【Hot Topic !】 What’s CAPACITY BOOSTER !?

Just swapping the original pulleys to CAPACITY BOOSTER increases rear derailleur capacity and takes up the chain slack when CY4-SHC 32T / 33T is used. CAPACITY BOOSTER is effective not only with CY4-SHC but also with circular chainrings!
・Product
CAPACITY BOOSTER 12S DA
CAPACITY BOOSTER 12S UL/105
CAPACITY BOOSTER 11S
CY4-SHC 12S
CY4-SHC 12S-RS520
CY4-SHC (11-SPEED)
CY4-SHC (FC-RS510)
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