I have a set of nissan rims I want to use but would like to push the rear wheels out to fill the guards. 25mm will keep the rim inside the rear guard and will match the front off set. I can buy spacers no problem but I'm confused about the measurements.
5 x 114.3 I understand. Thread pitch 12 x 1.5 and thickness 25mm I dont? What do I need for a 91 model?

Yep - exactly what you have stated.

Brilliant cause I just took the specs off the set I thought id buy. Cheers man

you might want to get the correct center bore for the sw20 too, 60.1mm IIRC. just to take the load off the studs.