Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/70-12 | 155/80-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.54 (521.8) | 21.76 (552.8) | 1.22 (31) 5.9% |
| Width inches (mm) | 6.1 (155) | 6.1 (155) | 0 (0) 0% |
| Circum. inches (mm) | 64.54 (1639.28) | 68.37 (1736.67) | 3.83 (97.39) 5.9% |
| Sidewall Height inches (mm) | 4.27 (108.5) | 4.88 (124) | 0.61 (15.5) 14.3% |
| Revolutions per mile (km) | 981.74 (610.02) | 926.68 (575.81) | -55.05 (-34.21) -5.6% |
155/80-12 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.19 mph (34.1 km/h) |
| 25 mph (40.23 km/h) | 26.49 mph (42.62 km/h) |
| 30 mph (48.28 km/h) | 31.78 mph (51.15 km/h) |
| 35 mph (56.33 km/h) | 37.08 mph (59.67 km/h) |
| 40 mph (64.37 km/h) | 42.38 mph (68.2 km/h) |
| 45 mph (72.42 km/h) | 47.67 mph (76.72 km/h) |
| 50 mph (80.47 km/h) | 52.97 mph (85.25 km/h) |
| 55 mph (88.51 km/h) | 58.27 mph (93.77 km/h) |
| 60 mph (96.56 km/h) | 63.56 mph (102.3 km/h) |
| 65 mph (104.61 km/h) | 68.86 mph (110.82 km/h) |
| 70 mph (112.65 km/h) | 74.16 mph (119.35 km/h) |
| 75 mph (120.7 km/h) | 79.46 mph (127.87 km/h) |
| 80 mph (128.75 km/h) | 84.75 mph (136.4 km/h) |
| 85 mph (136.79 km/h) | 90.05 mph (144.92 km/h) |
| 90 mph (144.84 km/h) | 95.35 mph (153.45 km/h) |
| 95 mph (152.89 km/h) | 100.64 mph (161.97 km/h) |
| 100 mph (160.93 km/h) | 105.94 mph (170.5 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
