はじめに
Has the guide pulley in your bike's derailleur been dislodged, broken, or lost? Here's a guide on how to replace it.
必要な工具と部品
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Set your bike upside down by letting it stand on its handlebars and seat.
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もう少しです!
To remove your pulley, see Step 2.
終わりに
To remove your pulley, see Step 2.