Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/70-12 | 180/50-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.65 (549.8) | 19.09 (484.8) | -2.56 (-65) -11.8% |
| Width inches (mm) | 6.89 (175) | 7.09 (180) | 0.2 (5) 2.9% |
| Circum. inches (mm) | 68 (1727.25) | 59.96 (1523.04) | -8.04 (-204.2) -11.8% |
| Sidewall Height inches (mm) | 4.82 (122.5) | 3.54 (90) | -1.28 (-32.5) -26.5% |
| Revolutions per mile (km) | 931.74 (578.95) | 1056.66 (656.58) | 124.92 (77.62) 13.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.64 mph (28.38 km/h) |
| 25 mph (40.23 km/h) | 22.04 mph (35.48 km/h) |
| 30 mph (48.28 km/h) | 26.45 mph (42.57 km/h) |
| 35 mph (56.33 km/h) | 30.86 mph (49.67 km/h) |
| 40 mph (64.37 km/h) | 35.27 mph (56.76 km/h) |
| 45 mph (72.42 km/h) | 39.68 mph (63.86 km/h) |
| 50 mph (80.47 km/h) | 44.09 mph (70.95 km/h) |
| 55 mph (88.51 km/h) | 48.5 mph (78.05 km/h) |
| 60 mph (96.56 km/h) | 52.91 mph (85.14 km/h) |
| 65 mph (104.61 km/h) | 57.32 mph (92.24 km/h) |
| 70 mph (112.65 km/h) | 61.72 mph (99.34 km/h) |
| 75 mph (120.7 km/h) | 66.13 mph (106.43 km/h) |
| 80 mph (128.75 km/h) | 70.54 mph (113.53 km/h) |
| 85 mph (136.79 km/h) | 74.95 mph (120.62 km/h) |
| 90 mph (144.84 km/h) | 79.36 mph (127.72 km/h) |
| 95 mph (152.89 km/h) | 83.77 mph (134.81 km/h) |
| 100 mph (160.93 km/h) | 88.18 mph (141.91 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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
