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
Alfine 8spd internal hub - Pvdwiki
Ltwoo A2 Rear Derailleur 7 Speed Mountain Bicycle Componentst Tech 2:1 Compatible With Shimano 3x7 21 Gear Group - AliExpress