Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/70-14 | 185/55-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.54 (572.6) | 23.01 (584.5) | 0.47 (11.9) 2.1% |
| Width inches (mm) | 6.1 (155) | 7.28 (185) | 1.18 (30) 19.4% |
| Circum. inches (mm) | 70.82 (1798.88) | 72.29 (1836.26) | 1.47 (37.38) 2.1% |
| Sidewall Height inches (mm) | 4.27 (108.5) | 4.01 (101.75) | -0.27 (-6.75) -6.2% |
| Revolutions per mile (km) | 894.64 (555.9) | 876.42 (544.58) | -18.21 (-11.32) -2% |
185/55-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.42 mph (32.86 km/h) |
| 25 mph (40.23 km/h) | 25.52 mph (41.07 km/h) |
| 30 mph (48.28 km/h) | 30.62 mph (49.28 km/h) |
| 35 mph (56.33 km/h) | 35.73 mph (57.5 km/h) |
| 40 mph (64.37 km/h) | 40.83 mph (65.71 km/h) |
| 45 mph (72.42 km/h) | 45.94 mph (73.93 km/h) |
| 50 mph (80.47 km/h) | 51.04 mph (82.14 km/h) |
| 55 mph (88.51 km/h) | 56.14 mph (90.35 km/h) |
| 60 mph (96.56 km/h) | 61.25 mph (98.57 km/h) |
| 65 mph (104.61 km/h) | 66.35 mph (106.78 km/h) |
| 70 mph (112.65 km/h) | 71.45 mph (115 km/h) |
| 75 mph (120.7 km/h) | 76.56 mph (123.21 km/h) |
| 80 mph (128.75 km/h) | 81.66 mph (131.42 km/h) |
| 85 mph (136.79 km/h) | 86.77 mph (139.64 km/h) |
| 90 mph (144.84 km/h) | 91.87 mph (147.85 km/h) |
| 95 mph (152.89 km/h) | 96.97 mph (156.07 km/h) |
| 100 mph (160.93 km/h) | 102.08 mph (164.28 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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