Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 115/70-15 | 185/60-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.34 (542) | 23.74 (603) | 2.4 (61) 11.3% |
| Width inches (mm) | 4.53 (115) | 7.28 (185) | 2.76 (70) 60.9% |
| Circum. inches (mm) | 67.04 (1702.74) | 74.58 (1894.38) | 7.54 (191.64) 11.3% |
| Sidewall Height inches (mm) | 3.17 (80.5) | 4.37 (111) | 1.2 (30.5) 37.9% |
| Revolutions per mile (km) | 945.15 (587.29) | 849.54 (527.88) | -95.61 (-59.41) -10.1% |
185/60-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.25 mph (35.81 km/h) |
| 25 mph (40.23 km/h) | 27.81 mph (44.76 km/h) |
| 30 mph (48.28 km/h) | 33.38 mph (53.71 km/h) |
| 35 mph (56.33 km/h) | 38.94 mph (62.67 km/h) |
| 40 mph (64.37 km/h) | 44.5 mph (71.62 km/h) |
| 45 mph (72.42 km/h) | 50.06 mph (80.57 km/h) |
| 50 mph (80.47 km/h) | 55.63 mph (89.52 km/h) |
| 55 mph (88.51 km/h) | 61.19 mph (98.48 km/h) |
| 60 mph (96.56 km/h) | 66.75 mph (107.43 km/h) |
| 65 mph (104.61 km/h) | 72.32 mph (116.38 km/h) |
| 70 mph (112.65 km/h) | 77.88 mph (125.33 km/h) |
| 75 mph (120.7 km/h) | 83.44 mph (134.29 km/h) |
| 80 mph (128.75 km/h) | 89 mph (143.24 km/h) |
| 85 mph (136.79 km/h) | 94.57 mph (152.19 km/h) |
| 90 mph (144.84 km/h) | 100.13 mph (161.14 km/h) |
| 95 mph (152.89 km/h) | 105.69 mph (170.09 km/h) |
| 100 mph (160.93 km/h) | 111.25 mph (179.05 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
