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      10-18-2012, 04:07 PM   #1
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► APEX | ARC-8 Light Weight Track Wheels

APEX ARC-8 Wheels

APEX ARC-8 wheels were designed to meet the specification needs of HPDE, race, and autocross drivers, while exceeding the requirements for every day street use. This makes them the perfect cost effective, dual duty wheel.


APEX ARC-8 in Hyper Silver


Meeting the Performance Enthusiast’s requirements:
Light-weight: Flow-forming allows for a significant reduction in rotational mass by reducing barrel weight. This manufacturing technique allows the ARC-8 wheel 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. The ARC-8's mesh design helps 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. Although a front lip can reduce weight, it can also make the wheel much more prone to bending, and this was an important factor when developing the wheel.

Once a design is selected, it needs to be tested and certified for strength. The ARC-8 wheels were not just FEA tested in a computer simulation, or in house tested to an unregulated standard. They follow Japans JWL standard, and are 3rd party tested there by the VIA in Japan. All 18" ARC-8 wheels have a 690KG load rating.

Proper tire fitment: Stretched rubber, narrow tires, and fender rubbing are not elements to look for in a competitive wheel/tire setup. The ARC-8 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 fitments: Most BMW’s come with a staggered setup. 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 in addition to costs. The E46 M3 benefits from being able to fit both square and staggered setups with relative ease. 9.5” or 10” 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 3 series models for track use due to the significant increase in front grip and turn in response. Some E46 M3 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. 10” and 10.5” wheels are available for rear fitment. These can be combined with 9.5” or 10” fronts for a bolt-on spacer free staggered setup.

BBK clearance: Many owners install Big Brake kits on their cars. Having an 18” wheel that can clear large calipers is a must. Due to the low offset nature of the E46 M3, there are no clearance issues with the concave spokes of the ARC-8 wheel. Barrel clearance was increased during the design phase to accommodate StopTech’s 380mm kit. The only kit that poses an issue at this time is the 380mm Brembo setup.


Meeting the needs of Daily/Street use:

Aesthetic design: Although the ARC-8 put function over form when meeting the above requirements, there is no denying that concave mesh wheels look at home on a BMW.

Paint finishes: All the wheel have a multi-coat painted finish including a full clear coat except for the Satin finish which does not have a clear (that would have made it gloss black). To give owners more options the wheels are offered in 4 different finishes. Hyper Silver, Hyper Black, Anthracite, and Satin Black. Not everyone wants their track day wheels to be grey.

Abuse of street use: The world is full of pot holes and random things to run over. APEX wheels have an excellent history of handling abuse. To date we’ve only had one wheel with a minor bend and another with a hair line crack on the inner barrel lip. Both these wheels came from the same dedicated race car, and the bent wheel is still out there racing today.

Multiple fitments: Due to the more conservative nature of street use, the ARC-8 wheel is also available in sizes that can fit more street oriented rubber, at offsets that are an easier fit. Wider more aggressive wheels can be used by those who like a more flush/filled out look. The choice is yours.

Certification: The race track has no wheel strength requirements, but the street does. Sadly the USA has very lenient/minimal regulations of wheel strength, unlike like Japan and Germany. APEX wheels are independently tested by the Vehicle Inspection Association of Japan (VIA) to the JWL standard. Wheels tested to the JWL standard require all wheels on the road to meet specific load rating requirements based on the bolt pattern, and dimensions of the wheel, the application/vehicle model has nothing to do with it. In comparison, wheels tested to the SAE standard in the USA can pick their own load rating, which can be as low as they want. This defeats the purpose of the test, as a wheel manufacturer can choose to underrate their wheels in order to reduce wheel weight. Wheels claiming JWL testing, but no 3rd party verification are prone to certifying untested/unproven wheels. VIA certification can not be done in house. It requires sending wheels/tires to japan for crush testing. Sadly a large number of vendors claim their wheels are VIA, JWL and even TUV certified, when in fact they were never tested by those organizations at all, and in some cases don't even meet the standard requirements of those tests. For this reason the certificate numbers for the ARC-8 wheels have been listed below. Self regulate the market, and ask all vendors to back up their claims. If they were tested, then they'll have the registration numbers.


Available Sizes, Weights, and Pricing:
17x8.5" ET20 - 16.50lbs - $259
17x8.5" ET40 - 17.20lbs - $249
17x9.0" ET30 - 16.50lbs - $264
17x9.0" ET42 - 17.20lbs - $259
17x9.5" ET35 - 16.95lbs - $269
17x10" ET25 - 18.45lbs - $284 - E9X M3 Fitment
17x10.5" ET27 - 18.95lbs - $299 - E9X M3 Fitment
18x8.5" ET38 - 18.45lbs - $289
18x8.5" ET45 - 18.20lbs - $289
18x9.0" ET42 - 18.65lbs - $299
18x9.5" ET62 - 18.20lbs - $314
18x9.5" ET35 - 18.85lbs - $314
18x9.5" ET22 - 19.20lbs - $314 - E9X M3 Fitment
18x10" ET25 - 19.95lbs - $324 - E9X M3 Fitment
18x10.5" ET27 - 20.45lbs - $344 - E9X M3 Fitment

Available Finishes
  • Hyper Silver
  • Hyper Black
  • Anthracite
  • Satin Black

Warranty Summary:
2 year Structural, 1 year limited finish warranty guarantees wheels will be free from defects in materials, workmanship and paint finish under normal and reasonable use.





Please click the images for a higher resolution version.

Ordering and Contact
  • Phone: Call (888) 499-9135 EXT. #1 for phone orders.
  • Payment: Credit and Debit Cards: Visa, Mastercard, AMEX, Discover, PayPal. Bank Wire Transfers are also available. Contact us to use a wire transfer for payment on your order.
  • Tax: California customers will be charged 8.75% CA sales tax.
  • Shipping: APEX ships all orders with UPS.
  • APEX Hours:
    Monday thru Friday: 9AM to 6PM PST
    Saturday and Sunday: Closed
  • Warehouse and local pickup: The APEX warehouse is at 7888 Marathon Drive, Unit A, Livermore, CA, 94550 (Map It), (888) 499-9135 EXT. #2. This is where you pick up local orders.
  • Service and Installation: Apex Performance Services - Dublin: 6443 Golden Gate Drive, Dublin, CA 94568 (Map It), (888) 499-9135 EXT. #3
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      10-31-2012, 03:53 AM   #2
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Would these ever end up as 19" wheels?
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      10-31-2012, 12:22 PM   #3
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Quote:
Originally Posted by Tomislav View Post
Would these ever end up as 19" wheels?
We are working on that, hopefully we will have them this coming year
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      11-14-2012, 12:47 AM   #4
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Group buy?
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      11-14-2012, 02:49 PM   #5
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I can't give out much information yet but keep an eye out on our Facebook, website, and the forum for an upcoming special very soon
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      06-18-2013, 04:34 PM   #6
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Send a message via AIM to Sal@AUTOcouture
very nice!
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      06-18-2013, 04:36 PM   #7
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Here are some pics from our latest build:

Specs:
Hyper Black 18x9.5 ET22 front
Hyper Black 18x10.5 ET27 rear








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      06-19-2013, 11:14 PM   #8
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How do these wheels hold up as daily driver wheels with occasional track usage?

Just curious if you've seen much issue with bending from potholes and rough roads.

I'm pretty careful with my wheels, but the roads around here seem to keep getting worse and worse.
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      06-20-2013, 05:49 PM   #9
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Thank you for the photos Sal@AUTOcouture Great looking project!

Quote:
Originally Posted by wheatpaste View Post
How do these wheels hold up as daily driver wheels with occasional track usage?

Just curious if you've seen much issue with bending from potholes and rough roads.

I'm pretty careful with my wheels, but the roads around here seem to keep getting worse and worse.
We've had plenty of customers use our wheels for both street and track use, even those that use them strictly for track or race use. We have not had any issues with them used for either purposes, and many of our customers have been extremely happy with the performance provided by our ARC-8 wheels on the track, while helping them slightly increase gas mileage for daily use. With the proper tire sizes used with our wheels, you should have proper wheel protection from most potholes.
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      06-21-2013, 11:51 AM   #10
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So the 18 x 10 ET25 will fit an stock ZCP E92 M3 (all 4 corners) without any spacers or modification needed? Also are the wheels hubcentric (do not require hubcentric rings)?
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      06-21-2013, 11:59 AM   #11
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Quote:
Originally Posted by 03///m3 View Post
So the 18 x 10 ET25 will fit an stock ZCP E92 M3 (all 4 corners) without any spacers or modification needed? Also are the wheels hubcentric (do not require hubcentric rings)?
The e9x M3 with OEM suspension can utilize the 18x10" ET25 ARC-8 with 275/35/18 street tires without the need of any spacers. If you are using an extreme summer tire, such as a Hankook RS3 or Dunlop DZII, you may have slight rubbing on the fender liner at full lock. The wheels are hubcentric so you will not need any hubcentric rings. Let us know if you have any other questions!
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      06-21-2013, 12:02 PM   #12
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Quote:
Originally Posted by David@ApexRaceParts View Post
The e9x M3 with OEM suspension can utilize the 18x10" ET25 ARC-8 with 275/35/18 street tires without the need of any spacers. If you are using an extreme summer tire, such as a Hankook RS3 or Dunlop DZII, you may have slight rubbing on the fender liner at full lock. The wheels are hubcentric so you will not need any hubcentric rings. Let us know if you have any other questions!
OK. I would most likely using RS3's. So i should opt for the 9.5 width front wheels for absolutely no rubbing?
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      06-25-2013, 05:54 PM   #13
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Quote:
Originally Posted by 03///m3 View Post
OK. I would most likely using RS3's. So i should opt for the 9.5 width front wheels for absolutely no rubbing?
Yes, the 18x9.5" ET22 ARC-8's shouldn't rub even at full lock with 275/35/18 Hankook R-S3's because the 9.5" wheel will allow for 3mm more clearance on the outer edge of the rim and 9mm more clearance on the inner edge of the rim.
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Last edited by ApexRaceParts; 05-06-2014 at 04:15 PM.
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      06-30-2013, 11:14 AM   #14
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GB

Any group buys?
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      07-01-2013, 12:12 PM   #15
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Quote:
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Any group buys?
We are not currently hosting any group buys, and do not have any plans for one in the near future. There may be one at the start of the new year, but we have not decided on what would be included.
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      07-06-2013, 12:04 AM   #16
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Quote:
Originally Posted by David@ApexRaceParts View Post
The e9x M3 with OEM suspension can utilize the 18x10" ET25 ARC-8 with 275/35/18 street tires without the need of any spacers. If you are using an extreme summer tire, such as a Hankook RS3 or Dunlop DZII, you may have slight rubbing on the fender liner at full lock. The wheels are hubcentric so you will not need any hubcentric rings. Let us know if you have any other questions!
I have this setup with the ZII's. no rubbing whatsoever.
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      07-08-2013, 04:54 PM   #17
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Quote:
Originally Posted by MRM55 View Post
I have this setup with the ZII's. no rubbing whatsoever.
Thanks for the input, its great to hear you aren't having any issues with the Dunlops!
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Last edited by ApexRaceParts; 10-22-2014 at 02:29 PM.
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      07-23-2013, 04:15 PM   #18
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Quote:
Originally Posted by ApexRaceParts View Post
Concave 17" ARC-8's are in stock now!
What width do you recommend, the 10" or 10.5? What is the max amount of tire (squared) could I get on the 17" for autocross use only.

Thanks!
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      07-23-2013, 05:46 PM   #19
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Quote:
Originally Posted by Millie View Post
What width do you recommend, the 10" or 10.5? What is the max amount of tire (squared) could I get on the 17" for autocross use only.

Thanks!
We would recommend the 17x10" ET25 with 275/40/17 tires. This car is running 275/40/17 Toyo R888's which are very meaty. No camber plates are required to run these wheels and tires, and no spacers are needed either.



You could potentially run the 17x10.5" wheels all around but it is a very difficult fit for the front. The 17" wheels sit much closer to the strut tube, so a thick spacer will be required. Additionally, camber plates will likely need to be maxed out to prevent rubbing on the fender. We do not recommend this setup, but it is possible with the correct amount of work put into the setup.

Feel free to ask us anything else you might have questions about!
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Last edited by ApexRaceParts; 07-23-2013 at 06:43 PM.
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      07-23-2013, 06:27 PM   #20
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Quote:
Originally Posted by ApexRaceParts View Post
We would recommend the 17x10" ET25 with 275/35/18 tires.
Don't you mean 275/40/17 tires? I don't think 275/35/18 would fit on 17" wheels.

You ship to Canada?
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      07-24-2013, 01:00 PM   #21
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Quote:
Originally Posted by Millie View Post
Don't you mean 275/40/17 tires? I don't think 275/35/18 would fit on 17" wheels.

You ship to Canada?
Good catch fixed! Yes we can ship to Canada via UPS Standard International.
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      08-27-2013, 06:05 PM   #22
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when will the next group buy be
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