Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/40-23 | 440/80-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.61 (828.2) | 47.72 (1212) | 15.11 (383.8) 46.3% |
| Width inches (mm) | 12.01 (305) | 17.32 (440) | 5.31 (135) 44.3% |
| Circum. inches (mm) | 102.44 (2601.87) | 149.91 (3807.61) | 47.47 (1205.74) 46.3% |
| Sidewall Height inches (mm) | 4.8 (122) | 13.86 (352) | 9.06 (230) 188.5% |
| Revolutions per mile (km) | 618.53 (384.34) | 422.67 (262.63) | -195.87 (-121.71) -31.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 29.27 mph (47.1 km/h) |
| 25 mph (40.23 km/h) | 36.59 mph (58.88 km/h) |
| 30 mph (48.28 km/h) | 43.9 mph (70.65 km/h) |
| 35 mph (56.33 km/h) | 51.22 mph (82.43 km/h) |
| 40 mph (64.37 km/h) | 58.54 mph (94.21 km/h) |
| 45 mph (72.42 km/h) | 65.85 mph (105.98 km/h) |
| 50 mph (80.47 km/h) | 73.17 mph (117.76 km/h) |
| 55 mph (88.51 km/h) | 80.49 mph (129.53 km/h) |
| 60 mph (96.56 km/h) | 87.8 mph (141.31 km/h) |
| 65 mph (104.61 km/h) | 95.12 mph (153.08 km/h) |
| 70 mph (112.65 km/h) | 102.44 mph (164.86 km/h) |
| 75 mph (120.7 km/h) | 109.76 mph (176.64 km/h) |
| 80 mph (128.75 km/h) | 117.07 mph (188.41 km/h) |
| 85 mph (136.79 km/h) | 124.39 mph (200.19 km/h) |
| 90 mph (144.84 km/h) | 131.71 mph (211.96 km/h) |
| 95 mph (152.89 km/h) | 139.02 mph (223.74 km/h) |
| 100 mph (160.93 km/h) | 146.34 mph (235.51 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
