Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/90-15 | 185/55-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.86 (606) | 23.01 (584.5) | -0.85 (-21.5) -3.5% |
| Width inches (mm) | 4.92 (125) | 7.28 (185) | 2.36 (60) 48% |
| Circum. inches (mm) | 74.95 (1903.81) | 72.29 (1836.26) | -2.66 (-67.54) -3.5% |
| Sidewall Height inches (mm) | 4.43 (112.5) | 4.01 (101.75) | -0.42 (-10.75) -9.6% |
| Revolutions per mile (km) | 845.33 (525.26) | 876.42 (544.58) | 31.09 (19.32) 3.7% |
185/55-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.29 mph (31.04 km/h) |
| 25 mph (40.23 km/h) | 24.11 mph (38.81 km/h) |
| 30 mph (48.28 km/h) | 28.94 mph (46.57 km/h) |
| 35 mph (56.33 km/h) | 33.76 mph (54.33 km/h) |
| 40 mph (64.37 km/h) | 38.58 mph (62.09 km/h) |
| 45 mph (72.42 km/h) | 43.4 mph (69.85 km/h) |
| 50 mph (80.47 km/h) | 48.23 mph (77.61 km/h) |
| 55 mph (88.51 km/h) | 53.05 mph (85.37 km/h) |
| 60 mph (96.56 km/h) | 57.87 mph (93.13 km/h) |
| 65 mph (104.61 km/h) | 62.69 mph (100.9 km/h) |
| 70 mph (112.65 km/h) | 67.52 mph (108.66 km/h) |
| 75 mph (120.7 km/h) | 72.34 mph (116.42 km/h) |
| 80 mph (128.75 km/h) | 77.16 mph (124.18 km/h) |
| 85 mph (136.79 km/h) | 81.98 mph (131.94 km/h) |
| 90 mph (144.84 km/h) | 86.81 mph (139.7 km/h) |
| 95 mph (152.89 km/h) | 91.63 mph (147.46 km/h) |
| 100 mph (160.93 km/h) | 96.45 mph (155.22 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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