Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/45-15 | 185/60-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.2 (538.5) | 23.74 (603) | 2.54 (64.5) 12% |
| Width inches (mm) | 6.89 (175) | 7.28 (185) | 0.39 (10) 5.7% |
| Circum. inches (mm) | 66.6 (1691.75) | 74.58 (1894.38) | 7.98 (202.63) 12% |
| Sidewall Height inches (mm) | 3.1 (78.75) | 4.37 (111) | 1.27 (32.25) 41% |
| Revolutions per mile (km) | 951.29 (591.1) | 849.54 (527.88) | -101.75 (-63.23) -10.7% |
185/60-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.4 mph (36.04 km/h) |
| 25 mph (40.23 km/h) | 27.99 mph (45.05 km/h) |
| 30 mph (48.28 km/h) | 33.59 mph (54.06 km/h) |
| 35 mph (56.33 km/h) | 39.19 mph (63.07 km/h) |
| 40 mph (64.37 km/h) | 44.79 mph (72.08 km/h) |
| 45 mph (72.42 km/h) | 50.39 mph (81.09 km/h) |
| 50 mph (80.47 km/h) | 55.99 mph (90.11 km/h) |
| 55 mph (88.51 km/h) | 61.59 mph (99.12 km/h) |
| 60 mph (96.56 km/h) | 67.19 mph (108.13 km/h) |
| 65 mph (104.61 km/h) | 72.79 mph (117.14 km/h) |
| 70 mph (112.65 km/h) | 78.38 mph (126.15 km/h) |
| 75 mph (120.7 km/h) | 83.98 mph (135.16 km/h) |
| 80 mph (128.75 km/h) | 89.58 mph (144.17 km/h) |
| 85 mph (136.79 km/h) | 95.18 mph (153.18 km/h) |
| 90 mph (144.84 km/h) | 100.78 mph (162.19 km/h) |
| 95 mph (152.89 km/h) | 106.38 mph (171.2 km/h) |
| 100 mph (160.93 km/h) | 111.98 mph (180.21 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
