Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/65-15 | 185/55-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.96 (608.5) | 23.01 (584.5) | -0.94 (-24) -3.9% |
| Width inches (mm) | 6.89 (175) | 7.28 (185) | 0.39 (10) 5.7% |
| Circum. inches (mm) | 75.26 (1911.66) | 72.29 (1836.26) | -2.97 (-75.4) -3.9% |
| Sidewall Height inches (mm) | 4.48 (113.75) | 4.01 (101.75) | -0.47 (-12) -10.5% |
| Revolutions per mile (km) | 841.86 (523.1) | 876.42 (544.58) | 34.57 (21.48) 4.1% |
185/55-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.21 mph (30.92 km/h) |
| 25 mph (40.23 km/h) | 24.01 mph (38.65 km/h) |
| 30 mph (48.28 km/h) | 28.82 mph (46.38 km/h) |
| 35 mph (56.33 km/h) | 33.62 mph (54.11 km/h) |
| 40 mph (64.37 km/h) | 38.42 mph (61.83 km/h) |
| 45 mph (72.42 km/h) | 43.23 mph (69.56 km/h) |
| 50 mph (80.47 km/h) | 48.03 mph (77.29 km/h) |
| 55 mph (88.51 km/h) | 52.83 mph (85.02 km/h) |
| 60 mph (96.56 km/h) | 57.63 mph (92.75 km/h) |
| 65 mph (104.61 km/h) | 62.44 mph (100.48 km/h) |
| 70 mph (112.65 km/h) | 67.24 mph (108.21 km/h) |
| 75 mph (120.7 km/h) | 72.04 mph (115.94 km/h) |
| 80 mph (128.75 km/h) | 76.84 mph (123.67 km/h) |
| 85 mph (136.79 km/h) | 81.65 mph (131.4 km/h) |
| 90 mph (144.84 km/h) | 86.45 mph (139.13 km/h) |
| 95 mph (152.89 km/h) | 91.25 mph (146.86 km/h) |
| 100 mph (160.93 km/h) | 96.06 mph (154.59 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 |
Better Fuel Economy Factory Ratios Increased Power
