Description

Excellent performance; service life and value for a wide range of applications.

Product Overview

C-TEK(R) rotor & drums establish the foundation of the Centric offering. The C-TEK(R) line serves as an affordable OE replacement. All C-TEK(R) rotors and drums are protected on the shelf by a rust preventative oil.

Features and Benefits

• OE Vane Design & Plate Thickness
• Optimal Surface Finish
• For consistent stopping power
• Low Initial Lateral Run-Out and Disc-Thickness Variation
• For smooth, vibration free stopping
• Precision Balanced
• For vibration free performance

Product Details

ABS Tone Ring Included:	No
Bearings Included:	No
California Proposition 65 Site [basic]:	https://www.p65warnings.ca.gov/
California Proposition 65 Text [cntrc]:	WARNING: Cancer and Reproductive Harm
Center Hole Diameter:	2.528
Description:	C-Tek Standard Brake Rotor
Disc Mounting [cntrc]:	Floating
Discard Thickness:	8
Hat Finish:	Bare
Misc Holes [cntrc]:	4
Mounting Bolt Hole Circle Diameter:	114.300
Nominal Thickness:	9
Outside Diameter:	259.7
Overall Height:	48.300
Part Number:	sto121.40042
Product Grade [cntrc]:	Standard
Solid Or Vented Type Rotor:	Solid
Stud/Lug Hole Diameter:	12.600
Stud/Lug Hole Quantity:	5
Surface Type:	Smooth
Weight [cntrc] kgs:	3.860
Weight [cntrc] lbs:	8.500

Kit Options

This item is available as a full kit.
Select a kit option in the following table if you are looking for this item in a bundle form with all associated components.

Kit option/s:

Thumb	SKU	Kit Title
	sto905.40020	Centric OE Grade Front & Rear Brake Kit (4 Wheel) (1x sto301.05370, 1x sto301.06210, 2x sto121.40042, 2x sto121.40056)
	sto905.40021	Centric OE Grade Front & Rear Brake Kit (4 Wheel) (2x sto121.40057, 1x sto301.05370, 1x sto301.08290, 2x sto121.40042)
	sto905.40032	Centric OE Grade Front & Rear Brake Kit (4 Wheel) (2x sto121.40036, 1x sto301.05370, 1x sto301.05030, 2x sto121.40042)
	sto905.40041	Centric OE Grade Front & Rear Brake Kit (4 Wheel) (2x sto121.40036, 1x sto301.05370, 1x sto301.05030, 2x sto121.40042)
	sto905.40011	Centric OE Grade Front & Rear Brake Kit (4 Wheel) (2x sto121.40026, 1x sto301.05370, 1x sto301.05030, 2x sto121.40042)
	sto908.40507	Centric OE Grade Rear Brake Kit (2 Wheel) (1x sto301.05370, 2x sto121.40042)

Data: v4.2 - Upd: 2026-10-13 20:49:43

Specifications

Product Attributes - Brand

Centric Parts

Product Attributes - Manufacturer's Part Number

121.40042

Product Attributes - Part Type

Brake Rotors

Product Attributes - Product Line

Centric C-Tek Standard Brake Rotors

Product Attributes - UPC

805890174660

Product Attributes - Intended for Street Use

Yes

Product Attributes - For Use with Stock Calipers

Yes

Product Attributes - Rotor Construction

Solid

Product Attributes - Rotor Style

Solid surface

Product Attributes - Rotor Outside Diameter (in.)

10.22 in.

Product Attributes - Brake Rotor Bolt Pattern (in.)

5 x 4.50 in.

Product Attributes - Brake Rotor Bolt Pattern (mm)

5 x 114.30mm

Product Attributes - Nominal Thickness (in.)

0.354

Product Attributes - Nominal Thickness (mm)

9.00

Product Attributes - Discard Thickness (mm)

8.00

Product Attributes - Rotor Material

Iron

Product Attributes - Rotor Finish

Natural

Product Attributes - Quantity

Sold individually.

Compatibility