Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 140/70-18 | 150/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.72 (653.2) | 27.45 (697.2) | 1.73 (44) 6.7% |
| Width inches (mm) | 5.51 (140) | 5.91 (150) | 0.39 (10) 7.1% |
| Circum. inches (mm) | 80.79 (2052.09) | 86.23 (2190.32) | 5.44 (138.23) 6.7% |
| Sidewall Height inches (mm) | 3.86 (98) | 4.72 (120) | 0.87 (22) 22.4% |
| Revolutions per mile (km) | 784.25 (487.31) | 734.75 (456.55) | -49.49 (-30.75) -6.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.35 mph (34.36 km/h) |
| 25 mph (40.23 km/h) | 26.68 mph (42.94 km/h) |
| 30 mph (48.28 km/h) | 32.02 mph (51.53 km/h) |
| 35 mph (56.33 km/h) | 37.36 mph (60.12 km/h) |
| 40 mph (64.37 km/h) | 42.69 mph (68.71 km/h) |
| 45 mph (72.42 km/h) | 48.03 mph (77.3 km/h) |
| 50 mph (80.47 km/h) | 53.37 mph (85.89 km/h) |
| 55 mph (88.51 km/h) | 58.7 mph (94.48 km/h) |
| 60 mph (96.56 km/h) | 64.04 mph (103.07 km/h) |
| 65 mph (104.61 km/h) | 69.38 mph (111.65 km/h) |
| 70 mph (112.65 km/h) | 74.72 mph (120.24 km/h) |
| 75 mph (120.7 km/h) | 80.05 mph (128.83 km/h) |
| 80 mph (128.75 km/h) | 85.39 mph (137.42 km/h) |
| 85 mph (136.79 km/h) | 90.73 mph (146.01 km/h) |
| 90 mph (144.84 km/h) | 96.06 mph (154.6 km/h) |
| 95 mph (152.89 km/h) | 101.4 mph (163.19 km/h) |
| 100 mph (160.93 km/h) | 106.74 mph (171.78 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1870 | 2172 | 2339 | 2443 | 2554 | 2634 | 2721 | 2825 | 2968 | 3111 | 3270 | 3397 | 3628 | 3883 | 4082 | 4209 | 4281 | 4543 | 4909 | 5705 |
Better Fuel Economy Factory Ratios Increased Power
