An acronym for Antilock Braking System. ABS eliminates wheel lockup during braking and loss of steering control on slippery surfaces. Speed sensors monitor each wheel and reduce brake pressure on any wheel rotating significantly slower than the others. 2-channel systems combine 2 wheels, such as the left front and right rear into one channel. The right front and left rear wheel form the other channel.
Any wheel lockup causes brake pressure reduction on both wheels of each channel.
3-channel ABS systems combine the rear wheels into one channel. The front wheels have individual channels. The most sophisticated ABS systems use 4-channels, one for each wheel, for maximum control and braking power. The caliper ensures that the brake pads exert even pressure on the disc. Brakes, Disc A brake that uses a disc shaped rotor and calipers that hold friction pads.