Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/60-15 | 185/55-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.32 (567) | 23.01 (584.5) | 0.69 (17.5) 3.1% |
| Width inches (mm) | 6.1 (155) | 7.28 (185) | 1.18 (30) 19.4% |
| Circum. inches (mm) | 70.13 (1781.28) | 72.29 (1836.26) | 2.16 (54.98) 3.1% |
| Sidewall Height inches (mm) | 3.66 (93) | 4.01 (101.75) | 0.34 (8.75) 9.4% |
| Revolutions per mile (km) | 903.47 (561.39) | 876.42 (544.58) | -27.05 (-16.81) -3% |
185/55-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.62 mph (33.18 km/h) |
| 25 mph (40.23 km/h) | 25.77 mph (41.48 km/h) |
| 30 mph (48.28 km/h) | 30.93 mph (49.77 km/h) |
| 35 mph (56.33 km/h) | 36.08 mph (58.07 km/h) |
| 40 mph (64.37 km/h) | 41.23 mph (66.36 km/h) |
| 45 mph (72.42 km/h) | 46.39 mph (74.66 km/h) |
| 50 mph (80.47 km/h) | 51.54 mph (82.95 km/h) |
| 55 mph (88.51 km/h) | 56.7 mph (91.25 km/h) |
| 60 mph (96.56 km/h) | 61.85 mph (99.54 km/h) |
| 65 mph (104.61 km/h) | 67.01 mph (107.84 km/h) |
| 70 mph (112.65 km/h) | 72.16 mph (116.13 km/h) |
| 75 mph (120.7 km/h) | 77.31 mph (124.43 km/h) |
| 80 mph (128.75 km/h) | 82.47 mph (132.72 km/h) |
| 85 mph (136.79 km/h) | 87.62 mph (141.02 km/h) |
| 90 mph (144.84 km/h) | 92.78 mph (149.31 km/h) |
| 95 mph (152.89 km/h) | 97.93 mph (157.61 km/h) |
| 100 mph (160.93 km/h) | 103.09 mph (165.9 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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