Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/70-12 | 145/70-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.65 (549.8) | 19.99 (507.8) | -1.65 (-42) -7.6% |
| Width inches (mm) | 6.89 (175) | 5.71 (145) | -1.18 (-30) -17.1% |
| Circum. inches (mm) | 68 (1727.25) | 62.81 (1595.3) | -5.19 (-131.95) -7.6% |
| Sidewall Height inches (mm) | 4.82 (122.5) | 4 (101.5) | -0.83 (-21) -17.1% |
| Revolutions per mile (km) | 931.74 (578.95) | 1008.8 (626.84) | 77.06 (47.89) 8.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.47 mph (29.73 km/h) |
| 25 mph (40.23 km/h) | 23.09 mph (37.16 km/h) |
| 30 mph (48.28 km/h) | 27.71 mph (44.59 km/h) |
| 35 mph (56.33 km/h) | 32.33 mph (52.02 km/h) |
| 40 mph (64.37 km/h) | 36.94 mph (59.46 km/h) |
| 45 mph (72.42 km/h) | 41.56 mph (66.89 km/h) |
| 50 mph (80.47 km/h) | 46.18 mph (74.32 km/h) |
| 55 mph (88.51 km/h) | 50.8 mph (81.75 km/h) |
| 60 mph (96.56 km/h) | 55.42 mph (89.18 km/h) |
| 65 mph (104.61 km/h) | 60.03 mph (96.62 km/h) |
| 70 mph (112.65 km/h) | 64.65 mph (104.05 km/h) |
| 75 mph (120.7 km/h) | 69.27 mph (111.48 km/h) |
| 80 mph (128.75 km/h) | 73.89 mph (118.91 km/h) |
| 85 mph (136.79 km/h) | 78.51 mph (126.34 km/h) |
| 90 mph (144.84 km/h) | 83.12 mph (133.78 km/h) |
| 95 mph (152.89 km/h) | 87.74 mph (141.21 km/h) |
| 100 mph (160.93 km/h) | 92.36 mph (148.64 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
