Technical Articles and Reviews on Cor Wheels forged and fitted fitment custom rims.

Statement From COR Wheels

Due to some unfortunate circumstances regarding a set of COR forged wheels, we feel that it is necessary to publicly address the situation and reiterate our company’s commitment to quality and customer service that has helped us build a strong reputation within the industry.

We are sure that many of you feel this response is long overdue, but given the sensitive nature and legalities involved, we had no alternative but to proceed with care, so as not to inflame an already volatile situation. Until this time, we have had nothing but excellent feedback and reviews from our clients concerning our products and service. In relation to the number of wheels that we have produced, our warranty adjustments have been less than one tenth of one-percent, which is a superb standard for any manufactured product. This is due in no small part to our commitment to building long lasting relationships with our distributors and returning customer base whose support is well recognized and very much appreciated.

The isolated incident that occurred with one of our clients was very unfortunate and unforeseeable, and we are thankful that there were no injuries. The product involved was designed, developed and third-party tested to ensure its integrity, strength, and reliability. The safety of our customers is extremely important to us, and is not a matter taken lightly by any member of our organization.

It is customary–and our preference–to service our customers directly. The client elected to bypass our resolution process by communicating with us through third parties (specifically an attorney). We sincerely hope that those following this series of events can appreciate that we had no other option than to turn this matter over to our product liability carrier, which exists specifically to address situations such as this. To be clear, the claim for warranty denied on the published letter was a response to the client’s attorney’s demand letter, and not COR Wheels refusing to stand behind its product. Prior to the involvement of legal counsel, the client was offered a full refund, regardless of any specific warranty considerations. We would like to clarify that the revisions made to our warranty were a direct result of the client’s attorney’s assertion that our terminology was vague. This does not speak of the safety and appropriateness of the product, which we feel is 100-percent safe for use on or off the track, but rather to the applicability of our warranty. With this revision, our warranty policy is more in-line with industry norms, which even at the OEM level precludes the use in a track environment.

As a final thought, we at COR wheels want to reiterate our commitment to the performance aftermarket and help further everyone’s understanding of the process and technology behind automotive wheels. We have a standing invitation for any interested party or any member of the media to visit our headquarters in Florida, tour our facilities, and meet the individuals responsible for designing, creating, and manufacturing the products that we are so very proud to offer. We sincerely hope that you will avail yourselves of this offer so that you may observe first-hand, our manufacturing and quality control process and the effort that goes into each and every product that leaves our facility.


Christopher Robles & Robert Herrera
Founders & Owners
COR International, LLC
2799 NW 82nd Avenue

Miami, Florida 33122
Phone: 305.477.5850
Fax: 786.427.1324

Wheel Finishes

Standard finishes for center section include Brilliant Silver, Piano Black, Matte Black, and brushed aluminum with a high gloss clear. Outers are offered in a choice of chrome or high polished aluminum. All components can be custom ordered in virtually any custom paint or carbon fiber finish.


Ferrari California on 21F 22R F1-Brava monobloc

3 Piece Wheel Maintenance & Leak Detection


In every day street use, three-piece wheels will provide years of service and require no special maintenance other than standard tire care and valve core replacement at tire change intervals. If you use your wheels for competitions and racing, it is recommended that both 1-piece and 3-piece modular wheels undergo inspection at the end of each season. For monobloc wheels, a thorough cleaning and visual inspection for any signs of stress cracks or fatigue as well as runout checks would be sufficient. If the wheels have undergone any type of impact damage and remained intact, it is strongly recommended that they are x-ray tested or have their finish stripped and undergo a dye penetrant test. The former is the most preferred, but if your preparation for a new season involves refinishing the wheels, the latter may be more practical since the finish will be removed anyway.

Three piece modular wheels require the same periodic maintenance as described above for monobloc wheels. Additionally, since racing involves frequent tire mounting and dismounting, it is also advisable to disassemble, thoroughly inspect, clean, re-seal, and re-torque each wheel.

  • Whenever you disassemble the wheels, it is also necessary that you replace the bolt and nut, and make sure that they are correctly torqued.
  • Proper torque on an 8mm blind bolt is 15 ft/lbs, whereas through bolts with nuts are recommended at 28-30 ft/lbs.
  • Clean the surfaces where the wheel and tire meet with a proper cleaner then apply a skim coat of silicone sealant to the two surfaces, reassemble the wheel, mount, and secure the bolts to the proper torque specifications.
  • Replace the old valve stem with a new unit and install.
  • At the drop center area of the wheel apply a thick layer of silicone sealant and allow it to set and harden for at least 24 hours before the wheel is mounted.

Leak Detection

In the event you come across an issue where you’re losing air, below are some methods to further test where the leak is coming from.

  • Inflate the tire to 40 psi, even if it is above the recommended tire pressure.
  • Mix together soap and water then spray or pour it onto the wheel and tire.
  • Take a tire crayon and highlight where the bubbles form on the tire/wheel.
  • If the bubbles indicate a leak in the wheel or tire, you can reseal the wheel by using the maintenance procedure listed above.

The most popular cause for leaking wheels:

  • Damage to silicone during tire servicing. Being that 3 piece wheels can be a challenge to mount tires on, tire techs must use a tire spoon (in some cases two) in able to manipulate the tire onto the wheel. In the process of handling the tire, the tire spoons come into contact with the barrel of the wheel and if done without extra care, the spoons can come in contact with the silicone causing the silicone to lose its retention and later leak.
  • Use of liquid tire repair agent (fix-a-flat or other). In the unfortunate event of a flat tire, some will resort to a quick fix using a liquid tire repair. The harsh chemicals in these agents can cause two things that will later lead to leaks: 1. The silicone will be damaged with the harsh chemicals causing the wheels to later leak. 2. Some liquids are so harsh that they’ll eat the chrome from the barrels (if chromed) where the tire bead meets the barrel and cause air to escape.

The Benefits of Powder Coating

Powder coating is one of the most durable surface finishes in use today. It is used across a wide array of industries including Aviation, marine, and military applications. The process involves the application of the dry paint or “powder”, which has the look and feel of crumbled plastic, to a part instead of the traditional liquid suspension paint that is traditionally used. There are many benefits to applying a powder coated finish compared to the standard liquid paint finish.

[Sun Burst Gold powder]

Before the powder coating process begins all components are deburred, sandblasted, hand sanded to ensure a smooth a finish, and provide an ideal surface for which the final finish to adhere. All parts are then cleaned and prepared with alcohol to remove any dirt, oil, and/or grease that may remain from the production process. These prepared components are then taken to a special painting booth where the components are electrically grounded. Using an electrostatic paint gun, the powder is sprayed with a positive write my essay electric charge, causing the grounded wheel to attract particles and provide for a smooth even coating.

[Inner Barrels being finished Gloss Black]

After the components receives a coat of electrostatic paint; they are taken to an oven for curing. Inside the oven, the powder is heated to a very controlled temperature and the powder melts to form a uniform coating.

The process is completed after the components are allowed to cool down and the coating hardens.

The environment in which a wheel operates is quite harsh and unforgiving. The powder coating process gives it many benefits over traditional liquid paint. Powder coating strengths are its durability and resistance to chipping, corrosion, and flaking that can result from rocks, stones, and other road debris. Powder coating also tends to last longer than liquid paint due to its thicker coating. In some of the more complex designs of forged wheels; areas that are not easily reached, such as deep lug holes, can be covered easily with powder coating thanks to the electrostatic delivery of the media. Additionally, powder coating is viewed as a more environmentally friendly process and overspray powder can be recycled for future usage, virtually eliminating any waste.

It is no wonder that the vast majority of original equipment wheels are powder coated by all top manufacturers. While traditional liquid paint may not be as durable as powder coating, it does offer an enormous choice of finishes. Liquid paint also has the unique ability to allow a customer to have his wheels, or portions of it, custom color matched to his vehicle, an option difficult to achieve in powder.

At COR Wheels, all of our standard color finishes are produced in our own dedicated in-house powder coating booth to create a customized wheel finish to your specifications. Our system utilizes specially designed racking and proprietary methodology to apply the finish and ensure a high quality long lasting finish. In addition to powder coating, we also offer a wide range of custom tailored liquid paint finishes for our wheels.

[COR Encor finished in Sun Burst Gold Powder]

Terry Seibert, Director of the Forged Wheels Division at APP [Interview]

Recently, COR Wheels was able to sit down with Terry Seibert, Director of the Forged Wheels Division at Aluminum Precision Products. Based in Santa Ana, California, Aluminum Precision Products is one of the premier international forging suppliers, and provides COR Wheels with the most advanced forgings in the industry.

What are some of APP’s core values?
Our mission statement is that “Aluminum Precision Products is committed to steady, long term improvement of all our products and processes through defect prevention rather than detection.” Our goal is to be the world class quality supplier of choice in the forging industry.

How long has APP been in business?
We were established in 1965.

What are some of the biggest changes you’ve seen or experienced in the forging industry during the past ten years?
More exotic light weight alloys are being developed and tested. Multi-piece or segmented precision die designs are also becoming more prevalent. APP is one of the premiere forge houses in this part of the industry.

Where do you see the future of the forging industry in ten years?
Expansion of forgings used in aerospace will continue to increase. Plus, the automobile industry will grow exponentially as cars are mandated for higher and higher CAFÉ numbers; vehicles will need to be light weight in all areas large and small such as suspensions, pistons, con-rods, engine components, structural components, and of course, wheels. We have a very positive outlook for considerable growth in the future.


What are some future plans for APP?
APP will continue as outlined in our mission statement, as well as expand in currently supplied aerospace, automotive, military/defense, medical, scuba, and commercial industries by expansion of sales and further acquisitions of cohesive like-manufacturing facilities.

What differentiates your forgings from others?
Our expertise garnered from engineering design, the calculation of grain flow appropriate to the part to be forged, and use of appropriate tonnage from one of 58 forge presses for a specific forged part. With our in-house die shop capabilities, we also ensure the customer is getting the best forgings.

What automakers use your forgings as Original Equipment (OE)?
Automakers such as Ferrari, Lamborghini, Aston Martin, Mercedes-Benz AMG, Pagani, Ducati, Artega, Koenigsegg, Alfa Romeo, and Audi use our forgings as Original Equipment.

Where are your forgings developed?
All engineering design, forge die production, forging processes, and spinning are performed in Santa Ana, California USA.

Differentiate Rotary VS Conventional Forgings?
APP is now, and always has been, a proponent of conventional forgings versus rotary forging for a general reason; that being the fact that APP does not forge only “round” parts. Our process includes precision forging of a variety of shapes and complicated designs. Specifically, APP believes the correct grain flow and direction of the grain flow for strength is obtained via conventional hydraulic forging versus pushing metal in a circular motion to obtain a round shape.

Big Brake, Wheel Issues? COR Has A Solution

One of the big advantages that come with owning COR wheels is not just their strength, durability, and style, but their ability to improve overall vehicle performance. While COR wheels can help to reduce rotational mass, they can also provide the necessary space needed for brake upgrades.

Big brake upgrades are one of the most important modifications for performance cars. Although stock brakes provide enough stopping power for daily commuting, they are often unable to handle sustained high speed braking and hard driving during track days. Performance brake kits help to reduce or eliminate fade, increase heat dissipation, reduce weight, and improve pedal response for shorter braking distances, better safety, and faster lap times.

Although installing a big brake upgrade will provide a significant performance increase, they don’t always fit factory and cast aftermarket wheels. In order to accommodate the larger size of performance brake kits, aftermarket cast and factory wheels often require the installation of wheel spacers. However, when spacers are used, they can result in a significant modification of offset leading to additional strain being placed on wheel bearings and suspension components, often causing premature wear, failure and vibration issues.

COR wheels have been designed with the enthusiast in mind. All COR wheels can be custom built in accordance with vehicle and aftermarket brake kit specifications to accommodate upgraded brakes without the addition of spacers. Brake upgrades from manufacturers such as Brembo, Rotora, Stop Tech, Alliance, K Sport, MOV’IT, Power Slot, and others are able to be easily fitted with COR wheels. In addition, custom built COR wheels are hub centric and will not lead to premature wear on wheel bearings and suspension components which can result from the use of aftermarket spacers. The ability of COR wheels to accommodate brake upgrades allows you to create a striking fitment for your car and gain unmatched performance on and off the racetrack.

COR Wheels Fitted on Big Brake Setups:

Camaro w/ AP Racing brake upgrade on Precise wheels
[singlepic id=1796 w=614]
350Z w/ Rotora brake upgrade on Concord wheels
[singlepic id=1460 w=614]
Porsche 997 Twin Turbo w/ factory big brakes on Trident wheels
[singlepic id=1461 w=614]
Land Rover w/ Brembo brake upgrade on Lladro wheels
[singlepic id=1462 w=614]
Corvette ZO6 w/ factory big brakes on Trident wheels
[singlepic id=1463 w=614]
Ferrari 360 Modena w/ factory ceramic big brakes on Concord wheels
[singlepic id=1464 w=614]
Lamborghini Gallardo Twin Turbo w/ factory big brakes on Concord wheels
[singlepic id=1465 w=614]
Lexus SC400 w/ Brembo brake upgrade on Concord wheels
[singlepic id=1466 w=614]
Lexus GS350 w/ D2 Racing brake upgrade on F1 Mesh wheels
[singlepic id=1467 w=614]
Nissan GT-R w/ Brembo brake upgrade on Precise wheels
[singlepic id=1468 w=614]

Cast Wheels VS Forged Wheels, What’s the difference?

The terms “forged” and “cast” are often used to describe a set of wheels to indicate the process used to manufacture the wheel. In the wheel industry forging and casting are the two predominant types of processes used to manufacture wheels.

During the casting process molten aluminum is either poured or drawn using a vacuum into a mold, where it is formed into the desired wheel shape and allowed to cool. Once the wheel has cooled minor modifications such as drilling and trimming are made, allowing for quick and inexpensive production. While a cast wheel may be easier and less expensive to manufacture, the process of allowing the molten aluminum to solidify leads to porosity, which are essentially inconsistencies in the material structure that unaccounted for can lead to cracking, oxidation, pitting in the finishing, and a reduction in the wheel’s structural integrity. To counteract this deficiency, manufacturers are forced to design with larger tolerances which lead to heavier wheels in order to achieve the desired structural integrity.

In contrast to casting, a forged wheel begins as a solid piece of metal referred to as a “billet”. This billet is then subjected to heat and intense pressure, which compresses the material to form a raw forging. These raw forgings are “forged” into different profiles to allow for the creation of different wheel designs.

The raw forgings are then lathe turned and milled in-house using our CNC machines to form the final shape and application of the desired wheel.

Due to the immense pressure that the billet undergoes during the forging process, the metal is less porous compared to cast wheels and has an interlocking and aligned grain structure. Although this can only be viewed under a microscope, this structure results in improved strength, durability, and resistance to corrosion and oxidation. Due to the more consistent forging, the same structural integrity can be achieved using less material in a forged wheel versus a similarly designed cast wheel, this lighter weight translates into improved overall vehicle performance. Forged wheels are often made into traditional one-piece monobloc wheels, or due to their inherent strength to weight, they can be made into two- and three-piece variations to give manufactures enormous flexibility in creating custom offsets and widths that would not normally be available in a monobloc construction.

Although the forging process may be more time consuming and costly than cast wheels, they offer significant benefits to the consumer. COR and Axiom wheels are designed and machined in-house, which means we have extensive control over the manufacturing process ensuring the highest level of quality and craftsmanship. In general, our forged wheels offer a 10 to 15 percent reduction in weight compared to factory cast wheels with some examples achieving a 35 percent reduction in weight.*

So, if you’re looking to upgrade your set of factory cast wheels, our forged wheels will not only improve the look of your vehicle, but contribute to an increased level of performance by reducing unsprung weight, while providing unmatched strength, durability, and, of course, individual style.

* Please note the exact weight reduction will be dependent on the factory wheel style and the wheel being used for the upgrade.