下坡時的車身晃動問題 - 單車
By Tracy
at 2020-09-23T21:23
at 2020-09-23T21:23
Table of Contents
各位單車版的前輩,小弟於下坡時遇到了很大的問題,本人175cm約65kg,也有討論過是
不是體重太輕造成,但照理來說很多女車友應該體重比我還輕?
在下一些比較陡的陡坡時如台74線139往花壇方向或往台中方向,藍色公路,向上路往市
區方向,大約時速30幾到40(因知道有這種情形所以下坡都盡量控制在很低速)就會開始
出現車子忽然左右抖動 ,很難形容但感覺像是龍頭會左右甩。晃動的頻率會逐漸的加大
,到了幾乎快摔車的程度,要趕快減速,在後面看的車友描述像是癲癇羊癲瘋發作,其他
車友一樣的路線與天氣溜到時速50km也沒問題
奇怪的是像鳳山寺這種緩坡,下坡時速到達50公里,皆沒有這種情況發生,平路40巡航也
完全沒有不安定感
第一部自行車為Kuota的Korsa 配原廠的Vision鋁框完全沒問題,後來換上Mavic ksyrium
sl premium這組鋁框開始有了這種情形發生,發生時也有至車店保養與檢查此輪組都沒
問題
因緣際會下換了一部全新Cervelo R3 C夾版本沿用Mavic的鋁框情況依舊,後又再購買mav
ic cosmic carbone 40 c這組open框版輪搭配GP5000 25C 胎壓100psi,也還是有這樣的
情況發生
發生當下真的滿恐怖的,幾乎快摔車,也不知是車的問題還是我本人的問題,也已經有參
考下坡教學將重心往後調整,但情況依舊
希望各位前輩能給小弟一些不管是車的設定或是我人本身需改進的建議。謝謝大家耐心看
完
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Tags:
單車
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