Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 250/40-18 | 260/20-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.87 (657.2) | 22.09 (561.2) | -3.78 (-96) -14.6% |
| Width inches (mm) | 9.84 (250) | 10.24 (260) | 0.39 (10) 4% |
| Circum. inches (mm) | 81.29 (2064.65) | 69.41 (1763.06) | -11.87 (-301.59) -14.6% |
| Sidewall Height inches (mm) | 3.94 (100) | 2.05 (52) | -1.89 (-48) -48% |
| Revolutions per mile (km) | 779.47 (484.34) | 912.81 (567.19) | 133.34 (82.85) 17.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.08 mph (27.49 km/h) |
| 25 mph (40.23 km/h) | 21.35 mph (34.36 km/h) |
| 30 mph (48.28 km/h) | 25.62 mph (41.23 km/h) |
| 35 mph (56.33 km/h) | 29.89 mph (48.1 km/h) |
| 40 mph (64.37 km/h) | 34.16 mph (54.97 km/h) |
| 45 mph (72.42 km/h) | 38.43 mph (61.84 km/h) |
| 50 mph (80.47 km/h) | 42.7 mph (68.71 km/h) |
| 55 mph (88.51 km/h) | 46.97 mph (75.58 km/h) |
| 60 mph (96.56 km/h) | 51.24 mph (82.46 km/h) |
| 65 mph (104.61 km/h) | 55.51 mph (89.33 km/h) |
| 70 mph (112.65 km/h) | 59.77 mph (96.2 km/h) |
| 75 mph (120.7 km/h) | 64.04 mph (103.07 km/h) |
| 80 mph (128.75 km/h) | 68.31 mph (109.94 km/h) |
| 85 mph (136.79 km/h) | 72.58 mph (116.81 km/h) |
| 90 mph (144.84 km/h) | 76.85 mph (123.68 km/h) |
| 95 mph (152.89 km/h) | 81.12 mph (130.55 km/h) |
| 100 mph (160.93 km/h) | 85.39 mph (137.43 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2323 | 2699 | 2906 | 3035 | 3173 | 3272 | 3381 | 3509 | 3687 | 3865 | 4063 | 4221 | 4507 | 4824 | 5071 | 5229 | 5318 | 5644 | 6099 | 7087 |
Better Fuel Economy Factory Ratios Increased Power
