Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/30-20 | 240/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.5 (673) | 25.67 (652) | -0.83 (-21) -3.1% |
| Width inches (mm) | 10.83 (275) | 9.45 (240) | -1.38 (-35) -12.7% |
| Circum. inches (mm) | 83.24 (2114.29) | 80.64 (2048.32) | -2.6 (-65.97) -3.1% |
| Sidewall Height inches (mm) | 3.25 (82.5) | 2.83 (72) | -0.41 (-10.5) -12.7% |
| Revolutions per mile (km) | 761.17 (472.97) | 785.69 (488.2) | 24.52 (15.23) 3.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.38 mph (31.18 km/h) |
| 25 mph (40.23 km/h) | 24.22 mph (38.98 km/h) |
| 30 mph (48.28 km/h) | 29.06 mph (46.77 km/h) |
| 35 mph (56.33 km/h) | 33.91 mph (54.57 km/h) |
| 40 mph (64.37 km/h) | 38.75 mph (62.37 km/h) |
| 45 mph (72.42 km/h) | 43.6 mph (70.16 km/h) |
| 50 mph (80.47 km/h) | 48.44 mph (77.96 km/h) |
| 55 mph (88.51 km/h) | 53.28 mph (85.75 km/h) |
| 60 mph (96.56 km/h) | 58.13 mph (93.55 km/h) |
| 65 mph (104.61 km/h) | 62.97 mph (101.34 km/h) |
| 70 mph (112.65 km/h) | 67.82 mph (109.14 km/h) |
| 75 mph (120.7 km/h) | 72.66 mph (116.93 km/h) |
| 80 mph (128.75 km/h) | 77.5 mph (124.73 km/h) |
| 85 mph (136.79 km/h) | 82.35 mph (132.53 km/h) |
| 90 mph (144.84 km/h) | 87.19 mph (140.32 km/h) |
| 95 mph (152.89 km/h) | 92.04 mph (148.12 km/h) |
| 100 mph (160.93 km/h) | 96.88 mph (155.91 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1999 | 2323 | 2501 | 2612 | 2731 | 2816 | 2910 | 3020 | 3174 | 3327 | 3497 | 3633 | 3880 | 4152 | 4365 | 4501 | 4577 | 4858 | 5250 | 6100 |
Better Fuel Economy Factory Ratios Increased Power
