Z4M-Tire pressures-PS2's

[Bones ZHP]

What are the recommended pressures for PS2's on the Z4 M Coupe? (stock sizes)

[brave1heart]

Street? Track? Autocross? Stock setup? General rule for street driving is 1 psi per 100 lb of weight. 33f/33r works well. I have not had mine at the autoX and track yet but had two sets of PS2s on my 325i with many track and autoX days. On a sunny warm day, I'd start the autoX with 36f/32r and take it from there. For track driving, I'd start with 32f/33r and see where the hot pressure ends up when I get off the track. I'd expect the PS2 to pick up ~ 8 lbs in the front because of the understeer and ~ 6 lbs in the rear.

[Bones ZHP]

Clarification-- they'll be used for the street. Stock set up.

[brave1heart]

Clarification-- they'll be used for the street. Stock set up.

I like 32f/32r. Good ride quality and sufficient protection against bumps and pot holes.

[Dammmittt]

Are they the same weight rating as stock contis?

[Bones ZHP]

Not sure. They are marked "XL" (extra load).

[Palantirion@BMS]

I like 32f/32r. Good ride quality and sufficient protection against bumps and pot holes.
+1. I've run between 30 and 33psi on my Contis as well as the RA-1 and NT-01. The latter seemed to do best at 31psi, PS2s will be fine in the same range.

[pal]

The PS2 are super soft tires and I ruined multiple wheels in the past with them so I would recommend running "at least" 32 psi if not a couple more.

[Bones ZHP]

Thanks, all.

[danlauz]

I run PS2 mostly city and, I use 30 front and 31 REAR

32-33 is too stiff for me