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Friday, 23 Jun 2017
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Cross Drilled vs. Slotted vs. Combo | Which One Would You Choose?

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Product Review: Slotted Rotors vs. Drilled vs. Premium
What goes up must come down and the difference is whether you will land softly or crash into the ground leaving pieces everywhere. The same concept can be applied in our cars. As you upgrade the power and make the car reach speeds a lot faster, slowing down will need to be improved as well the ability to safely maneuver. There are many different kinds of pads that help stop faster, but do the rotors make a difference of how quickly the car will stop? There are many different theories about the various types of rotors out there. It’s time to lay those theories to rest and end the controversy that many people are talking about.

On many message and chat boards, a lot of people believe that the stock rotor without any holes or slots is the best because you have full contact between the pad and the rotor thus

Rotor Choices

Brembo Sport Cross Drilled Rotors
With Brembo Sport Cross Drilled Rotors you can find both an introductory performance solution combined with an appealing aesthetic application The Brembo Sport Brake Systems consist of a set of 1piece ...
Brembo Sport Slotted Rotors
With Brembo Sport Slotted Rotors you can find both an introductory performance solution combined with an appealing aesthetic application The Brembo Sport Brake Systems consist of a set of 1piece drill ...
DBA Brake Rotors - 4000 Series
DBA 4000 Series Rotors are a midseries enhanced performance rotor These rotors feature Thermal Stability Profiling TSP for improved heat handling and ThermoGraphic paint markings for effective heat mo
DBA Brake Rotors - 5000 Series
DBA 5000 Series Rotors are a highseries enhanced performance rotors These rotors feature Thermal Stability Profiling for improved heat handling ThermoGraphic paint markings for effective heat monitori
DBA Brake Rotors - Pursuit Series
DBA Pursuit Series Rotors are based on the popular 4000 Series Rotors but engineered for the extreme conditions of emergency vehicles These rotors feature Thermal Stability Profiling TSP for improved ...
DBA Brake Rotors - Street Series
DBA Street Series Rotors are an entry level enhanced performance rotor offering improved braking straight out of the box The DBA Standard Rotors are offered in three configurations Standard Slotted a ...
DBA Brake Rotors - Survival Series
The Disc Brakes Australia DBA4x4 Survival Brake Series addresses one of the most overlooked road safety issues the stopping performance of 4WD vehicles DBA has applied its award winning technology to ...
DBA Replacement Parts
Replace discs and hats on 5000 Series Rotors are available for order To find the correct application for your needs you need to know the part of the kit you currently have Once you have that its si ...
Evolution Motorsports 325mm Replacement Rotors
These OEM balanced and xdrilled rotors are a key component to the Evolution Motorsports 325mm Big Brake Upgrade These components are offered as replacements for worn out components or for building you ...
NEUSPEED Brake - Slotted Rotors
NEUSPEED rotors are designed with a unidirectional pattern therefore each rotor kit consists of a left and right unit After machining all rotors are balanced to within one gram and then black cadmium ...
NEUSPEED Brakes - Cross Drilled Rotors
NEUSPEED rotors are designed with a unidirectional pattern therefore each rotor kit consists of a left and right unit After machining all rotors are balanced to within one gram and then black cadmium ...
Password JDM Performance Brake Rotors
Brakes are the one area of performance modifications that are often misunderstood Some think the OEM stock is fine some think that BBKs are a must and there are probably a dozen or so opinions about x ...
Power Slot Slotted Brake Rotors
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 betw ...
Rotora Brake Rotors - Basic OEM
Developed with the same parameters as the Original Equipment OE specifications in both quality and finish Rotoras direct replacement brake discs are assured to meet and exceed all vehicle manufacturer ...
Rotora Brake Rotors - Drilled & Slotted
Developed with the same parameters as the Original Equipment OE specifications in both quality and finish Rotoras direct replacement brake discs are assured to meet and exceed all vehicle manufacturer ...
Rotora Brake Rotors - Slotted
Developed with the same parameters as the Original Equipment OE specifications in both quality and finish Rotoras direct replacement brake discs are assured to meet and exceed all vehicle manufacturer ...
Rotora Rebuild Parts - Disc Components
Rebuilding your Rotora Rotors or Big Brake System Look here for all the parts you need to get your kit stopping like new ...
STILLEN Curved Vane Rotor Upgrade
The GTRs original equipment OE brake discs just dont have the staying power when pushed to the limits Premature brake disc cracking is something no one wants to see after a day of fun It didnt take lo ...
STILLEN Spec-T Performance Rotors
STILLEN Brake Pros now offers the SpecT line of rotor systems the highest level upgrade when keeping with the original equipment calipers Available in crossdrilled AND slotted or slottedonly configura ...
STILLEN Sport Rotors - 1-Piece
STILLEN 1piece Sport Rotors are a great choice for performance durability and style when staying with OE factory calipers These highperformance upgrades directly replace those plain OE factory rotors ...
STILLEN Sport Rotors - 2-Piece
STILLEN 2piece Sport Rotors are the best choice for performance durability and style when staying with OE factory calipers These highperformance upgrades directly replace those plain OE factory rotors ...
STILLEN Sport Rotors - Pillar Vane
These direct replacement one and two piece rotors where available are a race proven performance upgrade that deliver improved stopping and fade resistance over the factory rotorsThe two piece design r ...
StopTech Premium Rotors
Dont be fooled by inferior products that claim to be premium StopTech Premium Rotors feature Original Equipment specifications and production processes These StopTech Rotors are manufactured to meet Q ...
StopTech SportStop Rotors - Drilled
SportStop onepiece direct replacement rotors fit stock calipers Drilling or slotting helps wipe away the debris that forms between the pad and the disc adds more bite and can help the rear brakes to m ..
StopTech SportStop Rotors - Drilled & Slotted
SportStop onepiece direct replacement rotors fit stock calipers Drilling or slotting helps wipe away the debris that forms between the pad and the disc adds more bite and can help the rear brakes to m ..
making the most stopping power. That theory is correct up to a certain extent and there is a simple way to see where it fails. To start off, pretend that the brake pad is the concrete on the street and the rotor is the tire. Since a stock rotor is being used, the tire would be a slick tire with no thread just smooth rubber. Now the driver revs up, lets off the clutch, the tire does a burnout and takes off fast. Since the tire is slick and has full contact with the road, it grips better than a tire with spaces in between the thread, like a slotted and drilled rotor. This sounds good, but the difference is that the hotter a tire gets, the more it grips, but the hotter brakes get the less they grip. So when you first step on the brakes it stops hard, but shortly after you get what they call “brake fade” and can’t stop due to overheated brakes. Another way it fails is adding realistic elements such as water, dust, or debris in between the two surfaces which will make it even harder for friction to do its job. Once knowing that the stock rotors need to go, its time to see how drilled and slotted rotors help you stop.

Drilled RotorsStop Tech offers drilled rotors that have holes drilled in the rotor which are evenly spaced out and at an angle. There are a few advantages to this kind of rotor which benefit stopping efficiency. The first is the most obvious which is weight. The drilled out holes make the rotor lighter due to less material which is beneficial to axle weight. Wet stopping power is another benefit of drilled rotors. When driving in the rain water is splashing all over the brakes, if the water gets in between the pad and rotor it makes it harder to make contact and stop. The holes in the drilled rotor allow the water to quickly escape and let the surfaces grip without interference. The holes also allow a little more venting than a regular rotor which cools them better resulting in less brake fade. This will allow for consistent braking. One insignificant plus to drilled rotors are their actual appearance. Drilled rotors look much sportier and attractive than stock rotors. The negative of having this type of rotor is that it is not as strong as a regular rotor. The holes weaken the structure and can possibly make pressure cracks in between them. On cheap rotors this can be expected, although Stop Tech’s top of the line rotors are built strong to endure hard braking and overall use.

Slotted RotorsSlotted rotors are similar to drilled, but have engraved lines that go horizontally around the rotor hat. The great thing about slotted rotors is that they are stronger than the drilled rotors due to no holes weakening the structure, which makes a lot of people feel safer. When the pad squeezes the rotor and starts to slide against it, not only does heat start to form but so does dust and gas. When this dust and gas forms, they make it harder for the pad to continuously create good stopping power. The slots solve this problem as they squeegee the pad every time it crosses the slot cleaning away any dust and gas that gets trapped in between creating better contact resulting in better stopping. Although the slots help with gas and dust, they are not big enough to improve stopping power during rain as much as the drilled rotors.

Drilled & Slotted RotorsThere is also a combination of both slotted and drilled holes in a single rotor. Drilled and slotted rotors have the benefits of both kinds of rotors although this results in even less surface contact between the pad and the rotor due to so much material being taken away. This doesn’t make them bad rotors it just gives you more options to choose from depending on what you’re looking for in a rotor. First of all they look the best making your car have great aesthetics. They have all the benefits of light weight, lower temperature, water resistance, cleaning the pad, letting gases escape and so on. These types of rotors, to many people, may be the best kind which I would agree with. However, they will also the first to fail before the slotted or stock. So, it is important to choose the type of rotor that will be the best for you. Even though this type of rotor will have least contact with the pad, to many the benefits outweigh the negatives.

The draw back to slotted, drilled, and both combined is that you cannot cut or resurface them. The slots or holes will not allow a machine to evenly cut due to the spaces. Most people won’t see a difference other than the looks if used on the street. For the common person doing daily driving, normal rotors would make the most sense to purchase. However, if your car will be seeing the track or high performance driving, slotted, drilled, or a combination would make sense for you to purchase.


The options are out there, and many different companies make great quality rotors and now you know which one is right for you. If you have more questions about which rotor and brake combination would be the best for you, send an email to: This e-mail address is being protected from spambots. You need JavaScript enabled to view it



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