REAR DERAILLEUR, RD-4700, TIAGRA, SS 10-SPEED DIRECT ATTACHMENT, COMPATIBLE WITH LOW GEAR 23-28T

Description

* Min cog: 11T* Max cog: SS: 28T GS: 34T* Total capacity: SS:33T GS:39T* Max front difference: SS:16T* Compatible only with Tiagra 4700 or GRX RX400 shifters