簡答是: 不是單單靠gyroscopic forces 或是說postitive trail。
藉著了解自行車如何平衡，可能有助於擴大車架本身的設計想法。這個研究發表在Science上，有興趣可以找來看看。
延伸閱讀：
- A Bicycle Can Be Self-Stable Without Gyroscopic or Caster Effects – Science Vol. 332, pp. 339-342 (2011)
- Bicycle Stability – Everything Works Together – 裡面列的video也值得一看
Trail, rake & head angle
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| Bicycle fork design (Wiki) |
Their connection
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| Trail diagram (Wiki) |
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