Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/50-18 | 275/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.86 (682.2) | 29.91 (759.7) | 3.05 (77.5) 11.4% |
| Width inches (mm) | 8.86 (225) | 10.83 (275) | 1.97 (50) 22.2% |
| Circum. inches (mm) | 84.38 (2143.19) | 93.96 (2386.67) | 9.59 (243.47) 11.4% |
| Sidewall Height inches (mm) | 4.43 (112.5) | 5.95 (151.25) | 1.53 (38.75) 34.4% |
| Revolutions per mile (km) | 750.91 (466.59) | 674.31 (418.99) | -76.6 (-47.6) -10.2% |
275/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.27 mph (35.84 km/h) |
| 25 mph (40.23 km/h) | 27.84 mph (44.8 km/h) |
| 30 mph (48.28 km/h) | 33.41 mph (53.77 km/h) |
| 35 mph (56.33 km/h) | 38.98 mph (62.73 km/h) |
| 40 mph (64.37 km/h) | 44.54 mph (71.69 km/h) |
| 45 mph (72.42 km/h) | 50.11 mph (80.65 km/h) |
| 50 mph (80.47 km/h) | 55.68 mph (89.61 km/h) |
| 55 mph (88.51 km/h) | 61.25 mph (98.57 km/h) |
| 60 mph (96.56 km/h) | 66.82 mph (107.53 km/h) |
| 65 mph (104.61 km/h) | 72.38 mph (116.49 km/h) |
| 70 mph (112.65 km/h) | 77.95 mph (125.45 km/h) |
| 75 mph (120.7 km/h) | 83.52 mph (134.41 km/h) |
| 80 mph (128.75 km/h) | 89.09 mph (143.37 km/h) |
| 85 mph (136.79 km/h) | 94.66 mph (152.33 km/h) |
| 90 mph (144.84 km/h) | 100.22 mph (161.3 km/h) |
| 95 mph (152.89 km/h) | 105.79 mph (170.26 km/h) |
| 100 mph (160.93 km/h) | 111.36 mph (179.22 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1716 | 1993 | 2147 | 2242 | 2344 | 2417 | 2497 | 2592 | 2724 | 2855 | 3001 | 3118 | 3330 | 3563 | 3746 | 3863 | 3928 | 4169 | 4505 | 5236 |
Better Fuel Economy Factory Ratios Increased Power
