[McLaren720s]

I’m planning on running 15mm spacers all around after the car is dropped 20mm on AST HAS. Stock black wheels with P Zero tires.

Are 15mm spacers in the front going to rub at all with this configuration or should I go for 12mm fronts?

[yeetyeet]

I purchased 12 front and 15 rear. I think from what I read is 12front is just at the cusp of rub or so with pzeros, my local shop will be doing fender modification for me anyways just to be safe.

Just offering the choice I made & what I believe may work. Its funny that theres so many different routes people go with spacers.

Also, will be lowering the front with the eibach springs I purchased, and I know that can add factors to rubbing.

[Berzerker]

12mm will rub even without lowering, no matter what people tell you.

10mm won't, or you can get a liner mod or cut the fins yourself to alleviate the rubbing.

[m4ml]

No new information to add that hasn't already been said. I can give my personal experience:

KW HAS and now KW v4
12mm front

Absolutely rubs at full or near full lock in reverse.

[McLaren720s]

I’ve ordered the 12mm and will get the installer to trim the liner

[christianb5s4]

10mm is the max on Pirellis to ensure no rubbing, even at stock height.

[BIGW0RM]

^^^ What he said.

I run 12/15 with pzeros. I had to shave my fins down 50% to not rub. I didnt cut mine out. I just shaved the fin down 50% with an exacto knife.

[Limegrntaln]

Originally Posted by christianb5s4

10mm is the max on Pirellis to ensure no rubbing, even at stock height.

I have MPHAS, and 10mm with Pirellis, and they still rub in reverse, well before lock. They also rubbed about the same before the car was lowered. The RWD is a little different from xDrive. The xDrive has a 14.7:1 steering rack, while the RWD has a 15:1 rack.

So, the rack in the xDrive is a little quicker, which means the wheels turn at a slightly different angle.

[BIGW0RM]

Originally Posted by Limegrntaln

I have MPHAS, and 10mm with Pirellis, and they still rub in reverse, well before lock. They also rubbed about the same before the car was lowered. The RWD is a little different from xDrive. The xDrive has a 14.7:1 steering rack, while the RWD has a 15:1 rack.

So, the rack in the xDrive is a little quicker, which means the wheels turn at a slightly different angle.

Interesting!

[christianb5s4]

Originally Posted by Limegrntaln

I have MPHAS, and 10mm with Pirellis, and they still rub in reverse, well before lock. They also rubbed about the same before the car was lowered. The RWD is a little different from xDrive. The xDrive has a 14.7:1 steering rack, while the RWD has a 15:1 rack.

So, the rack in the xDrive is a little quicker, which means the wheels turn at a slightly different angle.

Interesting, learn something new every day! Thanks for sharing and good to know as I plan to do MPHAS as well.