Product Detail 產品詳情 - Bicycle Cluster

Transmission Derailleur Chain Guide / Chain Catcher

CH-CM4

Mr. Control (Fouriers)

Chain guard for 1 by 9, 10, 11 speed. With plastic upper guard. Chainline adjustable

https://www.mrcontrol-bike.com/product_d.php?lang=en&tb=1&id=988