Amazon.com : SHIMANO Sora 3500 Road Bike Rear Mech Derailleur 9 Speed : Sports & Outdoors
Is this Sora rear derailleur (rd r3000 gs) actually compatible with 8 speed cassette or is it seller mistake? Can't find any other information online. : r/bikewrench
Shimano Sora HG50 8 Speed Cassette - £10! | Cassettes