Amazon.com : SHIMANO 105 RD-R7000 105 11-speed rear derailleur, SS, for low gear 25-30T, black : Sports & Outdoors
Amazon.com: JKSPORTS Shimano OEM 105 R7000 Groupset 12-25T/28T 50x34/52-36/53-39T 165/170/172.5/6.890 in (bielas de 6.693 in 50-34t sin parte inferior) : Deportes y Actividades al Aire Libre