Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/50-15 | 185/55-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.89 (556) | 23.01 (584.5) | 1.12 (28.5) 5.1% |
| Width inches (mm) | 6.89 (175) | 7.28 (185) | 0.39 (10) 5.7% |
| Circum. inches (mm) | 68.77 (1746.73) | 72.29 (1836.26) | 3.53 (89.54) 5.1% |
| Sidewall Height inches (mm) | 3.44 (87.5) | 4.01 (101.75) | 0.56 (14.25) 16.3% |
| Revolutions per mile (km) | 921.35 (572.5) | 876.42 (544.58) | -44.92 (-27.91) -4.9% |
185/55-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.03 mph (33.84 km/h) |
| 25 mph (40.23 km/h) | 26.28 mph (42.3 km/h) |
| 30 mph (48.28 km/h) | 31.54 mph (50.76 km/h) |
| 35 mph (56.33 km/h) | 36.79 mph (59.21 km/h) |
| 40 mph (64.37 km/h) | 42.05 mph (67.67 km/h) |
| 45 mph (72.42 km/h) | 47.31 mph (76.13 km/h) |
| 50 mph (80.47 km/h) | 52.56 mph (84.59 km/h) |
| 55 mph (88.51 km/h) | 57.82 mph (93.05 km/h) |
| 60 mph (96.56 km/h) | 63.08 mph (101.51 km/h) |
| 65 mph (104.61 km/h) | 68.33 mph (109.97 km/h) |
| 70 mph (112.65 km/h) | 73.59 mph (118.43 km/h) |
| 75 mph (120.7 km/h) | 78.84 mph (126.89 km/h) |
| 80 mph (128.75 km/h) | 84.1 mph (135.35 km/h) |
| 85 mph (136.79 km/h) | 89.36 mph (143.81 km/h) |
| 90 mph (144.84 km/h) | 94.61 mph (152.27 km/h) |
| 95 mph (152.89 km/h) | 99.87 mph (160.72 km/h) |
| 100 mph (160.93 km/h) | 105.13 mph (169.18 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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