Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/25-20 | 245/40-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.41 (645.5) | 27.72 (704) | 2.3 (58.5) 9.1% |
| Width inches (mm) | 10.83 (275) | 9.65 (245) | -1.18 (-30) -10.9% |
| Circum. inches (mm) | 79.84 (2027.9) | 87.07 (2211.68) | 7.24 (183.78) 9.1% |
| Sidewall Height inches (mm) | 2.71 (68.75) | 3.86 (98) | 1.15 (29.25) 42.5% |
| Revolutions per mile (km) | 793.6 (493.12) | 727.66 (452.14) | -65.95 (-40.98) -8.3% |
245/40-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.81 mph (35.1 km/h) |
| 25 mph (40.23 km/h) | 27.27 mph (43.88 km/h) |
| 30 mph (48.28 km/h) | 32.72 mph (52.66 km/h) |
| 35 mph (56.33 km/h) | 38.17 mph (61.43 km/h) |
| 40 mph (64.37 km/h) | 43.63 mph (70.21 km/h) |
| 45 mph (72.42 km/h) | 49.08 mph (78.98 km/h) |
| 50 mph (80.47 km/h) | 54.53 mph (87.76 km/h) |
| 55 mph (88.51 km/h) | 59.98 mph (96.54 km/h) |
| 60 mph (96.56 km/h) | 65.44 mph (105.31 km/h) |
| 65 mph (104.61 km/h) | 70.89 mph (114.09 km/h) |
| 70 mph (112.65 km/h) | 76.34 mph (122.86 km/h) |
| 75 mph (120.7 km/h) | 81.8 mph (131.64 km/h) |
| 80 mph (128.75 km/h) | 87.25 mph (140.42 km/h) |
| 85 mph (136.79 km/h) | 92.7 mph (149.19 km/h) |
| 90 mph (144.84 km/h) | 98.16 mph (157.97 km/h) |
| 95 mph (152.89 km/h) | 103.61 mph (166.74 km/h) |
| 100 mph (160.93 km/h) | 109.06 mph (175.52 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
