後變速器B螺絲的用途是啥啊...? - 單車

※ 引述《chienjr (Rincon LXT)》之銘言：
: 如精華區所述，調整時要調到剛剛好不會與飛輪磨到....
: 可是，shimano的是可以上下彈的，也是這樣調嗎？
: 調太開會有什麼影響啊？
: 變速會變笨嗎XD

太開的話變速會遲緩吧,哪天我自己試試

定義
B-screw: A screw used to adjust the spring tension
on the mounting pivot, which affects the distance between
the cogs and the guide pulley

症狀
If the shift performance is poor in several outer cogs
but good in all the inner cogs, it may indicate that
the B-screw or chain length needs adjustment.

以上摘自Barnet's Manual chap. 32,這裡面提到太多B-screw了,可以自行翻閱


另外不可以透過B-Screw調整鏈條張力,但這是適用Sram的後變,$himano的調整還是要看

它本身的說明

Do not use the b-adjust screw to adjust
the rear derailleur to act as a chaintensioning
device or to prevent chain
suck. This increases the chain gap
causing poor shifting performance.

摘自Sram TECHNICAL MANUAL MTB COMPONENTS

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