trail越大車頭越穩...低速轉向也越頓
輪子半徑用339.48mm(700 X 23C)
| 頭管角 | 前叉 rake(mm) | trail(mm) | |
| 70.0 | 43 | 77.80 | |
| 70.5 | 43 | 74.60 | |
| 71.0 | 43 | 71.41 | |
| 71.5 | 43 | 68.25 | |
| 72.0 | 43 | 65.09 | Dave Moulton建議 63.5mm |
| 72.5 | 43 | 61.95 | |
| 73.0 | 43 | 58.82 | |
| 73.5 | 43 | 55.71 | |
| 74.0 | 43 | 52.61 | |
| 70.0 | 45 | 75.67 | |
| 70.5 | 45 | 72.48 | |
| 71.0 | 45 | 69.30 | |
| 71.5 | 45 | 66.14 | |
| 72.0 | 45 | 62.99 | |
| 72.5 | 45 | 59.85 | |
| 73.0 | 45 | 56.73 | |
| 73.5 | 45 | 53.63 | |
| 74.0 | 45 | 50.53 |
