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.
A tire tread depth chart displays information on the minimum tread allowed on usable tires. The charts are available online from companies such as Tire Information Center, which has information relating to anything that is tire specific, such as tread depth and rotations. Continue Reading.