Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/55-14 | 185/55-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.58 (548.1) | 23.01 (584.5) | 1.43 (36.4) 6.6% |
| Width inches (mm) | 6.89 (175) | 7.28 (185) | 0.39 (10) 5.7% |
| Circum. inches (mm) | 67.79 (1721.91) | 72.29 (1836.26) | 4.5 (114.35) 6.6% |
| Sidewall Height inches (mm) | 3.79 (96.25) | 4.01 (101.75) | 0.22 (5.5) 5.7% |
| Revolutions per mile (km) | 934.63 (580.75) | 876.42 (544.58) | -58.2 (-36.17) -6.2% |
185/55-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.33 mph (34.32 km/h) |
| 25 mph (40.23 km/h) | 26.66 mph (42.91 km/h) |
| 30 mph (48.28 km/h) | 31.99 mph (51.49 km/h) |
| 35 mph (56.33 km/h) | 37.32 mph (60.07 km/h) |
| 40 mph (64.37 km/h) | 42.66 mph (68.65 km/h) |
| 45 mph (72.42 km/h) | 47.99 mph (77.23 km/h) |
| 50 mph (80.47 km/h) | 53.32 mph (85.81 km/h) |
| 55 mph (88.51 km/h) | 58.65 mph (94.39 km/h) |
| 60 mph (96.56 km/h) | 63.98 mph (102.97 km/h) |
| 65 mph (104.61 km/h) | 69.32 mph (111.55 km/h) |
| 70 mph (112.65 km/h) | 74.65 mph (120.14 km/h) |
| 75 mph (120.7 km/h) | 79.98 mph (128.72 km/h) |
| 80 mph (128.75 km/h) | 85.31 mph (137.3 km/h) |
| 85 mph (136.79 km/h) | 90.64 mph (145.88 km/h) |
| 90 mph (144.84 km/h) | 95.98 mph (154.46 km/h) |
| 95 mph (152.89 km/h) | 101.31 mph (163.04 km/h) |
| 100 mph (160.93 km/h) | 106.64 mph (171.62 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
