LANCER wrote on 05/19/09 at 12:57:12:The GS series covers 15", 16" & 17", depending on the model and year...oh and also varies between spoke and mag style.
I doubt there were 15" rears on any GS models. 16", 17" and 18".
There are some 120/90-17 and 130/70-17 semi knobbies that would fit with stock swing arm and fender.