Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-12 | 135/70-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.5 (520.8) | 19.44 (493.8) | -1.06 (-27) -5.2% |
| Width inches (mm) | 5.31 (135) | 5.31 (135) | 0 (0) 0% |
| Circum. inches (mm) | 64.42 (1636.14) | 61.08 (1551.32) | -3.34 (-84.82) -5.2% |
| Sidewall Height inches (mm) | 4.25 (108) | 3.72 (94.5) | -0.53 (-13.5) -12.5% |
| Revolutions per mile (km) | 983.62 (611.19) | 1037.4 (644.61) | 53.78 (33.42) 5.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.96 mph (30.52 km/h) |
| 25 mph (40.23 km/h) | 23.7 mph (38.15 km/h) |
| 30 mph (48.28 km/h) | 28.44 mph (45.78 km/h) |
| 35 mph (56.33 km/h) | 33.19 mph (53.41 km/h) |
| 40 mph (64.37 km/h) | 37.93 mph (61.04 km/h) |
| 45 mph (72.42 km/h) | 42.67 mph (68.67 km/h) |
| 50 mph (80.47 km/h) | 47.41 mph (76.3 km/h) |
| 55 mph (88.51 km/h) | 52.15 mph (83.93 km/h) |
| 60 mph (96.56 km/h) | 56.89 mph (91.55 km/h) |
| 65 mph (104.61 km/h) | 61.63 mph (99.18 km/h) |
| 70 mph (112.65 km/h) | 66.37 mph (106.81 km/h) |
| 75 mph (120.7 km/h) | 71.11 mph (114.44 km/h) |
| 80 mph (128.75 km/h) | 75.85 mph (122.07 km/h) |
| 85 mph (136.79 km/h) | 80.59 mph (129.7 km/h) |
| 90 mph (144.84 km/h) | 85.33 mph (137.33 km/h) |
| 95 mph (152.89 km/h) | 90.07 mph (144.96 km/h) |
| 100 mph (160.93 km/h) | 94.82 mph (152.59 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
