As spec, meaning what shows in the door sills. I just have excellent tires, slow it down, brake ahead of usual, and shift gears earlier when it snows alot. When it spins alot on start, starting in second is even better, and ease up on the throttle to lessen the spin and to regain better grip. Otherwise the snow melts under the tire and the spinning only gets worse, or goes on longer than necessary.
Getting out of a parking snowed mess requires going forward and backwards subsequently and keeping the car going making it rock forwards and back, then sensibly step on it until cleared. The technique is to make a path that will let you gain enough momentum to get out.
I have a lot of fun with these situations !