Shimano Sora 2300 8 speed Mini Groupset (F & R mechs, Shifters) | CycleChat Cycling Forum
Shimano Sora R400 Double/Triple 8-Speed Braze-On Shifters | Tree Fort Bikes
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 ST-3300 RIGHT ONLY 8 Speed Shifter Brake Lever | eBay