Your Mercury Grand Marquis Brake Rotors are actually not a whole lot different from the wheels of a bicycle, and they slow and stop your car in the same way. A pair of calipers grab either side of the rotor, which consists of a metal disk, and squeezes it tightly until the wheel to which it is attached comes to a stop. The only difference is one of degree: a 30-40 lb.

bicycle with a 120 - 250 lb. rider traveling at 10-15 MPH contains far less mass, and is therefore obviously easier to stop than a 1-3 ton automobile traveling at 35 - 60 MPH.

Bicycle brakes have rubber calipers working against metal rims; automobile brakes have metal calipers. Although the Mercury Grand Marquis Brake Rotors are also made of metal, they are covered with a coating of resin, steel wool and sometimes Kevlar, called the brake pad. This pad provides the friction which actually stops the vehicle. When this pad starts to wear - usually by around 100,000 miles - the brakes will produce a whining noise when applied. If not replaced before they wear through completely, the calipers will start to grab onto the bare metal of the rotor. This will result in major damage to both, and create grooves in the rotor. Brake rotors can also be cracked, or become warped if overheated. If you ride the brakes on steep downgrades on a regular basis, you're risking this type of brake rotor damage.Extend brake life by downshifting when traveling downhill, and when you need Mercury Grand Marquis Brake Rotors, as well as any other Mercury parts or accessories - come see us for the best selection and lowest prices.