Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/55-12 | 225/50-12.5 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 19.15 (486.3) | 21.36 (542.5) | 2.21 (56.2) 11.6% |
| Width inches (mm) | 6.5 (165) | 8.86 (225) | 2.36 (60) 36.4% |
| Circum. inches (mm) | 60.15 (1527.76) | 67.1 (1704.31) | 6.95 (176.56) 11.6% |
| Sidewall Height inches (mm) | 3.57 (90.75) | 4.43 (112.5) | 0.86 (21.75) 24% |
| Revolutions per mile (km) | 1053.4 (654.55) | 944.28 (586.75) | -109.13 (-67.81) -10.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.31 mph (35.91 km/h) |
| 25 mph (40.23 km/h) | 27.89 mph (44.88 km/h) |
| 30 mph (48.28 km/h) | 33.47 mph (53.86 km/h) |
| 35 mph (56.33 km/h) | 39.04 mph (62.84 km/h) |
| 40 mph (64.37 km/h) | 44.62 mph (71.81 km/h) |
| 45 mph (72.42 km/h) | 50.2 mph (80.79 km/h) |
| 50 mph (80.47 km/h) | 55.78 mph (89.77 km/h) |
| 55 mph (88.51 km/h) | 61.36 mph (98.74 km/h) |
| 60 mph (96.56 km/h) | 66.93 mph (107.72 km/h) |
| 65 mph (104.61 km/h) | 72.51 mph (116.7 km/h) |
| 70 mph (112.65 km/h) | 78.09 mph (125.67 km/h) |
| 75 mph (120.7 km/h) | 83.67 mph (134.65 km/h) |
| 80 mph (128.75 km/h) | 89.25 mph (143.63 km/h) |
| 85 mph (136.79 km/h) | 94.82 mph (152.6 km/h) |
| 90 mph (144.84 km/h) | 100.4 mph (161.58 km/h) |
| 95 mph (152.89 km/h) | 105.98 mph (170.56 km/h) |
| 100 mph (160.93 km/h) | 111.56 mph (179.53 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
