[問題] 輪軩莫名的會消風
各位大大好，
小弟想請教一下，輪胎莫名其妙放個一兩週就會胎壓掉到20psi不到，
有可能是怎麼回事??
小弟的情況是，之前跟人換框含胎，二手的，拿去輪胎店檢查都說沒問題，
結果回家放著，可能兩週沒動，有一顆胎就會剩15、17psi，
後來也有再把胎整顆拆下來放到大桶水裡，也查不到哪裡漏氣，
我問那該怎辦，保養廠建議換一組新胎，我後來也真的換了，
結果最近發現胎壓又跑掉了，昨天只量到15psi，囧。
想問一下這該怎麼處理??怎麼找出原因呢??
感謝~~
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