You need to find the right balance, however. If you pump the brakes too quickly the wheels will lock, but if you pump too slowly it will take longer to stop. There is no question that winter tires perform better on snow and ice than all-season tires. The design of the tire's surface ejects snow more effectively. The rubber used to make winter tires is softer, and therefore more flexible and effective in cold temperatures.
All tires have visual indicators at the bottom of the grooves that show up when the tires are worn.
To measure the depth of a tire groove, take a 25 piece and place it in the groove with the caribou's head downward. If the rubber does not come up to the animal's muzzle, traction in snow will be inadequate. Check varioux grooves in different places to detect any uneven wear. Say you keep your car in a garage that is heated to 18 C and your tires are inflated to 32 psi. Remember too that the best tire can lose up to 1 psi per month.