Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/60-18 | 175/100-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.32 (643.2) | 31.78 (807.2) | 6.46 (164) 25.5% |
| Width inches (mm) | 6.1 (155) | 6.89 (175) | 0.79 (20) 12.9% |
| Circum. inches (mm) | 79.55 (2020.67) | 99.84 (2535.89) | 20.28 (515.22) 25.5% |
| Sidewall Height inches (mm) | 3.66 (93) | 6.89 (175) | 3.23 (82) 88.2% |
| Revolutions per mile (km) | 796.44 (494.88) | 634.63 (394.34) | -161.81 (-100.55) -20.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 25.1 mph (40.39 km/h) |
| 25 mph (40.23 km/h) | 31.37 mph (50.49 km/h) |
| 30 mph (48.28 km/h) | 37.65 mph (60.59 km/h) |
| 35 mph (56.33 km/h) | 43.92 mph (70.69 km/h) |
| 40 mph (64.37 km/h) | 50.2 mph (80.79 km/h) |
| 45 mph (72.42 km/h) | 56.47 mph (90.89 km/h) |
| 50 mph (80.47 km/h) | 62.75 mph (100.98 km/h) |
| 55 mph (88.51 km/h) | 69.02 mph (111.08 km/h) |
| 60 mph (96.56 km/h) | 75.3 mph (121.18 km/h) |
| 65 mph (104.61 km/h) | 81.57 mph (131.28 km/h) |
| 70 mph (112.65 km/h) | 87.85 mph (141.38 km/h) |
| 75 mph (120.7 km/h) | 94.12 mph (151.48 km/h) |
| 80 mph (128.75 km/h) | 100.4 mph (161.58 km/h) |
| 85 mph (136.79 km/h) | 106.67 mph (171.67 km/h) |
| 90 mph (144.84 km/h) | 112.95 mph (181.77 km/h) |
| 95 mph (152.89 km/h) | 119.22 mph (191.87 km/h) |
| 100 mph (160.93 km/h) | 125.5 mph (201.97 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1615 | 1876 | 2020 | 2110 | 2206 | 2275 | 2350 | 2440 | 2563 | 2687 | 2825 | 2934 | 3134 | 3354 | 3526 | 3635 | 3697 | 3924 | 4240 | 4927 |
Better Fuel Economy Factory Ratios Increased Power
