Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/70-15 | 300/70-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.92 (633) | 31.54 (801) | 6.61 (168) 26.5% |
| Width inches (mm) | 7.09 (180) | 11.81 (300) | 4.72 (120) 66.7% |
| Circum. inches (mm) | 78.29 (1988.63) | 99.07 (2516.42) | 20.78 (527.79) 26.5% |
| Sidewall Height inches (mm) | 4.96 (126) | 8.27 (210) | 3.31 (84) 66.7% |
| Revolutions per mile (km) | 809.27 (502.86) | 639.54 (397.39) | -169.74 (-105.47) -21% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 25.31 mph (40.73 km/h) |
| 25 mph (40.23 km/h) | 31.64 mph (50.91 km/h) |
| 30 mph (48.28 km/h) | 37.96 mph (61.09 km/h) |
| 35 mph (56.33 km/h) | 44.29 mph (71.28 km/h) |
| 40 mph (64.37 km/h) | 50.62 mph (81.46 km/h) |
| 45 mph (72.42 km/h) | 56.94 mph (91.64 km/h) |
| 50 mph (80.47 km/h) | 63.27 mph (101.82 km/h) |
| 55 mph (88.51 km/h) | 69.6 mph (112.01 km/h) |
| 60 mph (96.56 km/h) | 75.92 mph (122.19 km/h) |
| 65 mph (104.61 km/h) | 82.25 mph (132.37 km/h) |
| 70 mph (112.65 km/h) | 88.58 mph (142.55 km/h) |
| 75 mph (120.7 km/h) | 94.91 mph (152.74 km/h) |
| 80 mph (128.75 km/h) | 101.23 mph (162.92 km/h) |
| 85 mph (136.79 km/h) | 107.56 mph (173.1 km/h) |
| 90 mph (144.84 km/h) | 113.89 mph (183.28 km/h) |
| 95 mph (152.89 km/h) | 120.21 mph (193.46 km/h) |
| 100 mph (160.93 km/h) | 126.54 mph (203.65 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1628 | 1891 | 2036 | 2126 | 2223 | 2292 | 2369 | 2459 | 2583 | 2708 | 2846 | 2957 | 3158 | 3380 | 3553 | 3664 | 3726 | 3954 | 4273 | 4966 |
Better Fuel Economy Factory Ratios Increased Power
