Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 180/70-18 | 300/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.92 (709.2) | 32.17 (817.2) | 4.25 (108) 15.2% |
| Width inches (mm) | 7.09 (180) | 11.81 (300) | 4.72 (120) 66.7% |
| Circum. inches (mm) | 87.72 (2228.02) | 101.08 (2567.31) | 13.36 (339.29) 15.2% |
| Sidewall Height inches (mm) | 4.96 (126) | 7.09 (180) | 2.13 (54) 42.9% |
| Revolutions per mile (km) | 722.32 (448.83) | 626.86 (389.51) | -95.46 (-59.32) -13.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.05 mph (37.09 km/h) |
| 25 mph (40.23 km/h) | 28.81 mph (46.36 km/h) |
| 30 mph (48.28 km/h) | 34.57 mph (55.63 km/h) |
| 35 mph (56.33 km/h) | 40.33 mph (64.9 km/h) |
| 40 mph (64.37 km/h) | 46.09 mph (74.18 km/h) |
| 45 mph (72.42 km/h) | 51.85 mph (83.45 km/h) |
| 50 mph (80.47 km/h) | 57.61 mph (92.72 km/h) |
| 55 mph (88.51 km/h) | 63.38 mph (101.99 km/h) |
| 60 mph (96.56 km/h) | 69.14 mph (111.27 km/h) |
| 65 mph (104.61 km/h) | 74.9 mph (120.54 km/h) |
| 70 mph (112.65 km/h) | 80.66 mph (129.81 km/h) |
| 75 mph (120.7 km/h) | 86.42 mph (139.08 km/h) |
| 80 mph (128.75 km/h) | 92.18 mph (148.35 km/h) |
| 85 mph (136.79 km/h) | 97.94 mph (157.63 km/h) |
| 90 mph (144.84 km/h) | 103.71 mph (166.9 km/h) |
| 95 mph (152.89 km/h) | 109.47 mph (176.17 km/h) |
| 100 mph (160.93 km/h) | 115.23 mph (185.44 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1595 | 1853 | 1996 | 2084 | 2179 | 2247 | 2322 | 2410 | 2532 | 2654 | 2790 | 2899 | 3095 | 3313 | 3482 | 3591 | 3652 | 3876 | 4188 | 4867 |
Better Fuel Economy Factory Ratios Increased Power
