True
Understand that the primary function of tread on a tire is to divert water from beneath the tire to improve traction and avoid hydroplaning on wet roads.
...Vehicle is suspended in mid-air.
You will lose traction especially on wet roads.
Cars might skid on wet roads because the water gets under the tires of the car. Then the cars don't have enough traction.
A vehicle loses traction on wet roads especially if the tires are worn.
They won't provide more traction when the roads are wet, it would be like driving on ice.
Yes, It is a rating of how well it "stop" in the wet. AA is the highest rating, A, B, C is the lowest.
Tire Ratings - Traction grades Traction grades are an indication of a tire's ability to stop on wet pavement. A higher graded tire should allow a car to stop on wet roads in a shorter distance than a tire with a lower grade. Traction is graded from highest to lowest as "AA", "A", "B", and "C".
Quite a bit especially if your tires are worn down to or below the tread depth limit.
It notifies the driver that the road conditions are creating reduced friction between the tyres and road surface, hence, reduced traction. You'll see it on particularly wet roads, snow/ice covered roads, etc.
It doesn't wet roads take traction away from racing cars. Race cars are fastest with slick tires, when the road is wet it forces them to use threaded tires to dissplace the water. If the racers want to slide easily around corners that the wet road would be helpful