Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/35-20 | 245/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.75 (679.5) | 27.72 (704) | 0.96 (24.5) 3.6% |
| Width inches (mm) | 9.65 (245) | 9.65 (245) | 0 (0) 0% |
| Circum. inches (mm) | 84.04 (2134.71) | 87.07 (2211.68) | 3.03 (76.97) 3.6% |
| Sidewall Height inches (mm) | 3.38 (85.75) | 3.86 (98) | 0.48 (12.25) 14.3% |
| Revolutions per mile (km) | 753.89 (468.45) | 727.66 (452.14) | -26.24 (-16.3) -3.5% |
245/40-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.72 mph (33.35 km/h) |
| 25 mph (40.23 km/h) | 25.9 mph (41.68 km/h) |
| 30 mph (48.28 km/h) | 31.08 mph (50.02 km/h) |
| 35 mph (56.33 km/h) | 36.26 mph (58.36 km/h) |
| 40 mph (64.37 km/h) | 41.44 mph (66.69 km/h) |
| 45 mph (72.42 km/h) | 46.62 mph (75.03 km/h) |
| 50 mph (80.47 km/h) | 51.8 mph (83.37 km/h) |
| 55 mph (88.51 km/h) | 56.98 mph (91.71 km/h) |
| 60 mph (96.56 km/h) | 62.16 mph (100.04 km/h) |
| 65 mph (104.61 km/h) | 67.34 mph (108.38 km/h) |
| 70 mph (112.65 km/h) | 72.52 mph (116.72 km/h) |
| 75 mph (120.7 km/h) | 77.7 mph (125.05 km/h) |
| 80 mph (128.75 km/h) | 82.88 mph (133.39 km/h) |
| 85 mph (136.79 km/h) | 88.06 mph (141.73 km/h) |
| 90 mph (144.84 km/h) | 93.25 mph (150.06 km/h) |
| 95 mph (152.89 km/h) | 98.43 mph (158.4 km/h) |
| 100 mph (160.93 km/h) | 103.61 mph (166.74 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
