Thanks not sure if I'm right it depends on what rim ya got. I'm using a steel rear and this is what I came up with after cutting down spaces this avo. I put up my measurements to help give a guide to others. Back rim is a few mill ****eyed to get the rim centred. I carny space my brake calliper out as the tab on the swing arm to hold the calliper from spinning isn't long enough. I would be interested in knowing what size spaces you are using and what type of rim and hub width you have though