Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/45-20 | 225/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.74 (755.5) | 29.52 (749.7) | -0.23 (-5.8) -0.8% |
| Width inches (mm) | 10.83 (275) | 8.86 (225) | -1.97 (-50) -18.2% |
| Circum. inches (mm) | 93.44 (2373.47) | 92.73 (2355.25) | -0.72 (-18.22) -0.8% |
| Sidewall Height inches (mm) | 4.87 (123.75) | 5.76 (146.25) | 0.89 (22.5) 18.2% |
| Revolutions per mile (km) | 678.05 (421.32) | 683.3 (424.58) | 5.25 (3.26) 0.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.85 mph (31.94 km/h) |
| 25 mph (40.23 km/h) | 24.81 mph (39.92 km/h) |
| 30 mph (48.28 km/h) | 29.77 mph (47.91 km/h) |
| 35 mph (56.33 km/h) | 34.73 mph (55.89 km/h) |
| 40 mph (64.37 km/h) | 39.69 mph (63.88 km/h) |
| 45 mph (72.42 km/h) | 44.65 mph (71.86 km/h) |
| 50 mph (80.47 km/h) | 49.62 mph (79.85 km/h) |
| 55 mph (88.51 km/h) | 54.58 mph (87.83 km/h) |
| 60 mph (96.56 km/h) | 59.54 mph (95.82 km/h) |
| 65 mph (104.61 km/h) | 64.5 mph (103.8 km/h) |
| 70 mph (112.65 km/h) | 69.46 mph (111.79 km/h) |
| 75 mph (120.7 km/h) | 74.42 mph (119.77 km/h) |
| 80 mph (128.75 km/h) | 79.39 mph (127.76 km/h) |
| 85 mph (136.79 km/h) | 84.35 mph (135.74 km/h) |
| 90 mph (144.84 km/h) | 89.31 mph (143.73 km/h) |
| 95 mph (152.89 km/h) | 94.27 mph (151.71 km/h) |
| 100 mph (160.93 km/h) | 99.23 mph (159.7 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1739 | 2020 | 2175 | 2272 | 2375 | 2449 | 2531 | 2627 | 2760 | 2893 | 3041 | 3160 | 3374 | 3611 | 3796 | 3914 | 3981 | 4225 | 4565 | 5305 |
Better Fuel Economy Factory Ratios Increased Power
