I have bluebird trx rims on my rona, need spacers to bring them out a bit, my uncle has a set of 15x8 that he was gonna put on the rona as well but he sold it too me, they needed spacers as well and also to roll the guards a bit not much.
There is plenty of room out back for decent tyres, on a 7inch wide rim something like a 215/55/15 would be pretty close to standard rolling diameter.