Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/85-18 | 150/90-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.7 (703.7) | 27.63 (701.8) | -0.07 (-1.9) -0.3% |
| Width inches (mm) | 5.71 (145) | 5.91 (150) | 0.2 (5) 3.4% |
| Circum. inches (mm) | 87.04 (2210.74) | 86.8 (2204.77) | -0.24 (-5.97) -0.3% |
| Sidewall Height inches (mm) | 4.85 (123.25) | 5.31 (135) | 0.46 (11.75) 9.5% |
| Revolutions per mile (km) | 727.97 (452.34) | 729.94 (453.56) | 1.97 (1.22) 0.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.95 mph (32.1 km/h) |
| 25 mph (40.23 km/h) | 24.93 mph (40.13 km/h) |
| 30 mph (48.28 km/h) | 29.92 mph (48.15 km/h) |
| 35 mph (56.33 km/h) | 34.91 mph (56.18 km/h) |
| 40 mph (64.37 km/h) | 39.89 mph (64.2 km/h) |
| 45 mph (72.42 km/h) | 44.88 mph (72.23 km/h) |
| 50 mph (80.47 km/h) | 49.86 mph (80.25 km/h) |
| 55 mph (88.51 km/h) | 54.85 mph (88.28 km/h) |
| 60 mph (96.56 km/h) | 59.84 mph (96.3 km/h) |
| 65 mph (104.61 km/h) | 64.82 mph (104.33 km/h) |
| 70 mph (112.65 km/h) | 69.81 mph (112.35 km/h) |
| 75 mph (120.7 km/h) | 74.8 mph (120.38 km/h) |
| 80 mph (128.75 km/h) | 79.78 mph (128.4 km/h) |
| 85 mph (136.79 km/h) | 84.77 mph (136.43 km/h) |
| 90 mph (144.84 km/h) | 89.76 mph (144.45 km/h) |
| 95 mph (152.89 km/h) | 94.74 mph (152.48 km/h) |
| 100 mph (160.93 km/h) | 99.73 mph (160.5 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1858 | 2158 | 2324 | 2427 | 2537 | 2616 | 2703 | 2806 | 2948 | 3091 | 3249 | 3375 | 3604 | 3857 | 4055 | 4181 | 4253 | 4513 | 4877 | 5668 |
Better Fuel Economy Factory Ratios Increased Power
