Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/65-16 | 185/55-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.47 (646.9) | 28.01 (711.5) | 2.54 (64.6) 10% |
| Width inches (mm) | 7.28 (185) | 7.28 (185) | 0 (0) 0% |
| Circum. inches (mm) | 80.01 (2032.3) | 88 (2235.24) | 7.99 (202.95) 10% |
| Sidewall Height inches (mm) | 4.73 (120.25) | 4.01 (101.75) | -0.73 (-18.5) -15.4% |
| Revolutions per mile (km) | 791.88 (492.05) | 719.99 (447.38) | -71.9 (-44.68) -9.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22 mph (35.4 km/h) |
| 25 mph (40.23 km/h) | 27.5 mph (44.25 km/h) |
| 30 mph (48.28 km/h) | 33 mph (53.1 km/h) |
| 35 mph (56.33 km/h) | 38.5 mph (61.95 km/h) |
| 40 mph (64.37 km/h) | 43.99 mph (70.8 km/h) |
| 45 mph (72.42 km/h) | 49.49 mph (79.65 km/h) |
| 50 mph (80.47 km/h) | 54.99 mph (88.5 km/h) |
| 55 mph (88.51 km/h) | 60.49 mph (97.35 km/h) |
| 60 mph (96.56 km/h) | 65.99 mph (106.2 km/h) |
| 65 mph (104.61 km/h) | 71.49 mph (115.05 km/h) |
| 70 mph (112.65 km/h) | 76.99 mph (123.9 km/h) |
| 75 mph (120.7 km/h) | 82.49 mph (132.75 km/h) |
| 80 mph (128.75 km/h) | 87.99 mph (141.6 km/h) |
| 85 mph (136.79 km/h) | 93.49 mph (150.45 km/h) |
| 90 mph (144.84 km/h) | 98.99 mph (159.31 km/h) |
| 95 mph (152.89 km/h) | 104.49 mph (168.16 km/h) |
| 100 mph (160.93 km/h) | 109.99 mph (177.01 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1832 | 2129 | 2292 | 2394 | 2503 | 2581 | 2666 | 2768 | 2908 | 3049 | 3204 | 3329 | 3555 | 3805 | 4000 | 4124 | 4195 | 4452 | 4811 | 5590 |
Better Fuel Economy Factory Ratios Increased Power
