Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/45-15 | 185/45-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.56 (547.5) | 20.56 (522.1) | -1 (-25.4) -4.6% |
| Width inches (mm) | 7.28 (185) | 7.28 (185) | 0 (0) 0% |
| Circum. inches (mm) | 67.72 (1720.02) | 64.58 (1640.23) | -3.14 (-79.8) -4.6% |
| Sidewall Height inches (mm) | 3.28 (83.25) | 3.28 (83.25) | 0 (0) 0% |
| Revolutions per mile (km) | 935.65 (581.39) | 981.17 (609.67) | 45.52 (28.28) 4.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.07 mph (30.69 km/h) |
| 25 mph (40.23 km/h) | 23.84 mph (38.37 km/h) |
| 30 mph (48.28 km/h) | 28.61 mph (46.04 km/h) |
| 35 mph (56.33 km/h) | 33.38 mph (53.71 km/h) |
| 40 mph (64.37 km/h) | 38.14 mph (61.39 km/h) |
| 45 mph (72.42 km/h) | 42.91 mph (69.06 km/h) |
| 50 mph (80.47 km/h) | 47.68 mph (76.73 km/h) |
| 55 mph (88.51 km/h) | 52.45 mph (84.41 km/h) |
| 60 mph (96.56 km/h) | 57.22 mph (92.08 km/h) |
| 65 mph (104.61 km/h) | 61.98 mph (99.75 km/h) |
| 70 mph (112.65 km/h) | 66.75 mph (107.43 km/h) |
| 75 mph (120.7 km/h) | 71.52 mph (115.1 km/h) |
| 80 mph (128.75 km/h) | 76.29 mph (122.77 km/h) |
| 85 mph (136.79 km/h) | 81.06 mph (130.45 km/h) |
| 90 mph (144.84 km/h) | 85.82 mph (138.12 km/h) |
| 95 mph (152.89 km/h) | 90.59 mph (145.8 km/h) |
| 100 mph (160.93 km/h) | 95.36 mph (153.47 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
