Shimano REAR DERAILLEUR, RD-5701-L, 105, GS 10-SPEED DIRECT ATTACHMENT, COMPATIBLE WITH LOW GEAR 27-32T FOR DOUBLE, 25-30T FOR TRIPLE, BLACK - Velo IBIKE
Amazon.com : SHIMANO RD 5701 105 30T Max Rear Derailleur, Black, Medium Cage : Rear Bike Derailleurs : Sports & Outdoors