Description

StopTech Slotted Sport Rotors are 1-piece direct replacement brake discs for factory brake systems and stock calipers that look great behind your wheels – and offer significantly improved braking performance. The unique slotting aids with heat and brake dust dispersal; prevents glazing of the pads; adds bite and improves wet and dry braking performance. Built to last; the black e-coating provides protection from corrosion and the high carbon metallurgy (in most applications) offers quieter operation; better crack resistance and increased performance.

Product Overview

Excessive heat can cause resins in your brake pad to vaporize or "outgas." As the brake pad wears, the used friction material turns into a fine dust. This boundary layer of heat, gas and dust builds up between the pad and rotor surfaces and inhibits performance. Here's where StopTech SportStop slotted brake rotors make a big difference. StopTech SportStop Slotted Brake Rotors are a true performance rotor and feature: * Power Alloy castings (on select applications) - Engineered Performance Rotor - Superior resistance to cracking due to thermal stress - Increased molybdenum (higher carbon)content that extends reliability, service life and helps reduce NVH “noise” issues - Rotor material is a direct descendant of the patented AeroRotor from StopTech * Introducing directional curve vane design (on select applications) - Improved vane design or OE equivalent on all rotors - Center split castings * New short slot design runs perpendicular to the vane to preserve rotor strength. * Direct OE Replacement * Improved wet weather response * Increased initial “bite” * Double disc ground for a consistent friction surface and Improved pad bed-in * Mill balanced * Black E-Coated non-friction surfaces on “Power Alloy” rotors * Enhances open wheel appearance

Features and Benefits

• Premium e-coated rotor with advanced metallurgy that greatly reduces pad squeal. Especially effective with higher friction; European style brake pad compounds. Slotted for increased bite; improved looks and better performance
• Cryogenic Treatment Reduces Residual Stress
• Slots Helps Evacuate Gasses/Dust/Heat
• Directional Curve Vane Designs On Selected Apps
• Black E-Coated Non-Friction - Corrosion Protection
• Increased Initial bite and Wet Weather Response
• Superior Resistance To Cracks From Thermal Stress
• Double Disk Ground For Consistent Friction Surface
• Direct OE Replacement

Product Details

ABS Tone Ring Included:	No
Attribute ID (Type):	California Proposition 65
Attribute ID Type:	California Proposition 65
Bearings Included:	No
California Proposition 65 Site (basic):	https://www.p65warnings.ca.gov/
California Proposition 65 Site [basic]:	https://www.p65warnings.ca.gov/
California Proposition 65 Text (basic):	WARNING: Cancer and Reproductive Harm
California Proposition 65 Text [basic]:	WARNING: Cancer and Reproductive Harm
California Proposition 65:	WARNING: Cancer and Reproductive Harm
Center Hole Diameter:	2.504
Description:	StopTech Sport Slotted Brake Rotor; Rear Right
Disc Mounting (cntrc):	Floating
Disc Mounting [cntrc]:	Floating
Discard Thickness:	0.787
Hat Finish:	Coated
Hub Hole/Whl Reg [cntrc] mm:	63.6
Hub Hole/Whl Reg mm:	63.6
Misc Holes (cntrc):	1
Misc Holes [cntrc]:	1
Mounting Bolt Hole Circle Diameter:	108.000
Nominal Thickness:	21.900
Outside Diameter:	11.890
Overall Height:	40.900
Part Number:	sto126.39045SR
Position:	Rear Right
Rotor Type:	Slotted
Solid Or Vented Type Rotor:	Vented
Stud/Lug Hole Diameter:	15.800
Stud/Lug Hole Quantity:	5
Surface Type:	Slotted
Title:	StopTech Sport Slotted Brake Rotor; Rear Right
Vane Style (cntrc):	Pillar
Vane Style [cntrc]:	Pillar
WARNING CA Proposition 65 Message:	WARNING: Cancer and Reproductive Harm
WARNING CA Proposition 65:	Yes
Weight (cntrc) kgs:	6.930
Weight (cntrc) lbs:	15.250
Weight [cntrc] kgs:	6.930
Weight [cntrc] lbs:	15.250

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
	sto937.39507	Street Axle Pack, Slotted, Rear (1x sto308.13071, 1x sto126.39045SL, 1x sto126.39045SR)

Data: v4.2 - Upd: 2026-09-30 16:26:10

Features

Specifications

Product Attributes - UPC

805890629436

Product Attributes - Brand

StopTech

Product Attributes - Quantity

Sold individually.

Product Attributes - Part Type

Brake Rotors

Product Attributes - Rotor Style

Slotted surface

Product Attributes - Product Line

StopTech Slotted Brake Rotors

Product Attributes - Rotor Finish

Black E-Coat

Product Attributes - Rotor Material

Iron

Product Attributes - Rotor Construction

Vented

Product Attributes - Intended for Street Use

Yes

Product Attributes - Nominal Thickness (in.)

0.850 in.

Product Attributes - Manufacturer's Part Number

126.39045SR

Product Attributes - For Use with Stock Calipers

Yes

Product Attributes - Rotor Outside Diameter (in.)

11.89 in.

Compatibility