Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 150/90-15 | 185/60-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.63 (651) | 23.74 (603) | -1.89 (-48) -7.4% |
| Width inches (mm) | 5.91 (150) | 7.28 (185) | 1.38 (35) 23.3% |
| Circum. inches (mm) | 80.52 (2045.18) | 74.58 (1894.38) | -5.94 (-150.8) -7.4% |
| Sidewall Height inches (mm) | 5.31 (135) | 4.37 (111) | -0.94 (-24) -17.8% |
| Revolutions per mile (km) | 786.9 (488.95) | 849.54 (527.88) | 62.64 (38.92) 8% |
185/60-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.53 mph (29.81 km/h) |
| 25 mph (40.23 km/h) | 23.16 mph (37.27 km/h) |
| 30 mph (48.28 km/h) | 27.79 mph (44.72 km/h) |
| 35 mph (56.33 km/h) | 32.42 mph (52.17 km/h) |
| 40 mph (64.37 km/h) | 37.05 mph (59.63 km/h) |
| 45 mph (72.42 km/h) | 41.68 mph (67.08 km/h) |
| 50 mph (80.47 km/h) | 46.31 mph (74.53 km/h) |
| 55 mph (88.51 km/h) | 50.94 mph (81.99 km/h) |
| 60 mph (96.56 km/h) | 55.58 mph (89.44 km/h) |
| 65 mph (104.61 km/h) | 60.21 mph (96.89 km/h) |
| 70 mph (112.65 km/h) | 64.84 mph (104.35 km/h) |
| 75 mph (120.7 km/h) | 69.47 mph (111.8 km/h) |
| 80 mph (128.75 km/h) | 74.1 mph (119.25 km/h) |
| 85 mph (136.79 km/h) | 78.73 mph (126.71 km/h) |
| 90 mph (144.84 km/h) | 83.36 mph (134.16 km/h) |
| 95 mph (152.89 km/h) | 88 mph (141.62 km/h) |
| 100 mph (160.93 km/h) | 92.63 mph (149.07 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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