Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/40-19 | 245/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.72 (678.6) | 27.72 (704) | 1 (25.4) 3.7% |
| Width inches (mm) | 9.65 (245) | 9.65 (245) | 0 (0) 0% |
| Circum. inches (mm) | 83.93 (2131.88) | 87.07 (2211.68) | 3.14 (79.8) 3.7% |
| Sidewall Height inches (mm) | 3.86 (98) | 3.86 (98) | 0 (0) 0% |
| Revolutions per mile (km) | 754.89 (469.07) | 727.66 (452.14) | -27.24 (-16.92) -3.6% |
245/40-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.75 mph (33.39 km/h) |
| 25 mph (40.23 km/h) | 25.94 mph (41.74 km/h) |
| 30 mph (48.28 km/h) | 31.12 mph (50.09 km/h) |
| 35 mph (56.33 km/h) | 36.31 mph (58.44 km/h) |
| 40 mph (64.37 km/h) | 41.5 mph (66.78 km/h) |
| 45 mph (72.42 km/h) | 46.68 mph (75.13 km/h) |
| 50 mph (80.47 km/h) | 51.87 mph (83.48 km/h) |
| 55 mph (88.51 km/h) | 57.06 mph (91.83 km/h) |
| 60 mph (96.56 km/h) | 62.25 mph (100.18 km/h) |
| 65 mph (104.61 km/h) | 67.43 mph (108.52 km/h) |
| 70 mph (112.65 km/h) | 72.62 mph (116.87 km/h) |
| 75 mph (120.7 km/h) | 77.81 mph (125.22 km/h) |
| 80 mph (128.75 km/h) | 82.99 mph (133.57 km/h) |
| 85 mph (136.79 km/h) | 88.18 mph (141.91 km/h) |
| 90 mph (144.84 km/h) | 93.37 mph (150.26 km/h) |
| 95 mph (152.89 km/h) | 98.56 mph (158.61 km/h) |
| 100 mph (160.93 km/h) | 103.74 mph (166.96 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
