Shimano 14-28T 11速飛輪 - 單車
By Zenobia
at 2015-09-23T09:58
at 2015-09-23T09:58
Table of Contents
: → guyverwu : 為了青少年健康發展而設計出這顆飛輪..現在賣個東西 09/23 00:35
: → guyverwu : 還得想(ㄅㄞ)出這麼偉大的理由,真是辛苦的 09/23 00:36
不好意思這位G板友,這篇回文是因您而起的所以在此先向您致意一下。
UCI有規定,青少年選手的自行車齒比不得過大,理由就是因為青少年的身體發育
還不夠完全,為了保護他們的肌肉骨骼之類的所以要限制齒比。
至於怎麼限制呢?
U19,也就是19歲以下的選手不論男女,最重齒比轉一圈不得超過7.93公尺。
U17,也就是17歲以下的選手不論男女,最重齒比轉一圈不得超過6.94公尺。
U15,中略 6.00公尺。
U13,中略 5.60公尺。
量法也很簡單,調到最重齒,倒車牽一段量距離就知道了。
然後順便感慨一下,人家歪果仁的制度一路從小就有規劃讓小朋友可以平安長大,
反觀華人小朋友呢?舉個簡單例子,國球在青少棒我們都是一路電爆人家,可是成
棒呢?
自行車王國我想台灣說第二沒人敢說第一,可是我們除了生產很多自行車之外,其
他呢?
最後再一次感謝這位G板友,您讓大家都學到了新的知識(應該啦)。
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