Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/55-12 | 155/80-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 19.15 (486.3) | 21.76 (552.8) | 2.62 (66.5) 13.7% |
| Width inches (mm) | 6.5 (165) | 6.1 (155) | -0.39 (-10) -6.1% |
| Circum. inches (mm) | 60.15 (1527.76) | 68.37 (1736.67) | 8.23 (208.92) 13.7% |
| Sidewall Height inches (mm) | 3.57 (90.75) | 4.88 (124) | 1.31 (33.25) 36.6% |
| Revolutions per mile (km) | 1053.4 (654.55) | 926.68 (575.81) | -126.72 (-78.74) -12% |
155/80-12 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.73 mph (36.59 km/h) |
| 25 mph (40.23 km/h) | 28.42 mph (45.74 km/h) |
| 30 mph (48.28 km/h) | 34.1 mph (54.88 km/h) |
| 35 mph (56.33 km/h) | 39.79 mph (64.03 km/h) |
| 40 mph (64.37 km/h) | 45.47 mph (73.18 km/h) |
| 45 mph (72.42 km/h) | 51.15 mph (82.32 km/h) |
| 50 mph (80.47 km/h) | 56.84 mph (91.47 km/h) |
| 55 mph (88.51 km/h) | 62.52 mph (100.62 km/h) |
| 60 mph (96.56 km/h) | 68.2 mph (109.77 km/h) |
| 65 mph (104.61 km/h) | 73.89 mph (118.91 km/h) |
| 70 mph (112.65 km/h) | 79.57 mph (128.06 km/h) |
| 75 mph (120.7 km/h) | 85.26 mph (137.21 km/h) |
| 80 mph (128.75 km/h) | 90.94 mph (146.35 km/h) |
| 85 mph (136.79 km/h) | 96.62 mph (155.5 km/h) |
| 90 mph (144.84 km/h) | 102.31 mph (164.65 km/h) |
| 95 mph (152.89 km/h) | 107.99 mph (173.79 km/h) |
| 100 mph (160.93 km/h) | 113.67 mph (182.94 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
