Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/55-12 | 185/65-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 19.15 (486.3) | 21.47 (545.3) | 2.32 (59) 12.1% |
| Width inches (mm) | 6.5 (165) | 7.28 (185) | 0.79 (20) 12.1% |
| Circum. inches (mm) | 60.15 (1527.76) | 67.45 (1713.11) | 7.3 (185.35) 12.1% |
| Sidewall Height inches (mm) | 3.57 (90.75) | 4.73 (120.25) | 1.16 (29.5) 32.5% |
| Revolutions per mile (km) | 1053.4 (654.55) | 939.43 (583.73) | -113.98 (-70.82) -10.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.43 mph (36.09 km/h) |
| 25 mph (40.23 km/h) | 28.03 mph (45.11 km/h) |
| 30 mph (48.28 km/h) | 33.64 mph (54.14 km/h) |
| 35 mph (56.33 km/h) | 39.25 mph (63.16 km/h) |
| 40 mph (64.37 km/h) | 44.85 mph (72.18 km/h) |
| 45 mph (72.42 km/h) | 50.46 mph (81.21 km/h) |
| 50 mph (80.47 km/h) | 56.07 mph (90.23 km/h) |
| 55 mph (88.51 km/h) | 61.67 mph (99.25 km/h) |
| 60 mph (96.56 km/h) | 67.28 mph (108.28 km/h) |
| 65 mph (104.61 km/h) | 72.89 mph (117.3 km/h) |
| 70 mph (112.65 km/h) | 78.49 mph (126.32 km/h) |
| 75 mph (120.7 km/h) | 84.1 mph (135.34 km/h) |
| 80 mph (128.75 km/h) | 89.71 mph (144.37 km/h) |
| 85 mph (136.79 km/h) | 95.31 mph (153.39 km/h) |
| 90 mph (144.84 km/h) | 100.92 mph (162.41 km/h) |
| 95 mph (152.89 km/h) | 106.53 mph (171.44 km/h) |
| 100 mph (160.93 km/h) | 112.13 mph (180.46 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
