[請益] 為什麼現在的腳踏車多要彎腰?
現在路上一般的腳踏車(小摺、小孩用的除外),
幾乎都做成腰要往前傾的,早期的車(往兩邊彎的牛角手把、往上高起的羚角手把)
則是人坐直直的就行了,
為啥會有這樣的改變呢?腰往前傾不會更容易腰痠嗎?
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