Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/55-14 | 185/45-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.71 (526.1) | 21.56 (547.5) | 0.84 (21.4) 4.1% |
| Width inches (mm) | 6.1 (155) | 7.28 (185) | 1.18 (30) 19.4% |
| Circum. inches (mm) | 65.07 (1652.79) | 67.72 (1720.02) | 2.65 (67.23) 4.1% |
| Sidewall Height inches (mm) | 3.36 (85.25) | 3.28 (83.25) | -0.08 (-2) -2.3% |
| Revolutions per mile (km) | 973.71 (605.04) | 935.65 (581.39) | -38.06 (-23.65) -3.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.81 mph (33.5 km/h) |
| 25 mph (40.23 km/h) | 26.02 mph (41.87 km/h) |
| 30 mph (48.28 km/h) | 31.22 mph (50.24 km/h) |
| 35 mph (56.33 km/h) | 36.42 mph (58.62 km/h) |
| 40 mph (64.37 km/h) | 41.63 mph (66.99 km/h) |
| 45 mph (72.42 km/h) | 46.83 mph (75.37 km/h) |
| 50 mph (80.47 km/h) | 52.03 mph (83.74 km/h) |
| 55 mph (88.51 km/h) | 57.24 mph (92.11 km/h) |
| 60 mph (96.56 km/h) | 62.44 mph (100.49 km/h) |
| 65 mph (104.61 km/h) | 67.64 mph (108.86 km/h) |
| 70 mph (112.65 km/h) | 72.85 mph (117.24 km/h) |
| 75 mph (120.7 km/h) | 78.05 mph (125.61 km/h) |
| 80 mph (128.75 km/h) | 83.25 mph (133.98 km/h) |
| 85 mph (136.79 km/h) | 88.46 mph (142.36 km/h) |
| 90 mph (144.84 km/h) | 93.66 mph (150.73 km/h) |
| 95 mph (152.89 km/h) | 98.86 mph (159.11 km/h) |
| 100 mph (160.93 km/h) | 104.07 mph (167.48 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
