Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 115/70-16 | 185/55-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.34 (567.4) | 23.01 (584.5) | 0.67 (17.1) 3% |
| Width inches (mm) | 4.53 (115) | 7.28 (185) | 2.76 (70) 60.9% |
| Circum. inches (mm) | 70.18 (1782.54) | 72.29 (1836.26) | 2.12 (53.72) 3% |
| Sidewall Height inches (mm) | 3.17 (80.5) | 4.01 (101.75) | 0.84 (21.25) 26.4% |
| Revolutions per mile (km) | 902.84 (561) | 876.42 (544.58) | -26.41 (-16.41) -2.9% |
185/55-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.6 mph (33.16 km/h) |
| 25 mph (40.23 km/h) | 25.75 mph (41.45 km/h) |
| 30 mph (48.28 km/h) | 30.9 mph (49.74 km/h) |
| 35 mph (56.33 km/h) | 36.05 mph (58.02 km/h) |
| 40 mph (64.37 km/h) | 41.21 mph (66.31 km/h) |
| 45 mph (72.42 km/h) | 46.36 mph (74.6 km/h) |
| 50 mph (80.47 km/h) | 51.51 mph (82.89 km/h) |
| 55 mph (88.51 km/h) | 56.66 mph (91.18 km/h) |
| 60 mph (96.56 km/h) | 61.81 mph (99.47 km/h) |
| 65 mph (104.61 km/h) | 66.96 mph (107.76 km/h) |
| 70 mph (112.65 km/h) | 72.11 mph (116.05 km/h) |
| 75 mph (120.7 km/h) | 77.26 mph (124.34 km/h) |
| 80 mph (128.75 km/h) | 82.41 mph (132.63 km/h) |
| 85 mph (136.79 km/h) | 87.56 mph (140.92 km/h) |
| 90 mph (144.84 km/h) | 92.71 mph (149.21 km/h) |
| 95 mph (152.89 km/h) | 97.86 mph (157.5 km/h) |
| 100 mph (160.93 km/h) | 103.01 mph (165.78 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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