Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/70-17 | 275/65-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.5 (774.8) | 34.07 (865.5) | 3.57 (90.7) 11.7% |
| Width inches (mm) | 9.65 (245) | 10.83 (275) | 1.18 (30) 12.2% |
| Circum. inches (mm) | 95.83 (2434.11) | 107.05 (2719.05) | 11.22 (284.94) 11.7% |
| Sidewall Height inches (mm) | 6.75 (171.5) | 7.04 (178.75) | 0.29 (7.25) 4.2% |
| Revolutions per mile (km) | 661.16 (410.83) | 591.88 (367.78) | -69.29 (-43.05) -10.5% |
275/65-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.34 mph (35.95 km/h) |
| 25 mph (40.23 km/h) | 27.93 mph (44.94 km/h) |
| 30 mph (48.28 km/h) | 33.51 mph (53.93 km/h) |
| 35 mph (56.33 km/h) | 39.1 mph (62.92 km/h) |
| 40 mph (64.37 km/h) | 44.68 mph (71.91 km/h) |
| 45 mph (72.42 km/h) | 50.27 mph (80.9 km/h) |
| 50 mph (80.47 km/h) | 55.85 mph (89.89 km/h) |
| 55 mph (88.51 km/h) | 61.44 mph (98.88 km/h) |
| 60 mph (96.56 km/h) | 67.02 mph (107.86 km/h) |
| 65 mph (104.61 km/h) | 72.61 mph (116.85 km/h) |
| 70 mph (112.65 km/h) | 78.19 mph (125.84 km/h) |
| 75 mph (120.7 km/h) | 83.78 mph (134.83 km/h) |
| 80 mph (128.75 km/h) | 89.36 mph (143.82 km/h) |
| 85 mph (136.79 km/h) | 94.95 mph (152.81 km/h) |
| 90 mph (144.84 km/h) | 100.54 mph (161.8 km/h) |
| 95 mph (152.89 km/h) | 106.12 mph (170.79 km/h) |
| 100 mph (160.93 km/h) | 111.71 mph (179.77 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1506 | 1750 | 1884 | 1968 | 2057 | 2122 | 2192 | 2275 | 2391 | 2506 | 2634 | 2737 | 2923 | 3128 | 3288 | 3391 | 3448 | 3660 | 3955 | 4596 |
Better Fuel Economy Factory Ratios Increased Power
