Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 150/70-15 | 180/80-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.27 (591) | 26.34 (669) | 3.07 (78) 13.2% |
| Width inches (mm) | 5.91 (150) | 7.09 (180) | 1.18 (30) 20% |
| Circum. inches (mm) | 73.1 (1856.68) | 82.75 (2101.73) | 9.65 (245.04) 13.2% |
| Sidewall Height inches (mm) | 4.13 (105) | 5.67 (144) | 1.54 (39) 37.1% |
| Revolutions per mile (km) | 866.79 (538.59) | 765.73 (475.8) | -101.06 (-62.8) -11.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.64 mph (36.43 km/h) |
| 25 mph (40.23 km/h) | 28.3 mph (45.54 km/h) |
| 30 mph (48.28 km/h) | 33.96 mph (54.65 km/h) |
| 35 mph (56.33 km/h) | 39.62 mph (63.76 km/h) |
| 40 mph (64.37 km/h) | 45.28 mph (72.87 km/h) |
| 45 mph (72.42 km/h) | 50.94 mph (81.98 km/h) |
| 50 mph (80.47 km/h) | 56.6 mph (91.09 km/h) |
| 55 mph (88.51 km/h) | 62.26 mph (100.2 km/h) |
| 60 mph (96.56 km/h) | 67.92 mph (109.3 km/h) |
| 65 mph (104.61 km/h) | 73.58 mph (118.41 km/h) |
| 70 mph (112.65 km/h) | 79.24 mph (127.52 km/h) |
| 75 mph (120.7 km/h) | 84.9 mph (136.63 km/h) |
| 80 mph (128.75 km/h) | 90.56 mph (145.74 km/h) |
| 85 mph (136.79 km/h) | 96.22 mph (154.85 km/h) |
| 90 mph (144.84 km/h) | 101.88 mph (163.96 km/h) |
| 95 mph (152.89 km/h) | 107.54 mph (173.07 km/h) |
| 100 mph (160.93 km/h) | 113.2 mph (182.17 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1949 | 2264 | 2438 | 2546 | 2662 | 2745 | 2836 | 2944 | 3093 | 3242 | 3408 | 3541 | 3781 | 4047 | 4254 | 4386 | 4461 | 4735 | 5116 | 5945 |
Better Fuel Economy Factory Ratios Increased Power
