Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/45-13 | 245/40-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.97 (532.7) | 22.72 (577) | 1.74 (44.3) 8.3% |
| Width inches (mm) | 8.86 (225) | 9.65 (245) | 0.79 (20) 8.9% |
| Circum. inches (mm) | 65.89 (1673.53) | 71.37 (1812.7) | 5.48 (139.17) 8.3% |
| Sidewall Height inches (mm) | 3.99 (101.25) | 3.86 (98) | -0.13 (-3.25) -3.2% |
| Revolutions per mile (km) | 961.65 (597.54) | 887.82 (551.66) | -73.83 (-45.88) -7.7% |
245/40-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.66 mph (34.86 km/h) |
| 25 mph (40.23 km/h) | 27.08 mph (43.58 km/h) |
| 30 mph (48.28 km/h) | 32.49 mph (52.3 km/h) |
| 35 mph (56.33 km/h) | 37.91 mph (61.01 km/h) |
| 40 mph (64.37 km/h) | 43.33 mph (69.73 km/h) |
| 45 mph (72.42 km/h) | 48.74 mph (78.44 km/h) |
| 50 mph (80.47 km/h) | 54.16 mph (87.16 km/h) |
| 55 mph (88.51 km/h) | 59.57 mph (95.88 km/h) |
| 60 mph (96.56 km/h) | 64.99 mph (104.59 km/h) |
| 65 mph (104.61 km/h) | 70.41 mph (113.31 km/h) |
| 70 mph (112.65 km/h) | 75.82 mph (122.02 km/h) |
| 75 mph (120.7 km/h) | 81.24 mph (130.74 km/h) |
| 80 mph (128.75 km/h) | 86.65 mph (139.45 km/h) |
| 85 mph (136.79 km/h) | 92.07 mph (148.17 km/h) |
| 90 mph (144.84 km/h) | 97.48 mph (156.89 km/h) |
| 95 mph (152.89 km/h) | 102.9 mph (165.6 km/h) |
| 100 mph (160.93 km/h) | 108.32 mph (174.32 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2259 | 2625 | 2827 | 2952 | 3086 | 3182 | 3288 | 3413 | 3586 | 3759 | 3951 | 4105 | 4384 | 4692 | 4932 | 5086 | 5172 | 5490 | 5932 | 6893 |
Better Fuel Economy Factory Ratios Increased Power
