Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/80-15 | 185/60-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.13 (613) | 23.74 (603) | -0.39 (-10) -1.6% |
| Width inches (mm) | 5.71 (145) | 7.28 (185) | 1.57 (40) 27.6% |
| Circum. inches (mm) | 75.82 (1925.8) | 74.58 (1894.38) | -1.24 (-31.42) -1.6% |
| Sidewall Height inches (mm) | 4.57 (116) | 4.37 (111) | -0.2 (-5) -4.3% |
| Revolutions per mile (km) | 835.68 (519.26) | 849.54 (527.88) | 13.86 (8.61) 1.7% |
185/60-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.67 mph (31.66 km/h) |
| 25 mph (40.23 km/h) | 24.59 mph (39.58 km/h) |
| 30 mph (48.28 km/h) | 29.51 mph (47.49 km/h) |
| 35 mph (56.33 km/h) | 34.43 mph (55.41 km/h) |
| 40 mph (64.37 km/h) | 39.35 mph (63.32 km/h) |
| 45 mph (72.42 km/h) | 44.27 mph (71.24 km/h) |
| 50 mph (80.47 km/h) | 49.18 mph (79.15 km/h) |
| 55 mph (88.51 km/h) | 54.1 mph (87.07 km/h) |
| 60 mph (96.56 km/h) | 59.02 mph (94.99 km/h) |
| 65 mph (104.61 km/h) | 63.94 mph (102.9 km/h) |
| 70 mph (112.65 km/h) | 68.86 mph (110.82 km/h) |
| 75 mph (120.7 km/h) | 73.78 mph (118.73 km/h) |
| 80 mph (128.75 km/h) | 78.69 mph (126.65 km/h) |
| 85 mph (136.79 km/h) | 83.61 mph (134.56 km/h) |
| 90 mph (144.84 km/h) | 88.53 mph (142.48 km/h) |
| 95 mph (152.89 km/h) | 93.45 mph (150.39 km/h) |
| 100 mph (160.93 km/h) | 98.37 mph (158.31 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2162 | 2511 | 2705 | 2824 | 2953 | 3045 | 3146 | 3266 | 3431 | 3597 | 3781 | 3928 | 4195 | 4489 | 4719 | 4867 | 4949 | 5253 | 5676 | 6596 |
Better Fuel Economy Factory Ratios Increased Power
