Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 210/40-18 | 240/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.61 (625.2) | 30.28 (769.2) | 5.67 (144) 23% |
| Width inches (mm) | 8.27 (210) | 9.45 (240) | 1.18 (30) 14.3% |
| Circum. inches (mm) | 77.33 (1964.12) | 95.14 (2416.51) | 17.81 (452.39) 23% |
| Sidewall Height inches (mm) | 3.31 (84) | 6.14 (156) | 2.83 (72) 85.7% |
| Revolutions per mile (km) | 819.37 (509.13) | 665.98 (413.82) | -153.39 (-95.31) -18.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.61 mph (39.6 km/h) |
| 25 mph (40.23 km/h) | 30.76 mph (49.5 km/h) |
| 30 mph (48.28 km/h) | 36.91 mph (59.4 km/h) |
| 35 mph (56.33 km/h) | 43.06 mph (69.3 km/h) |
| 40 mph (64.37 km/h) | 49.21 mph (79.2 km/h) |
| 45 mph (72.42 km/h) | 55.36 mph (89.1 km/h) |
| 50 mph (80.47 km/h) | 61.52 mph (99 km/h) |
| 55 mph (88.51 km/h) | 67.67 mph (108.9 km/h) |
| 60 mph (96.56 km/h) | 73.82 mph (118.8 km/h) |
| 65 mph (104.61 km/h) | 79.97 mph (128.7 km/h) |
| 70 mph (112.65 km/h) | 86.12 mph (138.6 km/h) |
| 75 mph (120.7 km/h) | 92.27 mph (148.5 km/h) |
| 80 mph (128.75 km/h) | 98.43 mph (158.4 km/h) |
| 85 mph (136.79 km/h) | 104.58 mph (168.3 km/h) |
| 90 mph (144.84 km/h) | 110.73 mph (178.2 km/h) |
| 95 mph (152.89 km/h) | 116.88 mph (188.1 km/h) |
| 100 mph (160.93 km/h) | 123.03 mph (198 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1695 | 1969 | 2120 | 2214 | 2315 | 2387 | 2466 | 2560 | 2690 | 2820 | 2964 | 3079 | 3289 | 3519 | 3700 | 3815 | 3880 | 4118 | 4450 | 5171 |
Better Fuel Economy Factory Ratios Increased Power
