Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/70-12 | 225/65-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.65 (549.8) | 23.52 (597.3) | 1.87 (47.5) 8.6% |
| Width inches (mm) | 6.89 (175) | 8.86 (225) | 1.97 (50) 28.6% |
| Circum. inches (mm) | 68 (1727.25) | 73.88 (1876.47) | 5.88 (149.23) 8.6% |
| Sidewall Height inches (mm) | 4.82 (122.5) | 5.76 (146.25) | 0.94 (23.75) 19.4% |
| Revolutions per mile (km) | 931.74 (578.95) | 857.64 (532.91) | -74.1 (-46.04) -8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.73 mph (34.97 km/h) |
| 25 mph (40.23 km/h) | 27.16 mph (43.71 km/h) |
| 30 mph (48.28 km/h) | 32.59 mph (52.45 km/h) |
| 35 mph (56.33 km/h) | 38.02 mph (61.19 km/h) |
| 40 mph (64.37 km/h) | 43.46 mph (69.94 km/h) |
| 45 mph (72.42 km/h) | 48.89 mph (78.68 km/h) |
| 50 mph (80.47 km/h) | 54.32 mph (87.42 km/h) |
| 55 mph (88.51 km/h) | 59.75 mph (96.16 km/h) |
| 60 mph (96.56 km/h) | 65.18 mph (104.9 km/h) |
| 65 mph (104.61 km/h) | 70.62 mph (113.65 km/h) |
| 70 mph (112.65 km/h) | 76.05 mph (122.39 km/h) |
| 75 mph (120.7 km/h) | 81.48 mph (131.13 km/h) |
| 80 mph (128.75 km/h) | 86.91 mph (139.87 km/h) |
| 85 mph (136.79 km/h) | 92.34 mph (148.61 km/h) |
| 90 mph (144.84 km/h) | 97.78 mph (157.35 km/h) |
| 95 mph (152.89 km/h) | 103.21 mph (166.1 km/h) |
| 100 mph (160.93 km/h) | 108.64 mph (174.84 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
