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Centric 121.66004 Disc Brake Rotor - Front
Reliable Disc Brake Rotor for Chevrolet, Dodge, and GMC Trucks
The Centric 121.66004 disc brake rotor is engineered for heavy-duty applications on Chevrolet K30, K3500, Dodge V30, V3500, and GMC W350 models. Designed to meet strict OEM specifications, this rotor ensures consistent braking performance and durability under demanding conditions.
- Part Number: 121.66004
- Brand: Centric
- Brand Line: C-TEK Standard Disc Brake Rotors
- Vented rotor design with straight vane style for improved heat dissipation
- Outside diameter: 12.870 inches (326.9 mm)
- Nominal thickness: 1.535 inches (38.99 mm); discard thickness: 1.465 inches (37.21 mm)
- Overall height: 3.079 inches (78.2 mm)
- Mounting bolt hole quantity: 8 with 0.587 inch (14.9 mm) diameter
- Center hole diameter: 5.008 inches (127.2 mm)
- Surface type: smooth for consistent pad contact
- Disc mounting behind the hub
- Weight: approximately 28.5 lbs (12.95 kgs)
About the C-TEK Standard Disc Brake Rotors Line
The C-TEK Standard Disc Brake Rotors line by Centric is designed to provide reliable, OEM-quality replacement rotors for a variety of truck applications. This product line focuses on delivering rotors with precise dimensions and vented designs to maintain optimal braking performance and heat management. The 121.66004 rotor fits within this line, offering a vented, smooth surface rotor that meets the specifications required for Chevrolet, Dodge, and GMC heavy-duty trucks.
Product Details and Specifications
This vented disc brake rotor features a straight vane design that enhances airflow and cooling during braking, reducing the risk of brake fade. The rotor’s nominal thickness of 1.535 inches (38.99 mm) and discard thickness of 1.465 inches (37.21 mm) ensure a long service life while maintaining safety standards. With an outside diameter of 12.870 inches (326.9 mm) and an overall height of 3.079 inches (78.2 mm), this rotor is engineered to fit securely behind the hub with eight mounting bolt holes sized at 0.587 inches (14.9 mm) diameter. The smooth surface type promotes even pad wear and consistent braking response. Note that this rotor does not include an ABS tone ring or bearings.
Common Applications and Problem Solving
- Replacement for worn or warped rotors on Chevrolet K30 and K3500 trucks
- Restores braking performance on Dodge V30 and V3500 heavy-duty models
- Addresses brake pulsation and noise issues caused by rotor surface irregularities
- Improves heat dissipation to reduce brake fade during heavy towing or hauling
- Ensures proper rotor thickness for safe braking and compliance with manufacturer specifications
Installation Notes and Tips
- Verify compatibility with Chevrolet K30, K3500, Dodge V30, V3500, and GMC W350 models before installation
- Inspect mounting hardware and hub surface for cleanliness and damage prior to rotor installation
- Ensure rotor thickness is above discard thickness to maintain safety and performance
- Use proper torque specifications on mounting bolts to avoid rotor warping
- Brake pads should be inspected and replaced if worn to ensure optimal rotor performance
Quality Assurance and Warranty
Centric’s C-TEK Standard Disc Brake Rotors are manufactured to meet or exceed OEM standards for fit, form, and function. Each rotor undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details for part number 121.66004 are not provided here, Centric typically offers limited warranties covering defects in materials and workmanship. Consult product documentation or Centric directly for warranty terms.
| Brand | Centric |
|---|---|
| Part Number | 121.66004 |
| Position | C-TEK Standard Disc Brake Rotors, Front |
| ABS Tone Ring Included | No |
| Bearings Included | No |
| Center Hole Diameter | 5.008 |
| Center Hole Diameter | 127.200 |
| Disc Mounting [cntrc] | Behind the Hub |
| Discard Thickness | 1.465 |
| Discard Thickness | 37.210 |
| Misc Holes [cntrc] | 0 |
| Mounting Bolt Hole Circle Diameter | 6.500 |
| Mounting Bolt Hole Circle Diameter | 165.100 |
| Mounting Bolt Hole Diameter | 0.587 |
| Mounting Bolt Hole Diameter | 14.900 |
| Mounting Bolt Hole Quantity | 8 |
| Nominal Thickness | 1.535 |
| Nominal Thickness | 38.990 |
| Outside Diameter | 12.870 |
| Outside Diameter | 326.900 |
| Overall Height | 3.079 |
| Overall Height | 78.200 |
| Solid Or Vented Type Rotor | Vented |
| Surface Type | Smooth |
| Vane Style [cntrc] | Straight |
| Weight [cntrc] kgs | 12.950 |
| Weight [cntrc] lbs | 28.500 |
This part fits 61 vehicles. Search below:
| Year | Make | Model | Body Type | Position | Notes |
|---|---|---|---|---|---|
| 2000 | Chevrolet | K3500 | Extended Cab Pickup | Front | Fitment: Designed for vehicles with Single Rear Wheel setups; C-TEK Standard Disc Brake Rotors |
| 2000 | Chevrolet | K3500 | Cab & Chassis | Front | 327mm Front Disc; DRW; C-TEK Standard Disc Brake Rotors |
| 2000 | GMC | K3500 | Extended Cab Pickup | Front | Fitment: Designed for vehicles with Single Rear Wheel setups; C-TEK Standard Disc Brake Rotors |
| 1999 | Chevrolet | K3500 | Extended Cab Pickup | Front | Fitment: Designed for vehicles with Single Rear Wheel setups; C-TEK Standard Disc Brake Rotors |
| 1999 | Chevrolet | K3500 | Cab & Chassis | Front | 327mm Front Disc; DRW; C-TEK Standard Disc Brake Rotors |
| 1999 | GMC | K3500 | Extended Cab Pickup | Front | Fitment: Designed for vehicles with Single Rear Wheel setups; C-TEK Standard Disc Brake Rotors |
| 1999 | GMC | K3500 | Cab & Chassis | Front | 327mm Front Disc; DRW; C-TEK Standard Disc Brake Rotors |
| 1998 | Chevrolet | K3500 | Extended Cab Pickup | Front | Fitment: Designed for vehicles with Single Rear Wheel setups; C-TEK Standard Disc Brake Rotors |
| 1998 | Chevrolet | K3500 | Cab & Chassis | Front | 327mm Front Disc; DRW; C-TEK Standard Disc Brake Rotors |
| 1998 | GMC | K3500 | Extended Cab Pickup | Front | Fitment: Designed for vehicles with Single Rear Wheel setups; C-TEK Standard Disc Brake Rotors |
| 1998 | GMC | K3500 | Cab & Chassis | Front | 327mm Front Disc; DRW; C-TEK Standard Disc Brake Rotors |
| 1997 | Chevrolet | K3500 | Extended Cab Pickup | Front | Fitment: Designed for vehicles with Single Rear Wheel setups; C-TEK Standard Disc Brake Rotors |
| 1997 | Chevrolet | K3500 | Cab & Chassis | Front | 327mm Front Disc; DRW; C-TEK Standard Disc Brake Rotors |
| 1997 | GMC | K3500 | Extended Cab Pickup | Front | Fitment: Designed for vehicles with Single Rear Wheel setups; C-TEK Standard Disc Brake Rotors |
| 1997 | GMC | K3500 | Cab & Chassis | Front | 327mm Front Disc; DRW; C-TEK Standard Disc Brake Rotors |
| 1996 | Chevrolet | K3500 | Front | 327mm dia; DRW; C-TEK Standard Disc Brake Rotors | |
| 1996 | GMC | K3500 | Front | 327mm dia; DRW; C-TEK Standard Disc Brake Rotors | |
| 1995 | Chevrolet | K3500 | Front | 327mm dia; DRW; C-TEK Standard Disc Brake Rotors | |
| 1995 | GMC | K3500 | Front | 327mm dia; DRW; C-TEK Standard Disc Brake Rotors | |
| 1994 | Chevrolet | K3500 | Front | 327mm dia; DRW; C-TEK Standard Disc Brake Rotors | |
| 1994 | GMC | K3500 | Front | 327mm dia; DRW; C-TEK Standard Disc Brake Rotors | |
| 1993 | Chevrolet | K3500 | Front | 327mm dia; DRW; C-TEK Standard Disc Brake Rotors | |
| 1993 | Dodge | W350 | Front | 1/2"-20 Studs; Casting# 100353; C-TEK Standard Disc Brake Rotors | |
| 1993 | GMC | K3500 | Front | 327mm dia; DRW; C-TEK Standard Disc Brake Rotors | |
| 1992 | Chevrolet | K3500 | Front | 327mm dia; DRW; C-TEK Standard Disc Brake Rotors | |
| 1992 | Dodge | W350 | Front | 1/2"-20 Studs; Casting# 100353; C-TEK Standard Disc Brake Rotors | |
| 1992 | GMC | K3500 | Front | 327mm dia; DRW; C-TEK Standard Disc Brake Rotors | |
| 1991 | Chevrolet | K3500 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1991 | Chevrolet | V3500 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1991 | Dodge | W350 | Front | 1/2"-20 Studs; Casting# 100353; C-TEK Standard Disc Brake Rotors | |
| 1991 | GMC | K3500 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1991 | GMC | V3500 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1990 | Chevrolet | K3500 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1990 | Chevrolet | V3500 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1990 | Dodge | W350 | Front | 1/2"-20 Studs; Casting# 100353; C-TEK Standard Disc Brake Rotors | |
| 1990 | GMC | K3500 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1990 | GMC | V3500 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1989 | Chevrolet | V3500 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1989 | GMC | V3500 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1988 | Chevrolet | V30 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1988 | GMC | V3500 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1987 | Chevrolet | V30 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1987 | GMC | V3500 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1986 | Chevrolet | K30 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1986 | GMC | K3500 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1985 | Chevrolet | K30 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1985 | GMC | K3500 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1984 | Chevrolet | K30 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1984 | GMC | K3500 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1983 | Chevrolet | K30 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1983 | GMC | K3500 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1982 | Chevrolet | K30 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1982 | GMC | K3500 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1981 | Chevrolet | K30 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1981 | GMC | K3500 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1980 | Chevrolet | K30 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1980 | GMC | K3500 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1979 | Chevrolet | K30 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1979 | GMC | K3500 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1978 | Chevrolet | K30 | Front | Fitment: Heavy Duty Dual Rear Wheels.; C-TEK Standard Disc Brake Rotors | |
| 1977 | Chevrolet | K30 | Front | Fitment: 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.