Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/35-20 | 245/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.03 (686.5) | 27.72 (704) | 0.69 (17.5) 2.5% |
| Width inches (mm) | 10.04 (255) | 9.65 (245) | -0.39 (-10) -3.9% |
| Circum. inches (mm) | 84.91 (2156.7) | 87.07 (2211.68) | 2.16 (54.98) 2.5% |
| Sidewall Height inches (mm) | 3.51 (89.25) | 3.86 (98) | 0.34 (8.75) 9.8% |
| Revolutions per mile (km) | 746.21 (463.67) | 727.66 (452.14) | -18.55 (-11.53) -2.5% |
245/40-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.51 mph (33.01 km/h) |
| 25 mph (40.23 km/h) | 25.64 mph (41.26 km/h) |
| 30 mph (48.28 km/h) | 30.76 mph (49.51 km/h) |
| 35 mph (56.33 km/h) | 35.89 mph (57.76 km/h) |
| 40 mph (64.37 km/h) | 41.02 mph (66.01 km/h) |
| 45 mph (72.42 km/h) | 46.15 mph (74.27 km/h) |
| 50 mph (80.47 km/h) | 51.27 mph (82.52 km/h) |
| 55 mph (88.51 km/h) | 56.4 mph (90.77 km/h) |
| 60 mph (96.56 km/h) | 61.53 mph (99.02 km/h) |
| 65 mph (104.61 km/h) | 66.66 mph (107.27 km/h) |
| 70 mph (112.65 km/h) | 71.78 mph (115.53 km/h) |
| 75 mph (120.7 km/h) | 76.91 mph (123.78 km/h) |
| 80 mph (128.75 km/h) | 82.04 mph (132.03 km/h) |
| 85 mph (136.79 km/h) | 87.17 mph (140.28 km/h) |
| 90 mph (144.84 km/h) | 92.29 mph (148.53 km/h) |
| 95 mph (152.89 km/h) | 97.42 mph (156.79 km/h) |
| 100 mph (160.93 km/h) | 102.55 mph (165.04 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
