Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/80-13 | 185/55-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.76 (578.2) | 23.01 (584.5) | 0.25 (6.3) 1.1% |
| Width inches (mm) | 6.1 (155) | 7.28 (185) | 1.18 (30) 19.4% |
| Circum. inches (mm) | 71.51 (1816.47) | 72.29 (1836.26) | 0.78 (19.79) 1.1% |
| Sidewall Height inches (mm) | 4.88 (124) | 4.01 (101.75) | -0.88 (-22.25) -17.9% |
| Revolutions per mile (km) | 885.97 (550.52) | 876.42 (544.58) | -9.55 (-5.93) -1.1% |
185/55-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.22 mph (32.54 km/h) |
| 25 mph (40.23 km/h) | 25.27 mph (40.67 km/h) |
| 30 mph (48.28 km/h) | 30.33 mph (48.81 km/h) |
| 35 mph (56.33 km/h) | 35.38 mph (56.94 km/h) |
| 40 mph (64.37 km/h) | 40.44 mph (65.08 km/h) |
| 45 mph (72.42 km/h) | 45.49 mph (73.21 km/h) |
| 50 mph (80.47 km/h) | 50.54 mph (81.34 km/h) |
| 55 mph (88.51 km/h) | 55.6 mph (89.48 km/h) |
| 60 mph (96.56 km/h) | 60.65 mph (97.61 km/h) |
| 65 mph (104.61 km/h) | 65.71 mph (105.75 km/h) |
| 70 mph (112.65 km/h) | 70.76 mph (113.88 km/h) |
| 75 mph (120.7 km/h) | 75.82 mph (122.02 km/h) |
| 80 mph (128.75 km/h) | 80.87 mph (130.15 km/h) |
| 85 mph (136.79 km/h) | 85.93 mph (138.28 km/h) |
| 90 mph (144.84 km/h) | 90.98 mph (146.42 km/h) |
| 95 mph (152.89 km/h) | 96.04 mph (154.55 km/h) |
| 100 mph (160.93 km/h) | 101.09 mph (162.69 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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