u/JPalm05

Just put on my new 19inch vmr v804s. Was driving and the car was shaking a bit then psi light came on, front left was at 23. Filled it up and was checking the others all seemed well, but my back right tire is a different brand tire (almost exact same fitment and wear) and was at almost 50 psi. I let some air out got it to around 40 which all the others are at. I texted who I bought the wheels off and he said he kept them at 45 ish on each wheel. Is that not too much air? I was told 38-40 for 19s on these cars.
Sorry for rambling any help appreciated.