luminova

Once I have done the head gasket on my '94 945 and a couple of tidying jobs (mainly a new o/s rear door which was damaged by some old biddy in a punto). The only thing needed for the MOT will be a new set of tyres. Given the low prices that you can get tyre and wheel packages now I thought I might treat the old girl to some new shiny shoes as I need new tyres and trims all round anyway and the price wouldn't be much more if any. Can anyone give me the specs for offset,stud spacing etc.I can only seem to find the ones for post '95 960's on the web. I was considering upsizing to a 16" wheel, if I did I believe a 205/55/16 would give me the same overall wheel diameter so not upsetting speedo readings, is this right? Would the extra 20mm width cause any problems though, it looks like there is plenty of room but I don't know about on full lock.
A lot of questions I know but your help is greatly appreciated.

Many Thanks.

Bryan