ZPOST
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   ZPOST > Marketplace > Sponsors Classifieds
  TireRack

SUPPORT ZPOST BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER, THANKS!
Post Reply
 
Thread Tools Search this Thread
      10-18-2012, 04:24 PM   #1
ApexRaceParts
Colonel
883
Rep
2,415
Posts

Drives: M3
Join Date: Jun 2012
Location: Bay Area

iTrader: (2)

► APEX | ARC-8 Light Weight Track Wheels

Thanks for your interest in our ARC-8 wheels! This thread will no longer be updated, but the discussion continues on our combined Flow Formed wheel thread at: https://www.zpost.com/forums/showthr...5#post25582445

We hope to see you there!

Last edited by ApexRaceParts; 12-19-2019 at 11:12 AM..
Appreciate 0
      10-28-2013, 11:42 PM   #2
RedDotRacer
Private First Class
15
Rep
175
Posts

Drives: 07 Z4mc
Join Date: Dec 2011
Location: San Diego

iTrader: (1)

Anyone have a pic of these powder coated in white on an mc? I'm thinking about it..
Appreciate 0
      10-29-2013, 09:07 AM   #3
Beedub
Major General
United Kingdom
319
Rep
5,209
Posts

Drives: 2007 Z4 M roadster vt2-500
Join Date: Sep 2007
Location: UK

iTrader: (0)

z4m fitment can you check the AP bbk on the 17" rim in 9" width with et30 please..
heres the template...

http://www.apracing.com/Drawings/P16230.pdf
__________________
Pristine Bi-colour Ti /Bsm...z4m roadster Ess vt2-500....Perfection on wheels.
Appreciate 0
      10-29-2013, 04:03 PM   #4
Expert@ApexRaceParts
Brigadier General
Expert@ApexRaceParts's Avatar
1232
Rep
4,645
Posts

Drives: M3
Join Date: Jun 2012
Location: Bay Area

iTrader: (0)

Quote:
Originally Posted by RedDotRacer View Post
Anyone have a pic of these powder coated in white on an mc? I'm thinking about it..
We have not seen that yet, you would be the first!

Quote:
Originally Posted by Beedub View Post
z4m fitment can you check the AP bbk on the 17" rim in 9" width with et30 please..
heres the template...

http://www.apracing.com/Drawings/P16230.pdf
Not a problem, we will test it and will report our findings for you!
Appreciate 0
      10-30-2013, 03:08 PM   #5
Beedub
Major General
United Kingdom
319
Rep
5,209
Posts

Drives: 2007 Z4 M roadster vt2-500
Join Date: Sep 2007
Location: UK

iTrader: (0)

thankyou david.... if this can clear i will order :-) payday in 3 days!!
__________________
Pristine Bi-colour Ti /Bsm...z4m roadster Ess vt2-500....Perfection on wheels.
Appreciate 0
      11-09-2013, 12:57 PM   #6
Bandlu
New Member
1
Rep
18
Posts

Drives: Z4M coupe
Join Date: Apr 2012
Location: Malta

iTrader: (0)

Quote:
Originally Posted by David@ApexRaceParts View Post
Satin Black ARC-8s on this Z4M Roadster:



We have many sizes finishes of the ARC-8's in Z fitment in stock right now!

I really like how concave these wheels are. I have kw v3's on the highest ride height possible without camber plates. Would this setup fit on my car without any rubbing? I believe the car in the photo is running 18x9.5 et35 and 18x10 et 25 with -2.5 camber without camber plates. My car is driven daily.

Thanks
Appreciate 0
      11-11-2013, 06:54 PM   #7
Expert@ApexRaceParts
Brigadier General
Expert@ApexRaceParts's Avatar
1232
Rep
4,645
Posts

Drives: M3
Join Date: Jun 2012
Location: Bay Area

iTrader: (0)

Quote:
Originally Posted by Bandlu View Post
I really like how concave these wheels are. I have kw v3's on the highest ride height possible without camber plates. Would this setup fit on my car without any rubbing? I believe the car in the photo is running 18x9.5 et35 and 18x10 et 25 with -2.5 camber without camber plates. My car is driven daily.

Thanks
With the KW Variants/ ST Coilovers, using the 18x9.5" ET35 ARC-8 with a 255/35/18 tire, you would hit either the spring perch or the bottom of the spring itself with the V shaped springs, so you will need to add a small 5mm spacer, or perhaps even larger depending on your ride height, to push the tire out away from the spring perch or spring. With the added spacer, you will need to dial in additional negative camber for the wheels and tires to clear the fenders properly, probably more than -3 degrees. In order to fix this issue with the 18x9.5" ET35 wheel clearance, you would want to switch to a linear spring. Because of their shape, it is recommended to be used with camber plates. You may be able to source upper top hat that would work with the OEM upper mount.

Some people go with a stretched tire of a 245/40/18 on the front, but we do not believe this would be a good solution as it would not provide the proper wheel protection due to the tire stretch. The best solution is still to change the KW V-shaped springs to the 6" linear race springs for proper fitment. The KW spring perch accepts a 60mm spring, thus you should look for a 6" 60mm spring from Swift, Hyperco, Eibach, or H&R. This will allow you to remove your V shaped spring and raise the lower spring perch higher to avoid the wheels and tires interfering.
Appreciate 0
      11-12-2013, 11:55 PM   #8
Bandlu
New Member
1
Rep
18
Posts

Drives: Z4M coupe
Join Date: Apr 2012
Location: Malta

iTrader: (0)

Quote:
Originally Posted by David@ApexRaceParts View Post
With the KW Variants/ ST Coilovers, using the 18x9.5" ET35 ARC-8 with a 255/35/18 tire, you would hit either the spring perch or the bottom of the spring itself with the V shaped springs, so you will need to add a small 5mm spacer, or perhaps even larger depending on your ride height, to push the tire out away from the spring perch or spring. With the added spacer, you will need to dial in additional negative camber for the wheels and tires to clear the fenders properly, probably more than -3 degrees. In order to fix this issue with the 18x9.5" ET35 wheel clearance, you would want to switch to a linear spring. Because of their shape, it is recommended to be used with camber plates. You may be able to source upper top hat that would work with the OEM upper mount.

Some people go with a stretched tire of a 245/40/18 on the front, but we do not believe this would be a good solution as it would not provide the proper wheel protection due to the tire stretch. The best solution is still to change the KW V-shaped springs to the 6" linear race springs for proper fitment. The KW spring perch accepts a 60mm spring, thus you should look for a 6" 60mm spring from Swift, Hyperco, Eibach, or H&R. This will allow you to remove your V shaped spring and raise the lower spring perch higher to avoid the wheels and tires interfering.
Thanks for that David

I'm not really interested in changing my springs. Would the 18x8.5 et 38 and 18x9.5 et22 fit with my standard v3s and without need for camber plates? How much camber would I need? Would they still look as concave? What tyres would you normally run on these rims?

Thanks

Kerstien
Appreciate 0
      11-13-2013, 04:53 PM   #9
Expert@ApexRaceParts
Brigadier General
Expert@ApexRaceParts's Avatar
1232
Rep
4,645
Posts

Drives: M3
Join Date: Jun 2012
Location: Bay Area

iTrader: (0)

Quote:
Originally Posted by Bandlu View Post
Thanks for that David

I'm not really interested in changing my springs. Would the 18x8.5 et 38 and 18x9.5 et22 fit with my standard v3s and without need for camber plates? How much camber would I need? Would they still look as concave? What tyres would you normally run on these rims?

Thanks

Kerstien
Kerstein, the 18x8.5" ET38 and 18x9.5" ET22 will indeed work with your car with the KW V3's without the need of switching to a linear race spring or camber plates, as it would be compatible with the OEM alignment specifications. However, the 18x8.5" ET38 is a flat faced wheel, so you'd have a staggered look with a concave rear wheel. The street tire sizes that we usually recommend are 235/40/18 and 265/35/18. Some people have gotten away with 245/35/18 and 275/35/18 street tire sizes, but extreme performance summer tires, such as Hankook RS3's and Dunlop Direzza Star Specs, would require a fender roll in the rear to avoid rubbing, and some added negative camber in the front depending on your ride height.
Appreciate 0
      12-26-2013, 01:43 AM   #10
zubydafa
tosser
Isle of Man
18
Rep
988
Posts

Drives: '07 Z4MC
Join Date: Jul 2011
Location: Allentown, PA

iTrader: (0)

Quote:
Originally Posted by David@ApexRaceParts View Post
With the KW Variants/ ST Coilovers, using the 18x9.5" ET35 ARC-8 with a 255/35/18 tire, you would hit either the spring perch or the bottom of the spring itself with the V shaped springs, so you will need to add a small 5mm spacer, or perhaps even larger depending on your ride height, to push the tire out away from the spring perch or spring. With the added spacer, you will need to dial in additional negative camber for the wheels and tires to clear the fenders properly, probably more than -3 degrees. In order to fix this issue with the 18x9.5" ET35 wheel clearance, you would want to switch to a linear spring. Because of their shape, it is recommended to be used with camber plates. You may be able to source upper top hat that would work with the OEM upper mount.

Some people go with a stretched tire of a 245/40/18 on the front, but we do not believe this would be a good solution as it would not provide the proper wheel protection due to the tire stretch. The best solution is still to change the KW V-shaped springs to the 6" linear race springs for proper fitment. The KW spring perch accepts a 60mm spring, thus you should look for a 6" 60mm spring from Swift, Hyperco, Eibach, or H&R. This will allow you to remove your V shaped spring and raise the lower spring perch higher to avoid the wheels and tires interfering.
Awesome post david. I'm interested in running a similar setup as below. My understanding is that this example is running 18x9.5 et35 and 18.10 et25 with 275/35 square tires. I have the same spec rims and am shopping for some competition tires for track use.

Problem is, I have kw v3 which have the progressive spring. I'm dialed in at around -3.5 degrees front camber. I don't rub at all with 19x8.5 et32 with 245/35 tire. Do you know how my car would respond to a 275/35 front on 18x9.5 et35? I am not opposed to using spacers.

__________________
'07 MCoupe
lots of mods
Appreciate 0
      12-27-2013, 04:04 PM   #11
ApexRaceParts
Colonel
883
Rep
2,415
Posts

Drives: M3
Join Date: Jun 2012
Location: Bay Area

iTrader: (2)

Quote:
Originally Posted by zubydafa View Post
Awesome post david. I'm interested in running a similar setup as below. My understanding is that this example is running 18x9.5 et35 and 18.10 et25 with 275/35 square tires. I have the same spec rims and am shopping for some competition tires for track use.

Problem is, I have kw v3 which have the progressive spring. I'm dialed in at around -3.5 degrees front camber. I don't rub at all with 19x8.5 et32 with 245/35 tire. Do you know how my car would respond to a 275/35 front on 18x9.5 et35? I am not opposed to using spacers.

275/35/18 is a pretty wide tire for an 18x9.5" wheel in the front of a Z4. We have experienced clearance issues with the KW suspension with the 18x9.5" ET35 and a 255/35/18 tire, which is why we recommend a 5mm spacer for that setup. Since you have the V-shaped progressive springs with your V3's and you plan on running a 275 tire, you may need a 12mm spacer or larger to clear the spring perch. This may require additional camber as well to clear the fender since you will be pushing the wheels further out past the fender than you would with a 5mm spacer.

This fitment will also depend on the model and brand of the tire you plan on running as some tires run wider than others. You may need to play with spacer sizes and camber settings to find the ideal setup for you. Please let us know if you have any other fitment questions and we'd be happy to assist you.
Appreciate 0
      12-27-2013, 11:01 PM   #12
RedDotRacer
Private First Class
15
Rep
175
Posts

Drives: 07 Z4mc
Join Date: Dec 2011
Location: San Diego

iTrader: (1)

Hey Dave, any pics of an alpine white m coupe with concave all around in satin black and hyper silver? I'm undecided on the two colors.
Appreciate 1
      01-02-2014, 07:22 PM   #13
ApexRaceParts
Colonel
883
Rep
2,415
Posts

Drives: M3
Join Date: Jun 2012
Location: Bay Area

iTrader: (2)

Quote:
Originally Posted by RedDotRacer View Post
Hey Dave, any pics of an alpine white m coupe with concave all around in satin black and hyper silver? I'm undecided on the two colors.
I will take a look for you and send over a PM!

Last edited by ApexRaceParts; 05-06-2014 at 04:16 PM..
Appreciate 0
      01-04-2014, 02:27 AM   #14
RedDotRacer
Private First Class
15
Rep
175
Posts

Drives: 07 Z4mc
Join Date: Dec 2011
Location: San Diego

iTrader: (1)

Sounds good. I'll wait for your pm. The black looks good.
Appreciate 0
      04-24-2014, 03:32 PM   #15
donoman
Rookie
17
Rep
379
Posts

Drives: 03 Z4 2.5i 5MT
Join Date: Dec 2012
Location: Santa Clara, CA

iTrader: (1)

Hello David, I have both a Z4 and Z4MC, could you please elaborate which one of the wheels you have below are flat-faced or concave? Thank you!!!

17x8.5" ET20 - 16.50lbs - $259
17x8.5" ET40 - 17.20lbs - $249 - Z4 Non-M Fitment
17x9.0" ET30 - 16.50lbs - $264 - Z4M Fitment
17x9.0" ET42 - 17.20lbs - $259 - Z4 Non-M and Z4M Fitment
17x9.5" ET35 - 16.95lbs - $269 - Z4M Fitment
17x10" ET25 - 18.45lbs - $284 - Z4M Fitment
17x10.5" ET27 - 18.95lbs - $299
18x8.5" ET38 - 18.45lbs - $289 - Z4 Non-M and Z4M Fitment
18x8.5" ET45 - 18.20lbs - $289
18x9.0" ET42 - 18.65lbs - $299 - Z4 Non-M and Z4M Fitment
18x9.5" ET62 - 18.20lbs - $314
18x9.5" ET35 - 18.85lbs - $314 - Z4M Fitment
18x9.5" ET22 - 19.20lbs - $314 - Z4M Fitment
18x10" ET25 - 19.95lbs - $324 - Z4M Fitment
18x10.5" ET27 - 20.45lbs - $344
__________________
2003 Z4 2.5i
2013 FR-S
1990 911 C2
1983 Wife
Appreciate 0
      04-24-2014, 06:47 PM   #16
Expert@ApexRaceParts
Brigadier General
Expert@ApexRaceParts's Avatar
1232
Rep
4,645
Posts

Drives: M3
Join Date: Jun 2012
Location: Bay Area

iTrader: (0)

Quote:
Originally Posted by donoman View Post
Hello David, I have both a Z4 and Z4MC, could you please elaborate which one of the wheels you have below are flat-faced or concave? Thank you!!!

Concave - 17x8.5" ET20 - 16.50lbs - $259
Flat Faced - 17x8.5" ET40 - 17.20lbs - $249 - Z4 Non-M Fitment
Concave - 17x9.0" ET30 - 16.50lbs - $264 - Z4M Fitment
Flat Faced - 17x9.0" ET42 - 17.20lbs - $259 - Z4 Non-M and Z4M Fitment
Concave - 17x9.5" ET35 - 16.95lbs - $269 - Z4M Fitment
Concave - 17x10" ET25 - 18.45lbs - $284 - Z4M Fitment
Concave - 17x10.5" ET27 - 18.95lbs - $299
Flat Faced - 18x8.5" ET38 - 18.45lbs - $289 - Z4 Non-M and Z4M Fitment
Flat Faced - 18x8.5" ET45 - 18.20lbs - $289
Flat Faced - 18x9.0" ET42 - 18.65lbs - $299 - Z4 Non-M and Z4M Fitment
Flat Faced - 18x9.5" ET62 - 18.20lbs - $314
Concave - 18x9.5" ET35 - 18.85lbs - $314 - Z4M Fitment
Concave - 18x9.5" ET22 - 19.20lbs - $314 - Z4M Fitment
Concave - 18x10" ET25 - 19.95lbs - $324 - Z4M Fitment
Concave - 18x10.5" ET27 - 20.45lbs - $344
Absolutely, I've notated all the Flat Faced and Concave wheels as you have requested above.
Appreciate 0
      04-24-2014, 08:02 PM   #17
donoman
Rookie
17
Rep
379
Posts

Drives: 03 Z4 2.5i 5MT
Join Date: Dec 2012
Location: Santa Clara, CA

iTrader: (1)

Thank you... So, no concave front fitments for non-M Z4 even in 17"?
Also, when you say they will "fit" below, are you assuming stock suspension? Neither of my cars have any heavy camber plates (yet) because I want to keep them very streetable... Thank you for your response and time.


Flat Faced - 17x8.5" ET40 - 17.20lbs - $249 - Z4 Non-M Fitment
Flat Faced - 17x9.0" ET42 - 17.20lbs - $259 - Z4 Non-M and Z4M Fitment

Flat Faced - 18x8.5" ET38 - 18.45lbs - $289 - Z4 Non-M and Z4M Fitment
Flat Faced - 18x8.5" ET45 - 18.20lbs - $289
Flat Faced - 18x9.0" ET42 - 18.65lbs - $299 - Z4 Non-M and Z4M Fitment
Flat Faced - 18x9.5" ET62 - 18.20lbs - $314

Concave - 17x8.5" ET20 - 16.50lbs - $259
Concave - 17x9.0" ET30 - 16.50lbs - $264 - Z4M Fitment
Concave - 17x9.5" ET35 - 16.95lbs - $269 - Z4M Fitment
Concave - 17x10" ET25 - 18.45lbs - $284 - Z4M Fitment
Concave - 17x10.5" ET27 - 18.95lbs - $299

Concave - 18x9.5" ET35 - 18.85lbs - $314 - Z4M Fitment
Concave - 18x9.5" ET22 - 19.20lbs - $314 - Z4M Fitment
Concave - 18x10" ET25 - 19.95lbs - $324 - Z4M Fitment
Concave - 18x10.5" ET27 - 20.45lbs - $344
__________________
2003 Z4 2.5i
2013 FR-S
1990 911 C2
1983 Wife
Appreciate 0
      04-25-2014, 12:43 PM   #18
Expert@ApexRaceParts
Brigadier General
Expert@ApexRaceParts's Avatar
1232
Rep
4,645
Posts

Drives: M3
Join Date: Jun 2012
Location: Bay Area

iTrader: (0)

Quote:
Originally Posted by donoman View Post
Thank you... So, no concave front fitments for non-M Z4 even in 17"?
Also, when you say they will "fit" below, are you assuming stock suspension? Neither of my cars have any heavy camber plates (yet) because I want to keep them very streetable... Thank you for your response and time.


Flat Faced - 17x8.5" ET40 - 17.20lbs - $249 - Z4 Non-M Fitment
Flat Faced - 17x9.0" ET42 - 17.20lbs - $259 - Z4 Non-M and Z4M Fitment

Flat Faced - 18x8.5" ET38 - 18.45lbs - $289 - Z4 Non-M and Z4M Fitment
Flat Faced - 18x8.5" ET45 - 18.20lbs - $289
Flat Faced - 18x9.0" ET42 - 18.65lbs - $299 - Z4 Non-M and Z4M Fitment
Flat Faced - 18x9.5" ET62 - 18.20lbs - $314

Concave - 17x8.5" ET20 - 16.50lbs - $259
Concave - 17x9.0" ET30 - 16.50lbs - $264 - Z4M Fitment
Concave - 17x9.5" ET35 - 16.95lbs - $269 - Z4M Fitment
Concave - 17x10" ET25 - 18.45lbs - $284 - Z4M Fitment
Concave - 17x10.5" ET27 - 18.95lbs - $299

Concave - 18x9.5" ET35 - 18.85lbs - $314 - Z4M Fitment
Concave - 18x9.5" ET22 - 19.20lbs - $314 - Z4M Fitment
Concave - 18x10" ET25 - 19.95lbs - $324 - Z4M Fitment
Concave - 18x10.5" ET27 - 20.45lbs - $344
That is correct, there isn't any direct fitments available for the Z4 non-M with the concave wheels. These recommended fitments are indeed for meant cars with OEM or close to OEM suspension. There are more aggressive fitments available, but those would require suspension modifications with camber plates.
Appreciate 0
      04-29-2014, 05:56 PM   #19
Expert@ApexRaceParts
Brigadier General
Expert@ApexRaceParts's Avatar
1232
Rep
4,645
Posts

Drives: M3
Join Date: Jun 2012
Location: Bay Area

iTrader: (0)

Here's an example of a track setup for a Z4M, squared 18x9.5" ET35 Hyper Black ARC-8s with 265/35/18:



Feel free to contact us directly if you have any questions.
Appreciate 0
      04-30-2014, 01:06 AM   #20
donoman
Rookie
17
Rep
379
Posts

Drives: 03 Z4 2.5i 5MT
Join Date: Dec 2012
Location: Santa Clara, CA

iTrader: (1)

Quote:
Originally Posted by David@ApexRaceParts View Post
Here's an example of a track setup for a Z4M, squared 18x9.5" ET35 Hyper Black ARC-8s with 265/35/18:



Feel free to contact us directly if you have any questions.
This fitment looks good! Will it work on a Z4MC with stock suspension?
__________________
2003 Z4 2.5i
2013 FR-S
1990 911 C2
1983 Wife
Appreciate 0
      04-30-2014, 05:41 PM   #21
Expert@ApexRaceParts
Brigadier General
Expert@ApexRaceParts's Avatar
1232
Rep
4,645
Posts

Drives: M3
Join Date: Jun 2012
Location: Bay Area

iTrader: (0)

Quote:
Originally Posted by donoman View Post
This fitment looks good! Will it work on a Z4MC with stock suspension?
Unfortunately, this fitment would require camber plates to fit on the front of the car without rubbing onto the fender. The OEM suspension would not be compatible without camber plates.
Appreciate 0
      05-05-2014, 07:54 PM   #22
blitzkrieg989
Enlisted Member
1
Rep
37
Posts

Drives: Z4MC
Join Date: Mar 2014
Location: New Jersey

iTrader: (1)

Quote:
Originally Posted by ApexRaceParts View Post
ARC-8's are in stock for your Z4M and Z4 in multiple staggered and square fitments!



Please call, email, or pm us with any questions you may have.
Are those Hyper Black?
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 01:22 PM.




zpost
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST