Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-13 | 275/80-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.5 (546.2) | 37.32 (948) | 15.82 (401.8) 73.6% |
| Width inches (mm) | 5.31 (135) | 10.83 (275) | 5.51 (140) 103.7% |
| Circum. inches (mm) | 67.56 (1715.94) | 117.25 (2978.23) | 49.7 (1262.29) 73.6% |
| Sidewall Height inches (mm) | 4.25 (108) | 8.66 (220) | 4.41 (112) 103.7% |
| Revolutions per mile (km) | 937.88 (582.77) | 540.37 (335.77) | -397.51 (-247) -42.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 34.71 mph (55.86 km/h) |
| 25 mph (40.23 km/h) | 43.39 mph (69.83 km/h) |
| 30 mph (48.28 km/h) | 52.07 mph (83.8 km/h) |
| 35 mph (56.33 km/h) | 60.75 mph (97.76 km/h) |
| 40 mph (64.37 km/h) | 69.43 mph (111.73 km/h) |
| 45 mph (72.42 km/h) | 78.1 mph (125.7 km/h) |
| 50 mph (80.47 km/h) | 86.78 mph (139.66 km/h) |
| 55 mph (88.51 km/h) | 95.46 mph (153.63 km/h) |
| 60 mph (96.56 km/h) | 104.14 mph (167.59 km/h) |
| 65 mph (104.61 km/h) | 112.82 mph (181.56 km/h) |
| 70 mph (112.65 km/h) | 121.49 mph (195.53 km/h) |
| 75 mph (120.7 km/h) | 130.17 mph (209.49 km/h) |
| 80 mph (128.75 km/h) | 138.85 mph (223.46 km/h) |
| 85 mph (136.79 km/h) | 147.53 mph (237.42 km/h) |
| 90 mph (144.84 km/h) | 156.21 mph (251.39 km/h) |
| 95 mph (152.89 km/h) | 164.88 mph (265.36 km/h) |
| 100 mph (160.93 km/h) | 173.56 mph (279.32 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1375 | 1597 | 1720 | 1796 | 1878 | 1937 | 2001 | 2077 | 2183 | 2288 | 2405 | 2499 | 2668 | 2856 | 3002 | 3096 | 3148 | 3341 | 3610 | 4196 |
Better Fuel Economy Factory Ratios Increased Power
