SUPER B ( 5-11, 10-17T )-TB-FW40

Super B1017511
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Super B patanted to secure the cassette by one hand easily and quickly.
Adjustable opening so it is suitable for sprockets with cogs from 10~17 teeth, compatible for 5~11 speed.
Fixed with a spring to lock the sprocket fast and firm without slipping away.
Prevent the sprocket deformed and protect your hands from injuries while using.