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      07-29-2016, 06:05 PM   #1
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► APEX | ARC-8 Light Weight Track Wheels



APEX ARC-8 Wheels

We are proud to continue offering our timeless ARC-8 wheel. This new wheel addresses the concerns of more and more racers and track day enthusiasts: long term durability, fitment, and performance. With the increase of faster and heavier cars being used in racing, HPDEs, and spirited driving, the ARC-8 was designed and engineered to handle extreme abuse on track and street, offer a wide range of direct fitments, while still producing a lightweight wheel.

Visit our website to order

The Good Stuff




1. They Fit Everything
The ARC-8's wide range of widths, diameters, offsets and face profiles result in 26 unique BMW fitments ranging from 8.5" to 10.5" wide. Each wheel combines these features to meet the different brake caliper, strut, and fender clearance needs of each BMW model.

2. Factory Support
Like all our APEX wheels, The ARC-8 supports all OEM hardware like OEM Roundel center caps, wheel lugs, valve stems, and TPMS sensors. No centering rings are needed either, as all of our 5x120 BMW wheels use a 72.56mm center bore.

3. Brake Clearance
ARC-8 wheels properly clear all OEM brake calipers. Our wheels are targeted at the serious performance-minded owner. The spokes of the flatter faced ARC-8 were designed to clear big brake kits, making it a better choice for BBK equipped cars. The concave version of the wheel is the best option for cars with factory brake calipers.

4. Concavity
The ARC-8 wheel is available in two unique face profiles. The shallower face provides increased caliper clearance on narrow applications, while the deeper concave face reduces weight and creates a stunningly aggressive appearance on low offset and wide width applications. These two face profiles are available in all 17", 18" and 19" diameters.

Designed for the Performance Enthusiast

Light-weight
Flow-forming allows for a significant reduction in rotational mass by reducing barrel weight. This manufacturing technique allows our wheels to be almost as light as a traditional forged wheel, but without the significant increase in price.

Strength
Track duty requires a wheel that can handle the punishment of high lateral G’s, hitting berms, and every once in a while, a small off track excursion. Spoke and barrel design are a major factor in wheel strength. The flow-forming technique uses high pressure disks/rollers to roll the wheel’s barrel into its final shape. This gives the barrel the same strength properties as a forged wheel, since monoblock wheels go through a similar step to form their barrels. We design our spoke dimensions to help evenly distribute loads from the barrel to the center of the wheel. The lack of a front lip, and spokes directly connecting to the edge of the wheel, also add increased strength to the outer lip of the wheel.

Chassis-Specific Fitments
Stretched rubber, narrow tires, and fender rubbing are not elements to look for in a competitive wheel/tire setup. All of our wheels were designed with offsets that allow for proper fitment of extreme summer, and r-compound tires without the need for spacers or fender rolling. This means keeping the tire under the fender, and away from suspension components. Track oriented wheel widths are also important as they provide proper sidewall support under hard cornering. Too much rubber for a wheel results in excessive sidewall deflection, which translates into sloppy and delayed turning response.

Multiple Fitment Options
Most BMWs come with a staggered setup from the factory. Some choose to keep their car this way, while others like to switch out for an easy-to-rotate, square/neutral setup. This is generally based on driver’s preference and consideration of tire costs. Most BMW chassis benefit from being able to fit both square and staggered setups with relative ease. 9.5” or 10”-wide square setups are great for budget minded enthusiasts who want to extend their tires life by rotating between events, in addition to preferring the feel of a square setup. Square setups are popular on all models for track use due to the significant increase in front grip and turn-in response. Some owners comment that due to the extra power of their cars, a square setup will lean towards oversteer. For those who prefer more rubber in the rear, a staggered setup is the way to go. Wheels up to 10.5" wide are available for rear fitment. These can be combined with 9” or 9.5” fronts for a bolt-on spacer-free staggered setup.

Open-Hub Center
Race wheels can't just be light, they need to function in a high performance environment. Unlike the narrow lug recesses of most other wheels, the ARC-8 wheel boasts a completely wide-open design that easily fits over-sized race lugs and beefy impact sockets. This allows for quick and easy wheel changes at the track, and as a bonus prevents chips and scratches from tools for those just running these wheels on the street.


The APEX Standard



1. FEA Optimization
Various design features were implemented to ensure that the ARC-8 wheel design was as light and durable as possible. We began with a strong one-piece design featuring an open hub center and reliefs in the mounting pad to remove weight between lug holes. The design was then run through Finite Element Analysis (FEA) to further optimize the spoke and barrel design. The result is a light weight wheel with extra strength in all the right places, while keeping weight to a minimum.

2. Always Flow Formed
All APEX wheels feature Flow-Formed construction tha utilizes rotary forging to produce a strong and lightweight barrel. The ARC-8 is no exception.

3. True JWL & VIA Certification
Strength needs to be certified. Our wheels were not simply FEA tested in a computer simulation, or in-house tested to an unregulated standard. We conduct real-world crush-testing and all of our wheels conform to Japan’s JWL standard, as well as being 3rd-party tested by the VIA. All of our wheels carry a 690KG load rating.


Available Finishes


Note: Not all sizes are available in all finishes.

Face Profiles



Sizes, Weights, and Pricing


17" Sizes
18" Sizes
19" Sizes

Questions about tires, fenders, brakes, spacers, or suspension clearances?
Click here to get a personalized fitment recommendation from one of our experts.



On-Car Photos



Shown above: E46 M3 with 18x9.5 ET35 and 18x10.5 ET27 with 245/40/18 and 275/35/18 tires.


Shown above: E90 M3 with 17x10 ET25 with 275/40/17 tires all around.


Shown above: E92 M3 with 18x10.5 ET27 with 285/30/18 tires all around.

Check out our extensive collection of photos on our Flickr page. See more ARC-8 photos >>>

Tire Mounting and Balancing Service




Popular street and track tires are now available when you order APEX wheels. Add tires with your wheel order and get free tire mounting and balancing by our trusted enthusiast technicians. We use high-end, touchless equipment and inspect every wheel and tire combo thoroughly before they leave our warehouse. With our competitive tire pricing bundled with the savings of free mounting and balancing and convenience, it’s the ultimate wheel & tire package.

*Note: Tires will only ship mounted to the wheels in your order, and can not be sold separately. Tires and wheels must be purchased in the same transaction. Tire-only orders will be cancelled and refunded.

Available Tire Brands:

Ordering and Contact Information
  • Hours: Monday - Friday, 9AM to 6PM PST
  • Shipping: All orders are shipped directly from us via UPS. Local pickup also available at our Livermore, CA Warehouse. (Map It)

Last edited by Expert@ApexRaceParts; 09-29-2017 at 07:17 PM.
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      08-08-2016, 10:37 AM   #2
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Quote:
Originally Posted by Expert@ApexRaceParts View Post
ARC-8's are in stock for your Z4 in multiple fitments allowing you to use a variety of tire sizes depending on your intended uses and modifications installed on your car.



Please call, email, or pm us with any questions you may have.


What are the specs on this wheel/tire setup?
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      08-08-2016, 06:58 PM   #3
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Quote:
Originally Posted by Xpuzzle View Post
What are the specs on this wheel/tire setup?
I believe that Z4M is running the following fitment:

F: 18x8.5" ET38 (Profile 1) - 235/40-18
R: 18x9.5 et22 (Profile 3) - 275/35-18

Here is another shot from the rear:


-Matt
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      08-09-2016, 11:07 AM   #4
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Thanks Matt.

Will this work for Z4 35i with adaptive suspension and lowered on Eibach?

Front: ARC-8 18x9 et30 profile 3 - 235/40-18
Rear: ARC-8 18x9.5 et22 profile 3 - 265/35-18
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      08-15-2016, 06:55 PM   #5
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Quote:
Originally Posted by Xpuzzle View Post
Thanks Matt.

Will this work for Z4 35i with adaptive suspension and lowered on Eibach?

Front: ARC-8 18x9 et30 profile 3 - 235/40-18
Rear: ARC-8 18x9.5 et22 profile 3 - 265/35-18

I would suggest going with 18x9.5 et35 profile 3 - 265/35-18 since the ET22 will be very aggressive for the rear. Typically the ET35's will be a direct fit. With that said, if you are is very low, you may still need to roll you fenders in order to fit 265/35-18's.
-Matt
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      04-11-2017, 06:50 PM   #6
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Feel free to contact us with any questions regarding fitment or availability.

Last edited by Expert@ApexRaceParts; 08-21-2017 at 07:22 PM.
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      04-19-2017, 07:15 PM   #7
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For more information on pricing and fitment, give us a call!
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      06-01-2017, 02:38 PM   #8
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ARC-8's are in stock for your Z4's in multiple staggered and square fitments for your street, track, or dual duty car!



Please call, pm, or email us with any questions you may have.
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      07-10-2017, 07:25 PM   #9
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We have many sizes finishes of the ARC-8's in Z fitment in stock right now.

Last edited by Expert@ApexRaceParts; 08-09-2017 at 04:11 PM.
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      07-26-2017, 06:15 PM   #10
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Black & white.

Front: 18x9.5" ET35 ARC-8 in the Satin Black finish with a 255/35/18 tire.

Rear: 18x10" ET25 ARC-8 in the Satin Black finish with a 265/35/18 tire.

(5MM Spacer was added to the rear)

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      07-31-2017, 06:27 PM   #11
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Low clearance? No problem.

These 18" Satin Black ARC-8s slide right over massive StopTech brakes.

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      08-09-2017, 04:11 PM   #12
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Let us know if you have any questions about sizing or brake/suspension clearance.

Last edited by Expert@ApexRaceParts; 08-14-2017 at 06:49 PM.
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      08-14-2017, 06:49 PM   #13
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Satin Black ARC-8s on this Z4M Roadster:

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      08-31-2017, 03:09 PM   #14
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Feel free to contact us with any questions regarding fitment or availability.
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      12-11-2017, 04:37 PM   #15
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TIRES NOW AVAILABLE
  • Michelin Pilot Super Sport
  • Michelin Pilot Sport 4S
  • BF Goodrich g-Force Rival S
  • BF Goodrich g-Force Rival S 1.5
  • BF Goodrich g-Force R1S
View Complete Tire Selection

Add tires to your ARC-8 wheels with free in-house professional mounting, balancing, and quality control inspection. Check out our tire selection and feel free to contact us for a recommendation.

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      03-19-2018, 07:15 PM   #16
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Strong, light, affordable. Choose three.

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      05-17-2018, 05:32 PM   #17
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Now available due to popular demand, red APEX centercaps! Use this link to check them out and place a pre-order.

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      10-17-2018, 05:56 PM   #18
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Another shot of the Z4 from above:

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