Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 205/80-12 | 225/65-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.91 (632.8) | 23.52 (597.3) | -1.4 (-35.5) -5.6% |
| Width inches (mm) | 8.07 (205) | 8.86 (225) | 0.79 (20) 9.8% |
| Circum. inches (mm) | 78.27 (1988) | 73.88 (1876.47) | -4.39 (-111.53) -5.6% |
| Sidewall Height inches (mm) | 6.46 (164) | 5.76 (146.25) | -0.7 (-17.75) -10.8% |
| Revolutions per mile (km) | 809.53 (503.02) | 857.64 (532.91) | 48.11 (29.9) 5.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.88 mph (30.38 km/h) |
| 25 mph (40.23 km/h) | 23.6 mph (37.98 km/h) |
| 30 mph (48.28 km/h) | 28.32 mph (45.57 km/h) |
| 35 mph (56.33 km/h) | 33.04 mph (53.17 km/h) |
| 40 mph (64.37 km/h) | 37.76 mph (60.76 km/h) |
| 45 mph (72.42 km/h) | 42.48 mph (68.36 km/h) |
| 50 mph (80.47 km/h) | 47.2 mph (75.95 km/h) |
| 55 mph (88.51 km/h) | 51.91 mph (83.55 km/h) |
| 60 mph (96.56 km/h) | 56.63 mph (91.14 km/h) |
| 65 mph (104.61 km/h) | 61.35 mph (98.74 km/h) |
| 70 mph (112.65 km/h) | 66.07 mph (106.33 km/h) |
| 75 mph (120.7 km/h) | 70.79 mph (113.93 km/h) |
| 80 mph (128.75 km/h) | 75.51 mph (121.53 km/h) |
| 85 mph (136.79 km/h) | 80.23 mph (129.12 km/h) |
| 90 mph (144.84 km/h) | 84.95 mph (136.72 km/h) |
| 95 mph (152.89 km/h) | 89.67 mph (144.31 km/h) |
| 100 mph (160.93 km/h) | 94.39 mph (151.91 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2183 | 2535 | 2730 | 2851 | 2981 | 3074 | 3176 | 3297 | 3464 | 3631 | 3817 | 3966 | 4235 | 4532 | 4764 | 4913 | 4997 | 5303 | 5730 | 6659 |
Better Fuel Economy Factory Ratios Increased Power
