61 km/h) | 64.75 mph (104.2 km/h) |
| 70 mph (112.65 km/h) | 69.73 mph (112.22 km/h) |
| 75 mph (120.7 km/h) | 74.71 mph (120.23 km/h) |
| 80 mph (128.75 km/h) | 79.69 mph (128.25 km/h) |
| 85 mph (136.79 km/h) | 84.67 mph (136.26 km/h) |
| 90 mph (144.84 km/h) | 89.65 mph (144.28 km/h) |
| 95 mph (152.89 km/h) | 94.63 mph (152.29 km/h) |
| 100 mph (160.93 km/h) | 99.61 mph (160.31 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1695 | 1969 | 2120 | 2214 | 2315 | 2387 | 2466 | 2560 | 2690 | 2820 | 2964 | 3079 | 3289 | 3519 | 3700 | 3815 | 3880 | 4118 | 4450 | 5171 |
Better Fuel Economy Factory Ratios Increased Power
