Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/25-20 | 32/11.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.41 (645.5) | 31.96 (811.68) | 6.54 (166.18) 25.7% |
| Width inches (mm) | 10.83 (275) | 11.5 (292) | 0.67 (17) 6.2% |
| Circum. inches (mm) | 79.84 (2027.9) | 100.39 (2549.97) | 20.55 (522.07) 25.7% |
| Sidewall Height inches (mm) | 2.71 (68.75) | 5.98 (151.84) | 3.27 (83.09) 120.9% |
| Revolutions per mile (km) | 793.6 (493.12) | 631.12 (392.16) | -162.48 (-100.96) -20.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 25.15 mph (40.47 km/h) |
| 25 mph (40.23 km/h) | 31.44 mph (50.59 km/h) |
| 30 mph (48.28 km/h) | 37.72 mph (60.71 km/h) |
| 35 mph (56.33 km/h) | 44.01 mph (70.83 km/h) |
| 40 mph (64.37 km/h) | 50.3 mph (80.95 km/h) |
| 45 mph (72.42 km/h) | 56.58 mph (91.06 km/h) |
| 50 mph (80.47 km/h) | 62.87 mph (101.18 km/h) |
| 55 mph (88.51 km/h) | 69.16 mph (111.3 km/h) |
| 60 mph (96.56 km/h) | 75.45 mph (121.42 km/h) |
| 65 mph (104.61 km/h) | 81.73 mph (131.54 km/h) |
| 70 mph (112.65 km/h) | 88.02 mph (141.66 km/h) |
| 75 mph (120.7 km/h) | 94.31 mph (151.77 km/h) |
| 80 mph (128.75 km/h) | 100.6 mph (161.89 km/h) |
| 85 mph (136.79 km/h) | 106.88 mph (172.01 km/h) |
| 90 mph (144.84 km/h) | 113.17 mph (182.13 km/h) |
| 95 mph (152.89 km/h) | 119.46 mph (192.25 km/h) |
| 100 mph (160.93 km/h) | 125.74 mph (202.37 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1606 | 1866 | 2009 | 2098 | 2194 | 2262 | 2337 | 2426 | 2549 | 2672 | 2809 | 2918 | 3116 | 3335 | 3506 | 3615 | 3677 | 3902 | 4217 | 4900 |
Better Fuel Economy Factory Ratios Increased Power
