Sure , is a matter of compatibility also - from my knowleadge nothing modern will fit to Normandy Hubs and 120mm frame space . We where talking about Shimano HG....Sunrace 6 speed but they don't fit? I am wrong? In the end , my options are Regina 5 speed , Atom 5 speed, Atom Compact 6 speed , Suntour 5 speed , Suntour Ultra 6 speed , Shimano UG 5 speed and maybe newer shimano 600, UG, 5 speed. Do i have other options too unless i don't have to change wheels...hubs....cold space frame& other stuff? Thank you!