大盤變速的技巧 - 單車
By Steve
at 2016-12-26T18:58
at 2016-12-26T18:58
Table of Contents
新手目前的單車變速為 50/34 CT 盤和 11-28 飛輪,105變速器:
50/34 11-12-13-14-15-17-19-21-23-25-28T
小弟的疑惑在大盤的變速時,飛輪變速的檔位和時機點
假設目前飛輪停在 19T,大盤 50T (齒比 2.63)
* 50T --- 19T --- 2.63
前面看到一個長坡,這時要開始大盤轉小。19T 配 34T 齒比會瞬間
掉到 1.8,然後飛輪降兩檔變成 15T,齒比變成 2.26,如果是按三
下變 14T,齒比變成 2.42
* 34T --- 19T ---- 1.8 (先大盤
* 34T --- 15T ---- 2.26 (等大盤變好後再輪到飛輪,點兩下)
* 34T --- 14T ---- 2.42 (降三下的話齒比的變化不會太劇烈)
上面是我現在的做法,輪流變的話齒比在瞬間有很大的變化,腳踏自然很不順。
請問該怎麼變速才是最順暢的,而且沒有風險 (例如沒有落鏈的風險)
選項:
1. 左手點兩下,右手同時點兩下。大盤和飛輪同時換檔
2. 先大盤變速完後再換飛輪變速
3. 先飛輪完再大盤
4. 其他更進階的技巧?
5. 隨性
同樣的,大盤 34T 變到 50T,飛輪變數的時機點也跟上面一樣嗎?
還有好奇變速器的等級是否會影響變速的方式?(例如105的技巧和 dura-ace不同)
另外,有前輩已經開始使用 shimano 最新的序列變速了嗎?它在大盤
和飛輪同時變速時,時機點是如何?個人對這門技術很有興趣,因為大
盤的變速一直很困擾我…
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單車
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