Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-12 | 155/55-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.5 (520.8) | 19.71 (500.7) | -0.79 (-20.1) -3.9% |
| Width inches (mm) | 5.31 (135) | 6.1 (155) | 0.79 (20) 14.8% |
| Circum. inches (mm) | 64.42 (1636.14) | 61.93 (1573) | -2.49 (-63.15) -3.9% |
| Sidewall Height inches (mm) | 4.25 (108) | 3.36 (85.25) | -0.9 (-22.75) -21.1% |
| Revolutions per mile (km) | 983.62 (611.19) | 1023.11 (635.73) | 39.49 (24.54) 4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.23 mph (30.94 km/h) |
| 25 mph (40.23 km/h) | 24.04 mph (38.68 km/h) |
| 30 mph (48.28 km/h) | 28.84 mph (46.42 km/h) |
| 35 mph (56.33 km/h) | 33.65 mph (54.15 km/h) |
| 40 mph (64.37 km/h) | 38.46 mph (61.89 km/h) |
| 45 mph (72.42 km/h) | 43.26 mph (69.63 km/h) |
| 50 mph (80.47 km/h) | 48.07 mph (77.36 km/h) |
| 55 mph (88.51 km/h) | 52.88 mph (85.1 km/h) |
| 60 mph (96.56 km/h) | 57.68 mph (92.83 km/h) |
| 65 mph (104.61 km/h) | 62.49 mph (100.57 km/h) |
| 70 mph (112.65 km/h) | 67.3 mph (108.31 km/h) |
| 75 mph (120.7 km/h) | 72.11 mph (116.04 km/h) |
| 80 mph (128.75 km/h) | 76.91 mph (123.78 km/h) |
| 85 mph (136.79 km/h) | 81.72 mph (131.51 km/h) |
| 90 mph (144.84 km/h) | 86.53 mph (139.25 km/h) |
| 95 mph (152.89 km/h) | 91.33 mph (146.99 km/h) |
| 100 mph (160.93 km/h) | 96.14 mph (154.72 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
