Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/70-18 | 150/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.92 (709.2) | 27.45 (697.2) | -0.47 (-12) -1.7% |
| Width inches (mm) | 7.09 (180) | 5.91 (150) | -1.18 (-30) -16.7% |
| Circum. inches (mm) | 87.72 (2228.02) | 86.23 (2190.32) | -1.48 (-37.7) -1.7% |
| Sidewall Height inches (mm) | 4.96 (126) | 4.72 (120) | -0.24 (-6) -4.8% |
| Revolutions per mile (km) | 722.32 (448.83) | 734.75 (456.55) | 12.43 (7.73) 1.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.66 mph (31.64 km/h) |
| 25 mph (40.23 km/h) | 24.58 mph (39.55 km/h) |
| 30 mph (48.28 km/h) | 29.49 mph (47.46 km/h) |
| 35 mph (56.33 km/h) | 34.41 mph (55.37 km/h) |
| 40 mph (64.37 km/h) | 39.32 mph (63.28 km/h) |
| 45 mph (72.42 km/h) | 44.24 mph (71.2 km/h) |
| 50 mph (80.47 km/h) | 49.15 mph (79.11 km/h) |
| 55 mph (88.51 km/h) | 54.07 mph (87.02 km/h) |
| 60 mph (96.56 km/h) | 58.98 mph (94.93 km/h) |
| 65 mph (104.61 km/h) | 63.9 mph (102.84 km/h) |
| 70 mph (112.65 km/h) | 68.82 mph (110.75 km/h) |
| 75 mph (120.7 km/h) | 73.73 mph (118.66 km/h) |
| 80 mph (128.75 km/h) | 78.65 mph (126.57 km/h) |
| 85 mph (136.79 km/h) | 83.56 mph (134.48 km/h) |
| 90 mph (144.84 km/h) | 88.48 mph (142.39 km/h) |
| 95 mph (152.89 km/h) | 93.39 mph (150.3 km/h) |
| 100 mph (160.93 km/h) | 98.31 mph (158.21 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
