Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-12 | 165/45-14 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.5 (520.8) | 19.85 (504.1) | -0.66 (-16.7) -3.2% |
| Width inches (mm) | 5.31 (135) | 6.5 (165) | 1.18 (30) 22.2% |
| Circum. inches (mm) | 64.42 (1636.14) | 62.35 (1583.68) | -2.07 (-52.46) -3.2% |
| Sidewall Height inches (mm) | 4.25 (108) | 2.92 (74.25) | -1.33 (-33.75) -31.3% |
| Revolutions per mile (km) | 983.62 (611.19) | 1016.21 (631.44) | 32.59 (20.25) 3.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.36 mph (31.15 km/h) |
| 25 mph (40.23 km/h) | 24.2 mph (38.94 km/h) |
| 30 mph (48.28 km/h) | 29.04 mph (46.73 km/h) |
| 35 mph (56.33 km/h) | 33.88 mph (54.52 km/h) |
| 40 mph (64.37 km/h) | 38.72 mph (62.31 km/h) |
| 45 mph (72.42 km/h) | 43.56 mph (70.1 km/h) |
| 50 mph (80.47 km/h) | 48.4 mph (77.89 km/h) |
| 55 mph (88.51 km/h) | 53.24 mph (85.68 km/h) |
| 60 mph (96.56 km/h) | 58.08 mph (93.46 km/h) |
| 65 mph (104.61 km/h) | 62.92 mph (101.25 km/h) |
| 70 mph (112.65 km/h) | 67.76 mph (109.04 km/h) |
| 75 mph (120.7 km/h) | 72.6 mph (116.83 km/h) |
| 80 mph (128.75 km/h) | 77.43 mph (124.62 km/h) |
| 85 mph (136.79 km/h) | 82.27 mph (132.41 km/h) |
| 90 mph (144.84 km/h) | 87.11 mph (140.2 km/h) |
| 95 mph (152.89 km/h) | 91.95 mph (147.99 km/h) |
| 100 mph (160.93 km/h) | 96.79 mph (155.77 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
