Thanks Mate, You seem to be helping me with all my threads haha, Well ive been told to go with ones that bolt to the hub then wheels bolt to the spacer as otherwise the bolts suffer if holding all of it, I dont do any track days or things like that but do go on cruises so i am stuck what to do :/
£150 for front and back B centric 50mm and 20mm seems alot of money haha
Fair enough, my thinking for going for A centric was that they're cheaper, and also I don't think a companies like FK, H&R, Eibach, etc. would sell spacers which were dangerous. They have to meet certain standards, so I'm happy in the knowledge that they're safe.
Before you order anything make sure you actually measure the gap between the inside of the wheel arch and the widest part of the top of your wheel. I did this by getting a bit of string, tie a spanner around the end to act as a weight, then hold the other end of the string on the inside of the wheel arch. You can then use a ruler to measure the distance between the wheel and the string. I've read that you should allow about 3-5mm saftey gap.
For example, the gap on my front wheels was 19mm each side (38mm total), so I order 15mm spacers (30mm total), which leaves 4mm leeway.
I hope this helps. I'm by no means an expert, just sharing the limited knowledge I have from looking into spacers myself recently.