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Centric 121.66034 Disc Brake Rotor - FrontOE Quality 60-Day Returns
Part #: 121.66034

Centric 121.66034 Disc Brake Rotor - Front

C-TEK Standard Disc Brake Rotors, Front
52 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
C-TEK Standard Disc Brake Rotors, Front
Fitment: Chevrolet and GMC, Express 3500, Savana 3500, C3500, G30, and G3500
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Reliable Disc Brake Rotor for Chevrolet and GMC 3500 Series

The Centric C-TEK Standard Disc Brake Rotor 121.66034 is engineered for dependable braking performance on heavy-duty vehicles. Designed specifically for Chevrolet and GMC 3500 series models, this vented rotor ensures consistent heat dissipation and smooth braking under demanding conditions.

  • Compatible with Chevrolet C3500, Express 3500 and GMC G30, Savana 3500 models
  • Vented disc design with straight vane style for enhanced cooling
  • Includes ABS tone ring for integrated anti-lock braking system functionality
  • Nominal thickness of 1.539 inches (39.100 mm) with discard thickness at 1.465 inches (37.210 mm)
  • Overall diameter of 12.496 inches (317.400 mm) and overall height of 8.197 inches (208.200 mm)
  • Stud thread diameter of 14 mm and bolt thread pitch of 1.5 mm for secure mounting
  • Eight stud/lug holes with a mounting bolt hole circle diameter of 6.5 inches (165.100 mm)
  • Center hole diameter of 4.567 inches (116.000 mm) for precise fitment
  • Weight approximately 49 lbs (22.27 kgs) for balanced performance

About the C-TEK Standard Disc Brake Rotors Line

The C-TEK Standard Disc Brake Rotors line by Centric offers a balance of quality and value for professional and commercial vehicle applications. This product line focuses on providing rotors that meet or exceed OEM specifications, featuring vented designs for improved heat management and smooth surface finishes to reduce brake pad wear. The 121.66034 rotor is part of this line, delivering reliable braking performance for Chevrolet and GMC 3500 series trucks and vans.

Product Details and Specifications

This disc brake rotor features a vented design with straight vanes that promote efficient airflow to dissipate heat during braking. The smooth surface finish helps minimize brake pad wear and noise. The rotor includes an ABS tone ring, ensuring compatibility with factory anti-lock braking systems. With a nominal thickness of 1.539 inches and a discard thickness of 1.465 inches, this rotor maintains structural integrity and safety throughout its service life. The precise stud thread diameter and bolt pitch ensure secure installation on the hub and rotor assembly.

Common Applications and Problem Solving

  • Replacement for worn or warped rotors causing brake pulsation or vibration
  • Upgrading from solid to vented rotors for improved heat dissipation
  • Restoring ABS functionality with included tone ring
  • Addressing rotor thickness below manufacturer discard limits
  • Ensuring proper fitment on Chevrolet C3500, Express 3500, GMC G30, and Savana 3500 vehicles

Installation Notes and Tips

  • Verify rotor thickness before installation to ensure it meets minimum discard specifications
  • Clean mounting surfaces to prevent uneven rotor seating
  • Torque lug nuts to manufacturer specifications to avoid rotor warping
  • Inspect related components such as bearings and seals (inner bearing #410.91035, outer bearing #415.66000) during installation
  • Ensure ABS tone ring is properly aligned for accurate sensor readings

Quality Assurance and Warranty

Centric C-TEK Standard Disc Brake Rotors are manufactured to meet OEM standards for fit, form, and function. Each rotor undergoes rigorous quality control to ensure durability and performance. While specific warranty details are not provided here, Centric typically offers coverage against defects in materials and workmanship. Refer to Centric's official documentation for complete warranty information.

BrandCentric
Part Number121.66034
PositionC-TEK Standard Disc Brake Rotors, Front
ABS Tone Ring IncludedYes
Bearings IncludedNo
Bolt Thread Pitch1.500
Center Hole Diameter4.567
Center Hole Diameter116.000
Disc Mounting [cntrc]Hub & Rotor
Discard Thickness1.465
Discard Thickness37.210
Inner Bearing # [cntrc]410.91035
Inner Seal # [cntrc]417.66008
Misc Holes [cntrc]0
Mounting Bolt Hole Circle Diameter6.500
Mounting Bolt Hole Circle Diameter165.100
Nominal Thickness1.539
Nominal Thickness39.100
Outer Bearing # [cntrc]415.66000
Outer Race # [cntrc]416.66000
Outside Diameter12.496
Outside Diameter317.400
Overall Height8.197
Overall Height208.200
Solid Or Vented Type RotorVented
Stud Thread Diameter14.000
Stud/Lug Hole Quantity8
Surface TypeSmooth
Vane Style [cntrc]Straight
Weight [cntrc] kgs22.270
Weight [cntrc] lbs49.000

This part fits 52 vehicles. Search below:

YearMakeModelBody TypePositionNotes
2002ChevroletExpress 3500FrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
2002GMCSavana 3500FrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
2001ChevroletExpress 3500Cutaway VanFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
2001GMCSavana 3500Cutaway VanFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
2000ChevroletC3500Standard Cab PickupFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
2000ChevroletC3500Extended Cab PickupFrontSRW or DRW; C-TEK Standard Disc Brake Rotors
2000ChevroletC3500Crew Cab PickupFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
2000ChevroletC3500Cab & ChassisFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
2000ChevroletExpress 3500FrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
2000GMCC3500Standard Cab PickupFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
2000GMCC3500Extended Cab PickupFrontSRW or DRW; C-TEK Standard Disc Brake Rotors
2000GMCC3500Crew Cab PickupFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
2000GMCC3500Cab & ChassisFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
2000GMCSavana 3500FrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1999ChevroletC3500Standard Cab PickupFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1999ChevroletC3500Extended Cab PickupFrontSRW or DRW; C-TEK Standard Disc Brake Rotors
1999ChevroletC3500Crew Cab PickupFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1999ChevroletC3500Cab & ChassisFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1999ChevroletExpress 3500FrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1999GMCC3500Standard Cab PickupFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1999GMCC3500Extended Cab PickupFrontSRW or DRW; C-TEK Standard Disc Brake Rotors
1999GMCC3500Crew Cab PickupFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1999GMCC3500Cab & ChassisFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1999GMCSavana 3500FrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1998ChevroletC3500Standard Cab PickupFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1998ChevroletC3500Extended Cab PickupFrontSRW or DRW; C-TEK Standard Disc Brake Rotors
1998ChevroletC3500Crew Cab PickupFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1998ChevroletC3500Cab & ChassisFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1998ChevroletExpress 3500FrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1998GMCC3500Standard Cab PickupFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1998GMCC3500Extended Cab PickupFrontSRW or DRW; C-TEK Standard Disc Brake Rotors
1998GMCC3500Crew Cab PickupFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1998GMCC3500Cab & ChassisFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1998GMCSavana 3500FrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1997ChevroletC3500Standard Cab PickupFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1997ChevroletC3500Extended Cab PickupFrontSRW or DRW; C-TEK Standard Disc Brake Rotors
1997ChevroletC3500Crew Cab PickupFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1997ChevroletC3500Cab & ChassisFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1997ChevroletExpress 3500FrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1997GMCC3500Standard Cab PickupFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1997GMCC3500Extended Cab PickupFrontSRW or DRW; C-TEK Standard Disc Brake Rotors
1997GMCC3500Crew Cab PickupFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1997GMCC3500Cab & ChassisFrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1997GMCSavana 3500FrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1996ChevroletC3500FrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1996ChevroletExpress 3500FrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1996ChevroletG30FrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1996GMCC3500FrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1996GMCG3500FrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1996GMCSavana 3500FrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1995ChevroletC3500FrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors
1995GMCC3500FrontFitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

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