Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/45-15 | 185/60-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.56 (547.5) | 23.74 (603) | 2.19 (55.5) 10.1% |
| Width inches (mm) | 7.28 (185) | 7.28 (185) | 0 (0) 0% |
| Circum. inches (mm) | 67.72 (1720.02) | 74.58 (1894.38) | 6.86 (174.36) 10.1% |
| Sidewall Height inches (mm) | 3.28 (83.25) | 4.37 (111) | 1.09 (27.75) 33.3% |
| Revolutions per mile (km) | 935.65 (581.39) | 849.54 (527.88) | -86.12 (-53.51) -9.2% |
185/60-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.03 mph (35.45 km/h) |
| 25 mph (40.23 km/h) | 27.53 mph (44.31 km/h) |
| 30 mph (48.28 km/h) | 33.04 mph (53.17 km/h) |
| 35 mph (56.33 km/h) | 38.55 mph (62.04 km/h) |
| 40 mph (64.37 km/h) | 44.05 mph (70.9 km/h) |
| 45 mph (72.42 km/h) | 49.56 mph (79.76 km/h) |
| 50 mph (80.47 km/h) | 55.07 mph (88.62 km/h) |
| 55 mph (88.51 km/h) | 60.58 mph (97.49 km/h) |
| 60 mph (96.56 km/h) | 66.08 mph (106.35 km/h) |
| 65 mph (104.61 km/h) | 71.59 mph (115.21 km/h) |
| 70 mph (112.65 km/h) | 77.1 mph (124.07 km/h) |
| 75 mph (120.7 km/h) | 82.6 mph (132.94 km/h) |
| 80 mph (128.75 km/h) | 88.11 mph (141.8 km/h) |
| 85 mph (136.79 km/h) | 93.62 mph (150.66 km/h) |
| 90 mph (144.84 km/h) | 99.12 mph (159.52 km/h) |
| 95 mph (152.89 km/h) | 104.63 mph (168.39 km/h) |
| 100 mph (160.93 km/h) | 110.14 mph (177.25 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 |
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