car tires,why are they all black
Cost. White-walls are (were?) more expensive.
confusing situation seek at yahoo that will will help
All tire manufacturers add carbon black to their tires to protect them from harmful UV radiation, which gives them the characteristic black color.
An electronic sensor detects when one or more of the car's wheels stops turning. The car's computer then eases back the break pressure on that wheel. It can do this multiple times per second. The end result is feels and sounds like a pulsing of the breaks, like a low pitch bass note. The action is similar to when you pump the breaks on a non ABS car, but the ABS is more precise.
ABS pumps the brakes faster than you can. when it scenes a wheel skidding the pump turns on and quickly applies and releases the brakes so that the tires do not lock up. This is done because when a tire locks up it looses traction, and you cannot steer. ABS does not decrease braking distance, it's purpose is to maintain control when braking, meaning you can still steer (somewhat) the car when the ABS activates.
