Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 195/45-15 | 185/55-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.91 (556.5) | 23.01 (584.5) | 1.1 (28) 5% |
| Width inches (mm) | 7.68 (195) | 7.28 (185) | -0.39 (-10) -5.1% |
| Circum. inches (mm) | 68.83 (1748.3) | 72.29 (1836.26) | 3.46 (87.96) 5% |
| Sidewall Height inches (mm) | 3.45 (87.75) | 4.01 (101.75) | 0.55 (14) 16% |
| Revolutions per mile (km) | 920.52 (571.98) | 876.42 (544.58) | -44.1 (-27.4) -4.8% |
185/55-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.01 mph (33.81 km/h) |
| 25 mph (40.23 km/h) | 26.26 mph (42.26 km/h) |
| 30 mph (48.28 km/h) | 31.51 mph (50.71 km/h) |
| 35 mph (56.33 km/h) | 36.76 mph (59.16 km/h) |
| 40 mph (64.37 km/h) | 42.01 mph (67.61 km/h) |
| 45 mph (72.42 km/h) | 47.26 mph (76.06 km/h) |
| 50 mph (80.47 km/h) | 52.52 mph (84.52 km/h) |
| 55 mph (88.51 km/h) | 57.77 mph (92.97 km/h) |
| 60 mph (96.56 km/h) | 63.02 mph (101.42 km/h) |
| 65 mph (104.61 km/h) | 68.27 mph (109.87 km/h) |
| 70 mph (112.65 km/h) | 73.52 mph (118.32 km/h) |
| 75 mph (120.7 km/h) | 78.77 mph (126.77 km/h) |
| 80 mph (128.75 km/h) | 84.03 mph (135.23 km/h) |
| 85 mph (136.79 km/h) | 89.28 mph (143.68 km/h) |
| 90 mph (144.84 km/h) | 94.53 mph (152.13 km/h) |
| 95 mph (152.89 km/h) | 99.78 mph (160.58 km/h) |
| 100 mph (160.93 km/h) | 105.03 mph (169.03 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2230 | 2591 | 2790 | 2914 | 3047 | 3141 | 3246 | 3369 | 3540 | 3711 | 3901 | 4053 | 4328 | 4631 | 4869 | 5021 | 5106 | 5419 | 5856 | 6805 |
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