Built for everyday stops, the Raybestos R-Line 580503R is a vented front brake rotor for the 2007-2010 Chevrolet Cobalt and 2007-2010 Pontiac G5. It is a direct-fit replacement on versions of these cars that use a 280 mm (11.024 in) front rotor. It will not fit trims equipped with larger front brakes.
Raybestos designs its R-Line rotors and drums for everyday driving conditions, aiming for dependability, safety and performance.
- OE fit, form and function: Developed from OE samples and made with G3000-qualified material to match OE fit, form and function for dependable braking.
- SAE standard: Meets the SAE standard for tensile strength, which supports the rotor's structural integrity.
- Low initial lateral runout and thickness variation: Designed to help reduce pedal pulsation and brake noise and to help extend pad life.
- Mill balanced edges: Mill balanced and 100 percent validated, which helps minimize thickness variation and vibration for smoother stopping.
Specifications: Cast iron, vented, conventional (not drum-in-hat) design with a non-directional braking surface. Outside diameter 11.024 in (280 mm). Nominal thickness 0.945 in (24 mm). Discard thickness 0.906 in (23 mm). Overall height 1.84 in (46.75 mm). Center hole 2.59 in (65.8 mm). Five 0.557 in (14.15 mm) mounting bolt holes on a 4.331 in (110 mm) bolt circle. The ABS tone ring is not included. Country of origin: China.
This rotor is sold individually. The listed applications use two front rotors, so replacing both sides together is recommended for even, balanced braking. See the "Vehicles it fits" section for full fitment details.
Frequently Asked Questions
Is this the right front brake rotor for a 2007-2010 Chevrolet Cobalt or 2007-2010 Pontiac G5?
Yes, it fits versions of these cars that use a 280 mm (11.024 in) front rotor. It will not fit trims equipped with larger front brakes, so check the "Vehicles it fits" section.
What does a disc brake rotor do?
The rotor turns with the wheel, and the caliper squeezes the pads against it to slow the vehicle. This rotor's vented design lets air flow through its internal vanes to help shed heat.
What are the key measurements of the 580503R?
It measures 11.024 in (280 mm) across, with a 0.945 in (24 mm) nominal thickness and a 0.906 in (23 mm) discard thickness. It has five bolt holes on a 4.331 in (110 mm) circle.
Do I need to buy two rotors?
It is sold individually. The listed applications use two front rotors, and replacing both sides together is recommended for even, balanced braking.
What signs suggest a brake rotor may need replacing?
Common signs include pedal pulsation, vibration while braking, grinding, deep scoring, or a rotor worn to its 0.906 in (23 mm) discard thickness. Have the brakes inspected to confirm the cause.
