Tyre pressures

[blunderthumbs]

I'm running 18" Wheels front and rear Z4 E85 3.0L. The tyres on the front are 225-40-R18 and the sticker on the door pillar recommends 2.3 bar for that size.
However the tyres on the rear are 255-35-R18 which is not listed on the door pillar.
What pressures should I be putting in the rears ? :?

 

[Old-Duckman]

I’ve got the same car, my tag reads: front 33 PSI = 2.3 BAR, rear 36 PSI = 2.5 BAR.

 

[blunderthumbs]

Sorted now thanks