Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/55-16 | 185/45-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.58 (598.9) | 22.56 (572.9) | -1.02 (-26) -4.3% |
| Width inches (mm) | 6.89 (175) | 7.28 (185) | 0.39 (10) 5.7% |
| Circum. inches (mm) | 74.07 (1881.5) | 70.86 (1799.82) | -3.22 (-81.68) -4.3% |
| Sidewall Height inches (mm) | 3.79 (96.25) | 3.28 (83.25) | -0.51 (-13) -13.5% |
| Revolutions per mile (km) | 855.35 (531.49) | 894.17 (555.61) | 38.82 (24.12) 4.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.13 mph (30.79 km/h) |
| 25 mph (40.23 km/h) | 23.91 mph (38.49 km/h) |
| 30 mph (48.28 km/h) | 28.7 mph (46.18 km/h) |
| 35 mph (56.33 km/h) | 33.48 mph (53.88 km/h) |
| 40 mph (64.37 km/h) | 38.26 mph (61.58 km/h) |
| 45 mph (72.42 km/h) | 43.05 mph (69.28 km/h) |
| 50 mph (80.47 km/h) | 47.83 mph (76.97 km/h) |
| 55 mph (88.51 km/h) | 52.61 mph (84.67 km/h) |
| 60 mph (96.56 km/h) | 57.4 mph (92.37 km/h) |
| 65 mph (104.61 km/h) | 62.18 mph (100.07 km/h) |
| 70 mph (112.65 km/h) | 66.96 mph (107.76 km/h) |
| 75 mph (120.7 km/h) | 71.74 mph (115.46 km/h) |
| 80 mph (128.75 km/h) | 76.53 mph (123.16 km/h) |
| 85 mph (136.79 km/h) | 81.31 mph (130.86 km/h) |
| 90 mph (144.84 km/h) | 86.09 mph (138.55 km/h) |
| 95 mph (152.89 km/h) | 90.88 mph (146.25 km/h) |
| 100 mph (160.93 km/h) | 95.66 mph (153.95 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2275 | 2643 | 2847 | 2973 | 3108 | 3205 | 3312 | 3437 | 3612 | 3786 | 3980 | 4135 | 4415 | 4725 | 4967 | 5122 | 5209 | 5529 | 5974 | 6943 |
Better Fuel Economy Factory Ratios Increased Power
