Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/45-15 | 245/40-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.68 (601.5) | 22.72 (577) | -0.96 (-24.5) -4.1% |
| Width inches (mm) | 9.65 (245) | 9.65 (245) | 0 (0) 0% |
| Circum. inches (mm) | 74.4 (1889.67) | 71.37 (1812.7) | -3.03 (-76.97) -4.1% |
| Sidewall Height inches (mm) | 4.34 (110.25) | 3.86 (98) | -0.48 (-12.25) -11.1% |
| Revolutions per mile (km) | 851.65 (529.19) | 887.82 (551.66) | 36.16 (22.47) 4.2% |
245/40-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.19 mph (30.88 km/h) |
| 25 mph (40.23 km/h) | 23.98 mph (38.59 km/h) |
| 30 mph (48.28 km/h) | 28.78 mph (46.31 km/h) |
| 35 mph (56.33 km/h) | 33.57 mph (54.03 km/h) |
| 40 mph (64.37 km/h) | 38.37 mph (61.75 km/h) |
| 45 mph (72.42 km/h) | 43.17 mph (69.47 km/h) |
| 50 mph (80.47 km/h) | 47.96 mph (77.19 km/h) |
| 55 mph (88.51 km/h) | 52.76 mph (84.91 km/h) |
| 60 mph (96.56 km/h) | 57.56 mph (92.63 km/h) |
| 65 mph (104.61 km/h) | 62.35 mph (100.35 km/h) |
| 70 mph (112.65 km/h) | 67.15 mph (108.07 km/h) |
| 75 mph (120.7 km/h) | 71.95 mph (115.78 km/h) |
| 80 mph (128.75 km/h) | 76.74 mph (123.5 km/h) |
| 85 mph (136.79 km/h) | 81.54 mph (131.22 km/h) |
| 90 mph (144.84 km/h) | 86.33 mph (138.94 km/h) |
| 95 mph (152.89 km/h) | 91.13 mph (146.66 km/h) |
| 100 mph (160.93 km/h) | 95.93 mph (154.38 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
