Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-12 | 135/85-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.5 (520.8) | 21.04 (534.3) | 0.53 (13.5) 2.6% |
| Width inches (mm) | 5.31 (135) | 5.31 (135) | 0 (0) 0% |
| Circum. inches (mm) | 64.42 (1636.14) | 66.08 (1678.55) | 1.67 (42.41) 2.6% |
| Sidewall Height inches (mm) | 4.25 (108) | 4.52 (114.75) | 0.27 (6.75) 6.3% |
| Revolutions per mile (km) | 983.62 (611.19) | 958.77 (595.75) | -24.85 (-15.44) -2.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.52 mph (33.02 km/h) |
| 25 mph (40.23 km/h) | 25.65 mph (41.28 km/h) |
| 30 mph (48.28 km/h) | 30.78 mph (49.53 km/h) |
| 35 mph (56.33 km/h) | 35.91 mph (57.79 km/h) |
| 40 mph (64.37 km/h) | 41.04 mph (66.04 km/h) |
| 45 mph (72.42 km/h) | 46.17 mph (74.3 km/h) |
| 50 mph (80.47 km/h) | 51.3 mph (82.55 km/h) |
| 55 mph (88.51 km/h) | 56.43 mph (90.81 km/h) |
| 60 mph (96.56 km/h) | 61.56 mph (99.06 km/h) |
| 65 mph (104.61 km/h) | 66.68 mph (107.32 km/h) |
| 70 mph (112.65 km/h) | 71.81 mph (115.57 km/h) |
| 75 mph (120.7 km/h) | 76.94 mph (123.83 km/h) |
| 80 mph (128.75 km/h) | 82.07 mph (132.09 km/h) |
| 85 mph (136.79 km/h) | 87.2 mph (140.34 km/h) |
| 90 mph (144.84 km/h) | 92.33 mph (148.6 km/h) |
| 95 mph (152.89 km/h) | 97.46 mph (156.85 km/h) |
| 100 mph (160.93 km/h) | 102.59 mph (165.11 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
