Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/55-20 | 325/50-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 31.91 (810.5) | 32.8 (833) | 0.89 (22.5) 2.8% |
| Width inches (mm) | 10.83 (275) | 12.8 (325) | 1.97 (50) 18.2% |
| Circum. inches (mm) | 100.25 (2546.26) | 103.03 (2616.95) | 2.78 (70.69) 2.8% |
| Sidewall Height inches (mm) | 5.95 (151.25) | 6.4 (162.5) | 0.44 (11.25) 7.4% |
| Revolutions per mile (km) | 632.04 (392.73) | 614.97 (382.12) | -17.07 (-10.61) -2.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.56 mph (33.08 km/h) |
| 25 mph (40.23 km/h) | 25.69 mph (41.35 km/h) |
| 30 mph (48.28 km/h) | 30.83 mph (49.62 km/h) |
| 35 mph (56.33 km/h) | 35.97 mph (57.89 km/h) |
| 40 mph (64.37 km/h) | 41.11 mph (66.16 km/h) |
| 45 mph (72.42 km/h) | 46.25 mph (74.43 km/h) |
| 50 mph (80.47 km/h) | 51.39 mph (82.7 km/h) |
| 55 mph (88.51 km/h) | 56.53 mph (90.97 km/h) |
| 60 mph (96.56 km/h) | 61.67 mph (99.24 km/h) |
| 65 mph (104.61 km/h) | 66.8 mph (107.51 km/h) |
| 70 mph (112.65 km/h) | 71.94 mph (115.78 km/h) |
| 75 mph (120.7 km/h) | 77.08 mph (124.05 km/h) |
| 80 mph (128.75 km/h) | 82.22 mph (132.32 km/h) |
| 85 mph (136.79 km/h) | 87.36 mph (140.59 km/h) |
| 90 mph (144.84 km/h) | 92.5 mph (148.86 km/h) |
| 95 mph (152.89 km/h) | 97.64 mph (157.13 km/h) |
| 100 mph (160.93 km/h) | 102.78 mph (165.4 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1565 | 1818 | 1958 | 2044 | 2138 | 2204 | 2278 | 2364 | 2484 | 2604 | 2737 | 2844 | 3037 | 3250 | 3416 | 3523 | 3583 | 3803 | 4109 | 4775 |
Better Fuel Economy Factory Ratios Increased Power
