Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 115/70-15 | 115/65-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.34 (542) | 22.89 (581.3) | 1.55 (39.3) 7.3% |
| Width inches (mm) | 4.53 (115) | 4.53 (115) | 0 (0) 0% |
| Circum. inches (mm) | 67.04 (1702.74) | 71.9 (1826.21) | 4.86 (123.46) 7.3% |
| Sidewall Height inches (mm) | 3.17 (80.5) | 2.94 (74.75) | -0.23 (-5.75) -7.1% |
| Revolutions per mile (km) | 945.15 (587.29) | 881.25 (547.58) | -63.9 (-39.7) -6.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.45 mph (34.52 km/h) |
| 25 mph (40.23 km/h) | 26.81 mph (43.15 km/h) |
| 30 mph (48.28 km/h) | 32.18 mph (51.78 km/h) |
| 35 mph (56.33 km/h) | 37.54 mph (60.41 km/h) |
| 40 mph (64.37 km/h) | 42.9 mph (69.04 km/h) |
| 45 mph (72.42 km/h) | 48.26 mph (77.67 km/h) |
| 50 mph (80.47 km/h) | 53.63 mph (86.3 km/h) |
| 55 mph (88.51 km/h) | 58.99 mph (94.93 km/h) |
| 60 mph (96.56 km/h) | 64.35 mph (103.56 km/h) |
| 65 mph (104.61 km/h) | 69.71 mph (112.19 km/h) |
| 70 mph (112.65 km/h) | 75.08 mph (120.82 km/h) |
| 75 mph (120.7 km/h) | 80.44 mph (129.45 km/h) |
| 80 mph (128.75 km/h) | 85.8 mph (138.08 km/h) |
| 85 mph (136.79 km/h) | 91.16 mph (146.71 km/h) |
| 90 mph (144.84 km/h) | 96.53 mph (155.34 km/h) |
| 95 mph (152.89 km/h) | 101.89 mph (163.97 km/h) |
| 100 mph (160.93 km/h) | 107.25 mph (172.6 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2243 | 2605 | 2806 | 2930 | 3063 | 3159 | 3264 | 3388 | 3560 | 3731 | 3922 | 4075 | 4352 | 4657 | 4896 | 5048 | 5134 | 5449 | 5888 | 6842 |
Better Fuel Economy Factory Ratios Increased Power
