Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/30-20 | 275/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.31 (643) | 26.5 (673) | 1.18 (30) 4.7% |
| Width inches (mm) | 8.86 (225) | 10.83 (275) | 1.97 (50) 22.2% |
| Circum. inches (mm) | 79.53 (2020.04) | 83.24 (2114.29) | 3.71 (94.25) 4.7% |
| Sidewall Height inches (mm) | 2.66 (67.5) | 3.25 (82.5) | 0.59 (15) 22.2% |
| Revolutions per mile (km) | 796.69 (495.04) | 761.17 (472.97) | -35.51 (-22.07) -4.5% |
275/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.93 mph (33.69 km/h) |
| 25 mph (40.23 km/h) | 26.17 mph (42.11 km/h) |
| 30 mph (48.28 km/h) | 31.4 mph (50.53 km/h) |
| 35 mph (56.33 km/h) | 36.63 mph (58.96 km/h) |
| 40 mph (64.37 km/h) | 41.87 mph (67.38 km/h) |
| 45 mph (72.42 km/h) | 47.1 mph (75.8 km/h) |
| 50 mph (80.47 km/h) | 52.33 mph (84.22 km/h) |
| 55 mph (88.51 km/h) | 57.57 mph (92.64 km/h) |
| 60 mph (96.56 km/h) | 62.8 mph (101.07 km/h) |
| 65 mph (104.61 km/h) | 68.03 mph (109.49 km/h) |
| 70 mph (112.65 km/h) | 73.27 mph (117.91 km/h) |
| 75 mph (120.7 km/h) | 78.5 mph (126.33 km/h) |
| 80 mph (128.75 km/h) | 83.73 mph (134.75 km/h) |
| 85 mph (136.79 km/h) | 88.97 mph (143.18 km/h) |
| 90 mph (144.84 km/h) | 94.2 mph (151.6 km/h) |
| 95 mph (152.89 km/h) | 99.43 mph (160.02 km/h) |
| 100 mph (160.93 km/h) | 104.67 mph (168.44 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1937 | 2250 | 2423 | 2531 | 2646 | 2728 | 2819 | 2926 | 3075 | 3223 | 3388 | 3520 | 3759 | 4022 | 4229 | 4360 | 4435 | 4707 | 5086 | 5910 |
Better Fuel Economy Factory Ratios Increased Power
