Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/40-20 | 245/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.35 (720) | 27.72 (704) | -0.63 (-16) -2.2% |
| Width inches (mm) | 10.43 (265) | 9.65 (245) | -0.79 (-20) -7.5% |
| Circum. inches (mm) | 89.05 (2261.95) | 87.07 (2211.68) | -1.98 (-50.27) -2.2% |
| Sidewall Height inches (mm) | 4.17 (106) | 3.86 (98) | -0.31 (-8) -7.5% |
| Revolutions per mile (km) | 711.49 (442.1) | 727.66 (452.14) | 16.17 (10.05) 2.3% |
245/40-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.56 mph (31.47 km/h) |
| 25 mph (40.23 km/h) | 24.44 mph (39.34 km/h) |
| 30 mph (48.28 km/h) | 29.33 mph (47.21 km/h) |
| 35 mph (56.33 km/h) | 34.22 mph (55.08 km/h) |
| 40 mph (64.37 km/h) | 39.11 mph (62.94 km/h) |
| 45 mph (72.42 km/h) | 44 mph (70.81 km/h) |
| 50 mph (80.47 km/h) | 48.89 mph (78.68 km/h) |
| 55 mph (88.51 km/h) | 53.78 mph (86.55 km/h) |
| 60 mph (96.56 km/h) | 58.67 mph (94.42 km/h) |
| 65 mph (104.61 km/h) | 63.56 mph (102.28 km/h) |
| 70 mph (112.65 km/h) | 68.44 mph (110.15 km/h) |
| 75 mph (120.7 km/h) | 73.33 mph (118.02 km/h) |
| 80 mph (128.75 km/h) | 78.22 mph (125.89 km/h) |
| 85 mph (136.79 km/h) | 83.11 mph (133.75 km/h) |
| 90 mph (144.84 km/h) | 88 mph (141.62 km/h) |
| 95 mph (152.89 km/h) | 92.89 mph (149.49 km/h) |
| 100 mph (160.93 km/h) | 97.78 mph (157.36 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1852 | 2151 | 2317 | 2419 | 2529 | 2608 | 2695 | 2797 | 2939 | 3081 | 3239 | 3365 | 3593 | 3845 | 4042 | 4168 | 4239 | 4499 | 4862 | 5650 |
Better Fuel Economy Factory Ratios Increased Power
