Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-12 | 125/75-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.5 (520.8) | 19.38 (492.3) | -1.12 (-28.5) -5.5% |
| Width inches (mm) | 5.31 (135) | 4.92 (125) | -0.39 (-10) -7.4% |
| Circum. inches (mm) | 64.42 (1636.14) | 60.89 (1546.61) | -3.53 (-89.54) -5.5% |
| Sidewall Height inches (mm) | 4.25 (108) | 3.69 (93.75) | -0.56 (-14.25) -13.2% |
| Revolutions per mile (km) | 983.62 (611.19) | 1040.56 (646.58) | 56.94 (35.38) 5.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.91 mph (30.43 km/h) |
| 25 mph (40.23 km/h) | 23.63 mph (38.03 km/h) |
| 30 mph (48.28 km/h) | 28.36 mph (45.64 km/h) |
| 35 mph (56.33 km/h) | 33.08 mph (53.24 km/h) |
| 40 mph (64.37 km/h) | 37.81 mph (60.85 km/h) |
| 45 mph (72.42 km/h) | 42.54 mph (68.46 km/h) |
| 50 mph (80.47 km/h) | 47.26 mph (76.06 km/h) |
| 55 mph (88.51 km/h) | 51.99 mph (83.67 km/h) |
| 60 mph (96.56 km/h) | 56.72 mph (91.28 km/h) |
| 65 mph (104.61 km/h) | 61.44 mph (98.88 km/h) |
| 70 mph (112.65 km/h) | 66.17 mph (106.49 km/h) |
| 75 mph (120.7 km/h) | 70.9 mph (114.1 km/h) |
| 80 mph (128.75 km/h) | 75.62 mph (121.7 km/h) |
| 85 mph (136.79 km/h) | 80.35 mph (129.31 km/h) |
| 90 mph (144.84 km/h) | 85.07 mph (136.92 km/h) |
| 95 mph (152.89 km/h) | 89.8 mph (144.52 km/h) |
| 100 mph (160.93 km/h) | 94.53 mph (152.13 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
