I just installed style 231 rims on my e60 with
275/35/19 rear & 245/40/19front et24 all wheels what is the best tyre pressure for them ?

 

A lot depends on personal preference ride vs. economy. Rolling resistance (and tire wear) is decreased with higher tire pressure, but results in a rougher ride. Follow the guidelines on the wall of the tire and those stamped on the pillar post of your car.