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- Rear Disc Brake Rotor
Part TypeBrake Rotor
BrandACDELCO
Package Height4.8
Package Width13.1
Package Length13.1
Weight37.4 PG
Weight37.4
Center Bore Diameter (Mm)139.7mm
Overall Rotor Diameter (Mm)322.33mm
Center Bore Diameter (In)5.5in
Number Of Lugs5
Center Hole Diameter5.5
Disc ConstructionVented
Good Maintenance Practices - Section 1 - Bullet 1Check brake fluid level at every oil change. Replace fluid according to owner's manual recommendations.
Max Center Hole Diameter5.51 in (139.954 mm)
Abs Sensor Ring IncludedYes
Good Maintenance Practices - Section 1 - Bullet 4Check the thickness of your brake pads.
Good Maintenance Practices - Section 1 - Bullet 2Calipers and wheel cylinders should be checked every brake inspection and serviced or replaced as required.
Good Maintenance Practices - Section 1 - Bullet 3Inspect the brake lines for rust, punctures, or visible leaks (You may be able to do this, but consult a qualified technician if necessary).
Pad Contact Surface Width (Mm)69.1
Center Hole Diameter (Mm)139.95
Disc FinishTurned
Stud/Lug Hole Quantity5
Nominal Thickness (Mm)30.073
Product DescriptionACDelco Gold (Professional) Disc Brake Rotors are a high quality alternative to Original Equipment (OE) parts. They feature a thickness variation that is less than 0.0004 to minimize pedal pulsation, noise, and help to extend brake pad life. These rotors meet the SAE standard for structural integrity with OE matched G3000 qualified material delivering guaranteed performance. Also, no machining is required. ACDelco Gold (Professional) Disc Brake Rotors are ready to be installed right out of the box. ACDelco Gold (Professional) parts are manufactured to meet your expectations for fit, form, and function, making them a smart choice for General Motors vehicles, as well as most makes and models, including special applications. These high-quality parts are backed by General Motors. Some ACDelco Gold parts may have formerly appeared as ACDelco Professional. ⚠<b> WARNING:</b> Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Mounting Bolt Hole Quantity5
Bolt Circle Diameter (Mm)222.3
ConstructionFull Cast
Overall Rotor Diameter12.69 in (322.3 mm)
Width (In)13.1
Pad Contact Surface Width2.7
Hat FinishTurned
Pitch Circle Diameter (Mm)285.75
Discard Thickness (Mm)26.924
Mounting Bolt Hole Circle Diameter11.25
Overall Height (Mm)105.92
Length (In)13.1
PositionRear
Abs Tone Ring IncludedNo
Surface TypeSmooth
Bolt Circle Diameter (In)8.8
Pitch Circle Diameter11.25 in (285.8 mm)
Outside Diameter322.35
Part CategoryReplacement Parts
Overall Height105.9
Thickness (Mm)30.073
Good Maintenance Practices - Section 2 - Bullet 3Inspection of wheel bearings and grease seals.
Thickness1.184 in (30.1 mm)
Bolt Circle Diameter8.8
Good Maintenance Practices - Section 2 - Bullet 4Parking brake adjustments (as needed).
Programming RequiredNo
Discard Thickness1.06
Outside Diameter (Mm)322.33
Good Maintenance Practices - Section 2 - Bullet 1Inspection of the brake hoses for brittleness or cracking.
Includes Abs Sensor RingNo
Good Maintenance Practices - Section 2 - Bullet 2Inspection of brake lining and pads for wear or contamination by brake fluid or grease.
Good Maintenance Practices - Section 2 - HeaderThe following should be conducted by a qualified technician:
Max Bolt Hole Diameter (Mm)13.97
Faq - Answer 1Yes, ACDelco also offers GM OE brake rotor and Advantage brake rotors.
Features &#38; Benefits - Bullet 6Manufactured to meet specifications for fit, form, and function for General Motors vehicles as well as most makes and models
Inside Diameter7.25
Features &#38; Benefits - Bullet 2Independently tested with Noise/Vibration/Harshness (NVH) and durability/wear testing; resulting in high quality and reliable products
Max Bolt Hole Diameter0.55 in (13.97 mm)
Bolt Hole Quantity5
Grade TypeRegular
Features &#38; Benefits - Bullet 3Follows original manufacturers' designs for dispersing heat, helping to prolong pad and rotor life while reducing noise and vibration
Features &#38; Benefits - Bullet 4Some ACDelco Gold parts may have formerly appeared as ACDelco Professional
Features &#38; Benefits - Bullet 5Premium aftermarket replacement part
Height (Mm)105.9
Features &#38; Benefits - Bullet 1Inspected for balance; resulting in smooth brake operation and noise reduction
Mounting Bolt Hole Diameter13.35
Solid Or Vented Type RotorVented
Good Maintenance Practices - Section 1 - HeaderThe following inspections and maintenance procedures can help prevent potential brake problems:
MaterialCast Iron
Height (In)4.2
Rust Resistant CoatingYes
SlottedNo
Signs Of Wear &#38; Troubleshooting - Section 1 - Bullet 4Vehicle pulls to the left or right when brakes are applied.
Signs Of Wear &#38; Troubleshooting - Section 1 - Bullet 5Visible ridges or deep grooves on the rotor surface.
Conventional Or Drum-In-Hat Type RotorConventional
Nominal Thickness1.184
Faq - Question 1Does ACDelco offer other grades of brake rotors?
Vendor Part Number18A2771
Package Qty1
Package TypeEA
No Questions
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Some parts are not legal for use in California or other states with similar laws / regulations
