A rear brake rotor is a key component of a vehicle’s disc brake system located on the rear wheels. It works with the brake pads and caliper to slow or stop the car.
Here’s a quick breakdown:
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Function: When you press the brake pedal, the caliper squeezes the brake pads against the rotor. The friction between the pads and the spinning rotor slows the wheel down.
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Material: Usually made from cast iron, though some high-performance or luxury vehicles use carbon or composite materials.
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Signs it needs replacement:
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Vibration or pulsation when braking
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Grinding or squealing noises
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Visible scoring, rust, or uneven wear on the rotor surface
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Brake performance feels reduced
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If you’re doing maintenance or considering replacement, it’s important to:
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Replace rotors in pairs (both rear sides) for balanced braking
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Check the minimum thickness specification (stamped on the rotor edge)
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Always replace or resurface rotors when installing new brake pads
Would you like me to show you how to replace rear brake rotors step by step, or do you want help choosing the right rotors for your specific vehicle?