Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 150/60-18 | 385/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.09 (637.2) | 34.67 (880.7) | 9.59 (243.5) 38.2% |
| Width inches (mm) | 5.91 (150) | 15.16 (385) | 9.25 (235) 156.7% |
| Circum. inches (mm) | 78.81 (2001.82) | 108.93 (2766.8) | 30.12 (764.98) 38.2% |
| Sidewall Height inches (mm) | 3.54 (90) | 8.34 (211.75) | 4.79 (121.75) 135.3% |
| Revolutions per mile (km) | 803.94 (499.54) | 581.66 (361.43) | -222.28 (-138.12) -27.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 27.64 mph (44.49 km/h) |
| 25 mph (40.23 km/h) | 34.55 mph (55.61 km/h) |
| 30 mph (48.28 km/h) | 41.46 mph (66.73 km/h) |
| 35 mph (56.33 km/h) | 48.37 mph (77.85 km/h) |
| 40 mph (64.37 km/h) | 55.29 mph (88.97 km/h) |
| 45 mph (72.42 km/h) | 62.2 mph (100.1 km/h) |
| 50 mph (80.47 km/h) | 69.11 mph (111.22 km/h) |
| 55 mph (88.51 km/h) | 76.02 mph (122.34 km/h) |
| 60 mph (96.56 km/h) | 82.93 mph (133.46 km/h) |
| 65 mph (104.61 km/h) | 89.84 mph (144.58 km/h) |
| 70 mph (112.65 km/h) | 96.75 mph (155.7 km/h) |
| 75 mph (120.7 km/h) | 103.66 mph (166.83 km/h) |
| 80 mph (128.75 km/h) | 110.57 mph (177.95 km/h) |
| 85 mph (136.79 km/h) | 117.48 mph (189.07 km/h) |
| 90 mph (144.84 km/h) | 124.39 mph (200.19 km/h) |
| 95 mph (152.89 km/h) | 131.3 mph (211.31 km/h) |
| 100 mph (160.93 km/h) | 138.21 mph (222.43 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1480 | 1720 | 1852 | 1934 | 2022 | 2085 | 2154 | 2236 | 2349 | 2463 | 2589 | 2690 | 2872 | 3074 | 3231 | 3332 | 3389 | 3597 | 3886 | 4516 |
Better Fuel Economy Factory Ratios Increased Power
