Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/35-20 | 245/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.2 (665.5) | 27.72 (704) | 1.52 (38.5) 5.8% |
| Width inches (mm) | 8.86 (225) | 9.65 (245) | 0.79 (20) 8.9% |
| Circum. inches (mm) | 82.31 (2090.73) | 87.07 (2211.68) | 4.76 (120.95) 5.8% |
| Sidewall Height inches (mm) | 3.1 (78.75) | 3.86 (98) | 0.76 (19.25) 24.4% |
| Revolutions per mile (km) | 769.75 (478.3) | 727.66 (452.14) | -42.1 (-26.16) -5.5% |
245/40-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.16 mph (34.05 km/h) |
| 25 mph (40.23 km/h) | 26.45 mph (42.56 km/h) |
| 30 mph (48.28 km/h) | 31.74 mph (51.07 km/h) |
| 35 mph (56.33 km/h) | 37.02 mph (59.59 km/h) |
| 40 mph (64.37 km/h) | 42.31 mph (68.1 km/h) |
| 45 mph (72.42 km/h) | 47.6 mph (76.61 km/h) |
| 50 mph (80.47 km/h) | 52.89 mph (85.12 km/h) |
| 55 mph (88.51 km/h) | 58.18 mph (93.63 km/h) |
| 60 mph (96.56 km/h) | 63.47 mph (102.15 km/h) |
| 65 mph (104.61 km/h) | 68.76 mph (110.66 km/h) |
| 70 mph (112.65 km/h) | 74.05 mph (119.17 km/h) |
| 75 mph (120.7 km/h) | 79.34 mph (127.68 km/h) |
| 80 mph (128.75 km/h) | 84.63 mph (136.2 km/h) |
| 85 mph (136.79 km/h) | 89.92 mph (144.71 km/h) |
| 90 mph (144.84 km/h) | 95.21 mph (153.22 km/h) |
| 95 mph (152.89 km/h) | 100.5 mph (161.73 km/h) |
| 100 mph (160.93 km/h) | 105.79 mph (170.24 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
