Hi,
I am installing H&R Springs (-20mm).
I have a 09 P30 (Hard Suspension) with OEM 19". Also running 265 Michelin PSS on the rear.
Which spacers would be best for me? And what lug nuts would I need.
Thanks.
Hard to know what width spacers you will need.
I've have experience with spacers and it's a case of guess what spacers you will need as accurately as you can and then go from there.
It may be that you find you will need slightly wider spacers, or slightly thinner.
Tyres can influence which width spacers you need because the shoulders can vary by quite a lot from one tyre to the next.
Either way, you need to make sure the spacers are hubcentric so that they sit snuggly on your rear hubs.
Regarding bolts, you'll need to get bolts that factor in the additional length they will need to travel before screwing into the hub.
Generally speaking, if you get 10mm spacers, you'll need to get bolts that are 10mm longer.
Ideally, each bolt should complete around 7 complete turns before tightening into the hub.
Also make sure you get bolts with the correct necks (ie, radius or coned).