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      02-21-2012, 10:36 PM   #1
Eddy@ApexRaceParts
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Thumbs up the new ideal 17" track wheel

This is being posted here as this new fitment is very track/performance oriented. The ideal fitment would include wide rubber and negative camber. We've been waiting a long time for a wheel with these specifications. Check out the documented fitment test for the new 17" concave APEX ARC-8 wheels

Please note: This is a technical discussion about this new fitment. We cannot/will not discuss pricing or other purchase details in this thread. Please help us keep this thread on topic.

The E9X non-m fitment has long been lacking a 17" wheel with specifications that are ideal for track/street performance applications. Even the current 17" APEX ARC-8 wheels that are popular for this application are a compromise in width/offset for the non-m E9X, and they require spacers in many applications.

The new concave ARC-8 wheel sizes are wider, lighter, have more ideal offsets, and significantly improved Big Brake Kit clearance. Now 17x9's can be run as a square, rotatable, and spacer free setup with a more aggressive face design.

APEX ARC-8 17x9" ET30 - Satin Black Finish


APEX ARC-8 17x9.5" ET35 - Anthracite Finish


New Concave sizes:

17x8.5" ET20
17x9" ET30 - E9X non-m fitment
17x9.5" ET35 - E9X non-m fitment
17x10" ET25
17x10.5" ET27

Release Date:

Late April to early May
All sizes just received VIA certification in Japan last Thursday. They are now in production.

Improved Caliper Clearance:

The E9X brake caliper is located further back in orientation to the hub mounting point than most 3 series models. This means flat faced wheel designs leave excessive amounts of caliper to spoke clearance. Excessive clearance results in excessive wheel weight. Concave spokes make better use of the available space when lower offsets are needed. By using concave spokes we could decrease wheel weight by 1.5lbs when you factor in the weight of spacers needed on higher offset wheels. The inner barrel diameter was also increased to provide additional Caliper to barrel clearance. The original higher offset 17" wheels could not clear some 355mm kits. These new concave wheels clear Brembo and Stoptech 355mm kits with ease.

StopTech 355mm 6 piston BBK behind the new APEX ARC-8 17x9" ET30 test wheel


StopTech 355mm 6 piston BBK behind the new APEX ARC-8 17x9" ET30 test wheel



APEX ARC-8 17x9" ET30 Fitment details
This new fitment weights in at only 16.55lbs. This wheel is for those who want to run 255/40/17 and 245/40/17 tires square on 9" wheels. 335i and 328i customers looking to run 17x9" wheels up front are forced to run spacers with currently available high offset wheels to properly clear the strut tube when running a meaty tire. For example, members who are running our original 17x9" ET42 wheel need a 12mm spacer (30mm effective offset). Instead of adding spacer weight, this new wheel allows for a weight reduction while reaching the required offset for proper extreme summer and r-compound tire clearance.

Below is a test fitment of the 17x9" ET30 wheel on a pre-LCI E92 335i with a 255/40/17 Nitto NT-01 r-compound tire. This car has TC Kline coilovers, Vorshlag camber plates, and M3 control arms. With the camber plates set to the stock setting, this suspension already has around 1 degrees of negative camber due to the M3 control arms in combination with the lowered ride height.

The 255/40/17 NT-01's below are an r-compound tire. Their overall size is wider than most extreme summer tires, and other street tires. If a non r-compound tire were installed, there would be even more fender clearance.

Members are running the current 17x9's with 12mm spacers and 255/40/17's street tires without camber plates. Pulling the pins, and running camber as negative as possible within the factory limits is needed for a proper fitment. Camber plates are recommended for any 255 setup, but they are required if r-compound will be used.

17x9" ET30 strut tube clearance - TC Kline coilovers








17x9" ET30 Rear fitment test


17x9" ET30 Rear fitment test




APEX ARC-8 17x9.5" ET35 Fitment details
This new width/offset combo is ideal for a rear 9.5" direct fitment on all pre-LCI models or as a front fitment on modified E9X applications.

We will be testing this wheel on LCI models in the rear to understand if anything needs to be done for this to clear properly. This offset would set the tire just close enough to the fender that it will most likely clear with most tires, but some wider tire fitments may require minor fender rolling. Because we have not tested this yet, we cannot confirm LCI rear fitments at this time.

For this to fit the front properly, a 3-5mm spacer is required for strut tube clearance. Without the spacer the wheel is extremely close to the strut leaving no room for a tire. The chamfer on this wheel's center-bore was adjusted to provide additional contact with the wheel bearing hub, so they can easily accommodate a 5mm spacer and remain 100% hub-centric. All APEX wheels can accept a 5mm spacer, but this specific wheel was modified for even more hub contact.

If extreme summer or r-compound tires are used in 245/40/17 or 255/40/17 sizes, camber plates will be a must with this wheel size. Without plates the tire could contact the fenders.

Below is a test fitment of the 17x9.5" ET35 wheel on a pre-LCI E92 335i with a 255/40/17 Nitto NT-01 r-compound tire. This car has TC Kline coilovers, Vorshlag camber plates, and M3 control arms. In these photos the camber plates were pushed in to maximum negative camber mode. The photos clearly show that even with this r-compound tire, maximum negative camber is not required for the tire to clear the fender. Less camber could easily be run with the same tire, and even less if narrower tires are used.

17x9.5" ET35 + 5mm spacer: strut tube clearance - TC Kline coilovers


5mm spacer + max camber


5mm spacer + max camber


5mm spacer + max camber


5mm spacer + max camber


Rear Fitment





Please note: This is a technical discussion about this new fitment. We cannot/will not discuss pricing or other purchase details in this thread. Please help us keep this thread on topic.
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      02-22-2012, 11:10 AM   #2
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This is what I've been looking for. So this should clear stock 335i brakes correct?
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      02-22-2012, 11:35 AM   #3
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Very nice. For the "5mm + max camber" setup, what was the final camber measurement?
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      02-28-2012, 04:00 AM   #4
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Really nice, 17x9 ET30 will clear e90 LCI rear? PM the price to M1W 3X8
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      02-28-2012, 09:01 AM   #5
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I'm very interested. Will this wheel be available in any sort of silver color? Not a big deal, just curious..
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      02-28-2012, 12:30 PM   #6
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This is really ideal. The weight savings is huge over your ET42 setup. Sign me up!
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      02-28-2012, 08:14 PM   #7
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*cough* Send me down a set for my E36
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      02-29-2012, 01:43 PM   #8
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Quote:
Originally Posted by tanginaglaz View Post
This is what I've been looking for. So this should clear stock 335i brakes correct?
This will definitely clear the stock brakes. Stock brakes are smaller than the StopTechs in the picture. I used the ARC-8 17s as track wheels when I had stock brakes on my E92 and that was the version that wasn't a direct fitment for the E9#. There will be even more rom for brakes with this fitment.
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      02-29-2012, 09:53 PM   #9
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Quote:
Originally Posted by jbass524 View Post
This will definitely clear the stock brakes. Stock brakes are smaller than the StopTechs in the picture. I used the ARC-8 17s as track wheels when I had stock brakes on my E92 and that was the version that wasn't a direct fitment for the E9#. There will be even more rom for brakes with this fitment.
then you switched to 18's. Any particular reason?
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      03-01-2012, 12:07 PM   #10
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I liked the look and thought they would be faster....DOH! Now I like these better than the 18s, which I have already sold. I have a different car for the track now so I don't need them. I do have ARC-8s as street wheels though

Also, If 18s are faster due to less sidewall flex and maybe less suspension affect I couldn't tell the difference. This is probably due to using tires that have very stiff sidewalls.
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      03-02-2012, 10:34 AM   #11
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Originally Posted by jbass524 View Post
I liked the look and thought they would be faster....DOH! Now I like these better than the 18s, which I have already sold. I have a different car for the track now so I don't need them. I do have ARC-8s as street wheels though

Also, If 18s are faster due to less sidewall flex and maybe less suspension affect I couldn't tell the difference. This is probably due to using tires that have very stiff sidewalls.
What car are you trackin now? BTW, I will be at Laguna on March 16th..with the Audi Club...they still have room for solo/advanced drivers if you can swing it.
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      03-02-2012, 12:26 PM   #12
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Quote:
Originally Posted by vwong View Post
Very nice. For the "5mm + max camber" setup, what was the final camber measurement?
We did not take an alignment reading, we simply knocked the plate in all the way. It was more camber than needed, so we know that max is not needed. From what we know, you should be willing to run -2.5 to get something like this to clear. Plates are mandatory. No stock cars could run this setup.

Quote:
Originally Posted by bmw888
Really nice, 17x9 ET30 will clear e90 LCI rear? PM the price to M1W 3X8
We will have to test this to be sure, but we believe that a 255 extreme summer tire would fit an LCI model. The track width is only 8mm wider, and we know an 18x9.5" ET35 with a 265 tire is right at the point where it could rub. By running a 255 on a narrower wheel it should provide that little bit of clearance needed, even though the offset is more aggressive.

Quote:
Originally Posted by acj75
I'm very interested. Will this wheel be available in any sort of silver color? Not a big deal, just curious..
Here is the 17x10.5" ET27 (NOT an E9X non-m fitment) in Hyper Silver
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      03-02-2012, 12:28 PM   #13
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Originally Posted by paintpro21 View Post
We did not take an alignment reading, we simply knocked the plate in all the way. It was more camber than needed, so we know that max is not needed. From what we know, you should be willing to run -2.5 to get something like this to clear. Plates are mandatory. No stock cars could run this setup.



We will have to test this to be sure, but we believe that a 255 extreme summer tire would fit an LCI model. The track width is only 8mm wider, and we know an 18x9.5" ET35 with a 265 tire is right at the point where it could rub. By running a 255 on a narrower wheel it should provide that little bit of clearance needed, even though the offset is more aggressive.



Here is the 17x10.5" ET27 (NOT an E9X non-m fitment) in Hyper Silver

Eddie, are associated with Bruce/Rob Todd? I know them relatively well. I see Rob's 135i in your sig pic.
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      03-02-2012, 01:28 PM   #14
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Eddie, are associated with Bruce/Rob Todd? I know them relatively well. I see Rob's 135i in your sig pic.
I/we are not affiliated with BR Racing. They are a vendor, I did a test fitment on their cars in the past.
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      03-02-2012, 02:25 PM   #15
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Originally Posted by S4to335 View Post
What car are you trackin now? BTW, I will be at Laguna on March 16th..with the Audi Club...they still have room for solo/advanced drivers if you can swing it.
Hey S,

I am a minor part of an E36 M3 being prepared for GTS2 and I am buying another E36 M3 for myself that is already planned for race setup with ASTs, welded cage, seats w/HANs, hoses, bushings. A no compromise car.

Just need to find the E36 M3 that will become that car. It's not easy to find at a reasonable price. Help?

I shouldn't drive with the Audi club because they probably wouldn't like the way I drive Also, I really don't have a proper car. The 335 is far too fragile and I like it as a daily driver. What are you driving?
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      03-03-2012, 10:35 PM   #16
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was going to pull the trigger on a pair of 18s this month but the cost of tires on 17 inch are half the price of 18 inch..

Looks like im waiting for these!
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      03-03-2012, 11:45 PM   #17
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was going to pull the trigger on a pair of 18s this month but the cost of tires on 17 inch are half the price of 18 inch..

Looks like im waiting for these!
Do you think the larger sidewalls with 17s will be more susceptible to sidewall flex?
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      03-04-2012, 12:04 AM   #18
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Do you think the larger sidewalls with 17s will be more susceptible to sidewall flex?
I dont believe so as I was originally going to run a staggered 18 with 255/40 + 275/35 combo but with 17, ill be going 9.5 squared with 255/30/17 squared.

I believe we will be fine with 17, definitely the size many of the track enthusiasts have been running on this board.
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      03-04-2012, 12:23 AM   #19
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In to see results of LCI fitment tests.
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      03-04-2012, 12:31 AM   #20
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These r legit! I want a set bad lol PM me prices please

17x9.5 and 17x8
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      03-04-2012, 11:32 AM   #21
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Originally Posted by jbass524 View Post
Hey S,

I am a minor part of an E36 M3 being prepared for GTS2 and I am buying another E36 M3 for myself that is already planned for race setup with ASTs, welded cage, seats w/HANs, hoses, bushings. A no compromise car.

Just need to find the E36 M3 that will become that car. It's not easy to find at a reasonable price. Help?

I shouldn't drive with the Audi club because they probably wouldn't like the way I drive Also, I really don't have a proper car. The 335 is far too fragile and I like it as a daily driver. What are you driving?


I am in this for track use right now...gradually making it faster...still got a long way to go.
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      03-04-2012, 01:35 PM   #22
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I can't wait to have an NA car that is much more raw. You need to get that killer paint scheme designed for you on it
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