Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-12 | 145/70-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.5 (520.8) | 20.99 (533.2) | 0.49 (12.4) 2.4% |
| Width inches (mm) | 5.31 (135) | 5.71 (145) | 0.39 (10) 7.4% |
| Circum. inches (mm) | 64.42 (1636.14) | 65.95 (1675.1) | 1.53 (38.96) 2.4% |
| Sidewall Height inches (mm) | 4.25 (108) | 4 (101.5) | -0.26 (-6.5) -6% |
| Revolutions per mile (km) | 983.62 (611.19) | 960.75 (596.98) | -22.87 (-14.21) -2.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.48 mph (32.95 km/h) |
| 25 mph (40.23 km/h) | 25.6 mph (41.19 km/h) |
| 30 mph (48.28 km/h) | 30.71 mph (49.43 km/h) |
| 35 mph (56.33 km/h) | 35.83 mph (57.67 km/h) |
| 40 mph (64.37 km/h) | 40.95 mph (65.91 km/h) |
| 45 mph (72.42 km/h) | 46.07 mph (74.14 km/h) |
| 50 mph (80.47 km/h) | 51.19 mph (82.38 km/h) |
| 55 mph (88.51 km/h) | 56.31 mph (90.62 km/h) |
| 60 mph (96.56 km/h) | 61.43 mph (98.86 km/h) |
| 65 mph (104.61 km/h) | 66.55 mph (107.1 km/h) |
| 70 mph (112.65 km/h) | 71.67 mph (115.34 km/h) |
| 75 mph (120.7 km/h) | 76.79 mph (123.57 km/h) |
| 80 mph (128.75 km/h) | 81.9 mph (131.81 km/h) |
| 85 mph (136.79 km/h) | 87.02 mph (140.05 km/h) |
| 90 mph (144.84 km/h) | 92.14 mph (148.29 km/h) |
| 95 mph (152.89 km/h) | 97.26 mph (156.53 km/h) |
| 100 mph (160.93 km/h) | 102.38 mph (164.77 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
