I recommend you google what qualifies a tire to be rated (1) All season(2) 3peaks (3) Mud/Snow (4) Winter. There might also be an ‘All weather’ rating too. Except for the Winter tire rating the tire has to pass a standard test for acceleration in snow. There is no test to prove the tire can stop...
It will only close and lock if it can sense that the key is both not in the vehicle and not too far away from the vehicle. I found there is a sweet spot you have to have the key for the lock button on the tailgate to actually work.