Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 115/70-14 | 245/40-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 20.34 (516.6) | 22.72 (577) | 2.38 (60.4) 11.7% |
| Width inches (mm) | 4.53 (115) | 9.65 (245) | 5.12 (130) 113% |
| Circum. inches (mm) | 63.9 (1622.95) | 71.37 (1812.7) | 7.47 (189.75) 11.7% |
| Sidewall Height inches (mm) | 3.17 (80.5) | 3.86 (98) | 0.69 (17.5) 21.7% |
| Revolutions per mile (km) | 991.62 (616.16) | 887.82 (551.66) | -103.8 (-64.5) -10.5% |
245/40-15 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.34 mph (35.95 km/h) |
| 25 mph (40.23 km/h) | 27.92 mph (44.94 km/h) |
| 30 mph (48.28 km/h) | 33.51 mph (53.93 km/h) |
| 35 mph (56.33 km/h) | 39.09 mph (62.91 km/h) |
| 40 mph (64.37 km/h) | 44.68 mph (71.9 km/h) |
| 45 mph (72.42 km/h) | 50.26 mph (80.89 km/h) |
| 50 mph (80.47 km/h) | 55.85 mph (89.88 km/h) |
| 55 mph (88.51 km/h) | 61.43 mph (98.86 km/h) |
| 60 mph (96.56 km/h) | 67.02 mph (107.85 km/h) |
| 65 mph (104.61 km/h) | 72.6 mph (116.84 km/h) |
| 70 mph (112.65 km/h) | 78.18 mph (125.83 km/h) |
| 75 mph (120.7 km/h) | 83.77 mph (134.81 km/h) |
| 80 mph (128.75 km/h) | 89.35 mph (143.8 km/h) |
| 85 mph (136.79 km/h) | 94.94 mph (152.79 km/h) |
| 90 mph (144.84 km/h) | 100.52 mph (161.78 km/h) |
| 95 mph (152.89 km/h) | 106.11 mph (170.76 km/h) |
| 100 mph (160.93 km/h) | 111.69 mph (179.75 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
