Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/80-12 | 145/70-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.76 (552.8) | 19.99 (507.8) | -1.77 (-45) -8.1% |
| Width inches (mm) | 6.1 (155) | 5.71 (145) | -0.39 (-10) -6.5% |
| Circum. inches (mm) | 68.37 (1736.67) | 62.81 (1595.3) | -5.57 (-141.37) -8.1% |
| Sidewall Height inches (mm) | 4.88 (124) | 4 (101.5) | -0.89 (-22.5) -18.1% |
| Revolutions per mile (km) | 926.68 (575.81) | 1008.8 (626.84) | 82.12 (51.03) 8.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.37 mph (29.57 km/h) |
| 25 mph (40.23 km/h) | 22.96 mph (36.96 km/h) |
| 30 mph (48.28 km/h) | 27.56 mph (44.35 km/h) |
| 35 mph (56.33 km/h) | 32.15 mph (51.74 km/h) |
| 40 mph (64.37 km/h) | 36.74 mph (59.13 km/h) |
| 45 mph (72.42 km/h) | 41.34 mph (66.53 km/h) |
| 50 mph (80.47 km/h) | 45.93 mph (73.92 km/h) |
| 55 mph (88.51 km/h) | 50.52 mph (81.31 km/h) |
| 60 mph (96.56 km/h) | 55.12 mph (88.7 km/h) |
| 65 mph (104.61 km/h) | 59.71 mph (96.09 km/h) |
| 70 mph (112.65 km/h) | 64.3 mph (103.48 km/h) |
| 75 mph (120.7 km/h) | 68.89 mph (110.88 km/h) |
| 80 mph (128.75 km/h) | 73.49 mph (118.27 km/h) |
| 85 mph (136.79 km/h) | 78.08 mph (125.66 km/h) |
| 90 mph (144.84 km/h) | 82.67 mph (133.05 km/h) |
| 95 mph (152.89 km/h) | 87.27 mph (140.44 km/h) |
| 100 mph (160.93 km/h) | 91.86 mph (147.83 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
