Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/55-18 | 275/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.74 (704.7) | 33.16 (842.2) | 5.41 (137.5) 19.5% |
| Width inches (mm) | 8.86 (225) | 10.83 (275) | 1.97 (50) 22.2% |
| Circum. inches (mm) | 87.16 (2213.88) | 104.17 (2645.85) | 17.01 (431.97) 19.5% |
| Sidewall Height inches (mm) | 4.87 (123.75) | 7.58 (192.5) | 2.71 (68.75) 55.6% |
| Revolutions per mile (km) | 726.93 (451.69) | 608.25 (377.95) | -118.68 (-73.74) -16.3% |
275/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.9 mph (38.47 km/h) |
| 25 mph (40.23 km/h) | 29.88 mph (48.08 km/h) |
| 30 mph (48.28 km/h) | 35.85 mph (57.7 km/h) |
| 35 mph (56.33 km/h) | 41.83 mph (67.32 km/h) |
| 40 mph (64.37 km/h) | 47.8 mph (76.93 km/h) |
| 45 mph (72.42 km/h) | 53.78 mph (86.55 km/h) |
| 50 mph (80.47 km/h) | 59.76 mph (96.17 km/h) |
| 55 mph (88.51 km/h) | 65.73 mph (105.78 km/h) |
| 60 mph (96.56 km/h) | 71.71 mph (115.4 km/h) |
| 65 mph (104.61 km/h) | 77.68 mph (125.02 km/h) |
| 70 mph (112.65 km/h) | 83.66 mph (134.64 km/h) |
| 75 mph (120.7 km/h) | 89.63 mph (144.25 km/h) |
| 80 mph (128.75 km/h) | 95.61 mph (153.87 km/h) |
| 85 mph (136.79 km/h) | 101.59 mph (163.49 km/h) |
| 90 mph (144.84 km/h) | 107.56 mph (173.1 km/h) |
| 95 mph (152.89 km/h) | 113.54 mph (182.72 km/h) |
| 100 mph (160.93 km/h) | 119.51 mph (192.34 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1548 | 1798 | 1937 | 2022 | 2114 | 2180 | 2253 | 2338 | 2457 | 2575 | 2707 | 2813 | 3004 | 3214 | 3379 | 3484 | 3544 | 3761 | 4064 | 4723 |
Better Fuel Economy Factory Ratios Increased Power
