Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/65-18 | 225/75-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.52 (749.7) | 31.29 (794.7) | 1.77 (45) 6% |
| Width inches (mm) | 8.86 (225) | 8.86 (225) | 0 (0) 0% |
| Circum. inches (mm) | 92.73 (2355.25) | 98.29 (2496.62) | 5.57 (141.37) 6% |
| Sidewall Height inches (mm) | 5.76 (146.25) | 6.64 (168.75) | 0.89 (22.5) 15.4% |
| Revolutions per mile (km) | 683.3 (424.58) | 644.61 (400.54) | -38.69 (-24.04) -5.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.2 mph (34.12 km/h) |
| 25 mph (40.23 km/h) | 26.5 mph (42.65 km/h) |
| 30 mph (48.28 km/h) | 31.8 mph (51.18 km/h) |
| 35 mph (56.33 km/h) | 37.1 mph (59.71 km/h) |
| 40 mph (64.37 km/h) | 42.4 mph (68.24 km/h) |
| 45 mph (72.42 km/h) | 47.7 mph (76.77 km/h) |
| 50 mph (80.47 km/h) | 53 mph (85.3 km/h) |
| 55 mph (88.51 km/h) | 58.3 mph (93.83 km/h) |
| 60 mph (96.56 km/h) | 63.6 mph (102.36 km/h) |
| 65 mph (104.61 km/h) | 68.9 mph (110.89 km/h) |
| 70 mph (112.65 km/h) | 74.2 mph (119.42 km/h) |
| 75 mph (120.7 km/h) | 79.5 mph (127.95 km/h) |
| 80 mph (128.75 km/h) | 84.8 mph (136.48 km/h) |
| 85 mph (136.79 km/h) | 90.1 mph (145.01 km/h) |
| 90 mph (144.84 km/h) | 95.4 mph (153.54 km/h) |
| 95 mph (152.89 km/h) | 100.7 mph (162.06 km/h) |
| 100 mph (160.93 km/h) | 106 mph (170.59 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1640 | 1906 | 2052 | 2143 | 2241 | 2311 | 2387 | 2478 | 2604 | 2729 | 2869 | 2981 | 3183 | 3406 | 3581 | 3693 | 3755 | 3986 | 4307 | 5005 |
Better Fuel Economy Factory Ratios Increased Power
