Vehicle Component settings not fully exposed in blueprints

So, why can’t i access Vehicle Component variables via blueprints, like for instance gear shift time, max RPM or tires. I would like to change tire settings(friction for instance) on the fly but i can’t. any idea why?

In the component list of your blueprint, try to drag n drop vehicle movement in the event graph, and the you drag a wire from the vehicule movement pin and then you can change things

I tried that, settings like RPM, Or tire friction nothing is available.