Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-14 | 185/55-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.5 (571.6) | 23.01 (584.5) | 0.51 (12.9) 2.3% |
| Width inches (mm) | 5.31 (135) | 7.28 (185) | 1.97 (50) 37% |
| Circum. inches (mm) | 70.7 (1795.73) | 72.29 (1836.26) | 1.6 (40.53) 2.3% |
| Sidewall Height inches (mm) | 4.25 (108) | 4.01 (101.75) | -0.25 (-6.25) -5.8% |
| Revolutions per mile (km) | 896.2 (556.87) | 876.42 (544.58) | -19.78 (-12.29) -2.2% |
185/55-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.45 mph (32.91 km/h) |
| 25 mph (40.23 km/h) | 25.56 mph (41.14 km/h) |
| 30 mph (48.28 km/h) | 30.68 mph (49.37 km/h) |
| 35 mph (56.33 km/h) | 35.79 mph (57.6 km/h) |
| 40 mph (64.37 km/h) | 40.9 mph (65.83 km/h) |
| 45 mph (72.42 km/h) | 46.02 mph (74.06 km/h) |
| 50 mph (80.47 km/h) | 51.13 mph (82.28 km/h) |
| 55 mph (88.51 km/h) | 56.24 mph (90.51 km/h) |
| 60 mph (96.56 km/h) | 61.35 mph (98.74 km/h) |
| 65 mph (104.61 km/h) | 66.47 mph (106.97 km/h) |
| 70 mph (112.65 km/h) | 71.58 mph (115.2 km/h) |
| 75 mph (120.7 km/h) | 76.69 mph (123.43 km/h) |
| 80 mph (128.75 km/h) | 81.81 mph (131.65 km/h) |
| 85 mph (136.79 km/h) | 86.92 mph (139.88 km/h) |
| 90 mph (144.84 km/h) | 92.03 mph (148.11 km/h) |
| 95 mph (152.89 km/h) | 97.14 mph (156.34 km/h) |
| 100 mph (160.93 km/h) | 102.26 mph (164.57 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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