The primary contributor of skin color is the pigment known as melanin. The quantity of melanin in the skin varies based on genetic factors and is also dependent on the degree of sun exposure. Melanin is produced by specialized pigment cells known as melanocytes.
Average new tires used on cars typically start with 10/32 to 11/32 of original tread depth. Tires are considered worn out. In most States when they reach 2/32 of remaining tread depth. Ans 2 - Here in Canada (and I'm sure in many parts of the US ) we get a lot of rain.
What Is a Bald Tire? The part of a tire that contacts the road is called the tread, and this tread wears down over time. When a tire's tread is completely worn down to the wear bars, you have a bald tire. And if your vehicle has bald tires, you need new tires right away-driving on bald tires is not safe.