Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/70-12 | 145/80-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.65 (549.8) | 21.13 (536.8) | -0.51 (-13) -2.4% |
| Width inches (mm) | 6.89 (175) | 5.71 (145) | -1.18 (-30) -17.1% |
| Circum. inches (mm) | 68 (1727.25) | 66.39 (1686.41) | -1.61 (-40.84) -2.4% |
| Sidewall Height inches (mm) | 4.82 (122.5) | 4.57 (116) | -0.26 (-6.5) -5.3% |
| Revolutions per mile (km) | 931.74 (578.95) | 954.3 (592.98) | 22.56 (14.02) 2.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.53 mph (31.43 km/h) |
| 25 mph (40.23 km/h) | 24.41 mph (39.28 km/h) |
| 30 mph (48.28 km/h) | 29.29 mph (47.14 km/h) |
| 35 mph (56.33 km/h) | 34.17 mph (55 km/h) |
| 40 mph (64.37 km/h) | 39.05 mph (62.85 km/h) |
| 45 mph (72.42 km/h) | 43.94 mph (70.71 km/h) |
| 50 mph (80.47 km/h) | 48.82 mph (78.56 km/h) |
| 55 mph (88.51 km/h) | 53.7 mph (86.42 km/h) |
| 60 mph (96.56 km/h) | 58.58 mph (94.28 km/h) |
| 65 mph (104.61 km/h) | 63.46 mph (102.13 km/h) |
| 70 mph (112.65 km/h) | 68.34 mph (109.99 km/h) |
| 75 mph (120.7 km/h) | 73.23 mph (117.85 km/h) |
| 80 mph (128.75 km/h) | 78.11 mph (125.7 km/h) |
| 85 mph (136.79 km/h) | 82.99 mph (133.56 km/h) |
| 90 mph (144.84 km/h) | 87.87 mph (141.42 km/h) |
| 95 mph (152.89 km/h) | 92.75 mph (149.27 km/h) |
| 100 mph (160.93 km/h) | 97.64 mph (157.13 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
