Silver / Advantage; Non-Coated
ACDelco Silver (Advantage) non-coated brake rotors provide reliable braking power. Application-specific vane configurations offer safety and performance, minimize noise and vibration, and maximize airflow to help keep your rotor running cool. They also feature a non-directional ground finish that minimizes thickness variation and helps increase brake pad life. These dependable rotors offer quality at an economical price.

Features & Benefits:
  • Manufactured with multiple alloys for optimum heat dissipation and performance
  • Mill-balanced for proper rotor function; no extra weights needed
  • Quality validated for proper metallurgy and correct brake plate thickness
  • Non-directional brake surface finish for consistent braking
  • Rounded radius for added strength

ACDELCO 18A489A Specifications
Abs Tone Ring IncludedNo
Bearings IncludedNo
Bolt Circle Diameter (IN)6.5
Bolt Circle Diameter (MM)165.1
Center Bore Diameter (IN)5.4in
Center Bore Diameter (MM)137.2mm
Center Hole Diameter (IN)5.4
Center Hole Diameter (MM)137.15
ConstructionFull Cast
Conventional Or Drum-In-Hat Type RotorConventional
Directional or Non-Directional Brake SurfaceNo
Disc FinishNon-Directional
Discard Thickness (IN)1.215
Discard Thickness (MM)30.85
Hat FinishPlain
Height (IN)2.8
Height (MM)71.1
Length (IN)12.8
MaterialCast Iron
Mounting Bolt Hole Circle Diameter (IN)6.5
Mounting Bolt Hole Circle Diameter (MM)165.1
Mounting Bolt Hole Diameter (IN)0.64
Mounting Bolt Hole Diameter (MM)16.25
Nominal Thickness (IN)1.285
Nominal Thickness (MM)32.65
Outside Diameter (IN)12.5
Outside Diameter (MM)317.5
Overall Height (IN)2.755
Overall Height (MM)70
Rust Resistant CoatingNo
SlottedNo
Solid Or Vented Type RotorVented
Surface TypeSmooth
Weight (lb)20.5
Width (IN)12.8