Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/55-20 | 255/60-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.04 (788.5) | 32.05 (814) | 1 (25.5) 3.2% |
| Width inches (mm) | 10.04 (255) | 10.04 (255) | 0 (0) 0% |
| Circum. inches (mm) | 97.53 (2477.15) | 100.68 (2557.26) | 3.15 (80.11) 3.2% |
| Sidewall Height inches (mm) | 5.52 (140.25) | 6.02 (153) | 0.5 (12.75) 9.1% |
| Revolutions per mile (km) | 649.68 (403.69) | 629.32 (391.04) | -20.35 (-12.65) -3.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.65 mph (33.23 km/h) |
| 25 mph (40.23 km/h) | 25.81 mph (41.53 km/h) |
| 30 mph (48.28 km/h) | 30.97 mph (49.84 km/h) |
| 35 mph (56.33 km/h) | 36.13 mph (58.15 km/h) |
| 40 mph (64.37 km/h) | 41.29 mph (66.46 km/h) |
| 45 mph (72.42 km/h) | 46.46 mph (74.76 km/h) |
| 50 mph (80.47 km/h) | 51.62 mph (83.07 km/h) |
| 55 mph (88.51 km/h) | 56.78 mph (91.38 km/h) |
| 60 mph (96.56 km/h) | 61.94 mph (99.68 km/h) |
| 65 mph (104.61 km/h) | 67.1 mph (107.99 km/h) |
| 70 mph (112.65 km/h) | 72.26 mph (116.3 km/h) |
| 75 mph (120.7 km/h) | 77.43 mph (124.6 km/h) |
| 80 mph (128.75 km/h) | 82.59 mph (132.91 km/h) |
| 85 mph (136.79 km/h) | 87.75 mph (141.22 km/h) |
| 90 mph (144.84 km/h) | 92.91 mph (149.53 km/h) |
| 95 mph (152.89 km/h) | 98.07 mph (157.83 km/h) |
| 100 mph (160.93 km/h) | 103.23 mph (166.14 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1602 | 1860 | 2004 | 2092 | 2188 | 2256 | 2331 | 2419 | 2542 | 2665 | 2801 | 2910 | 3108 | 3326 | 3496 | 3605 | 3666 | 3891 | 4205 | 4886 |
Better Fuel Economy Factory Ratios Increased Power
