Sneak Peak: Wide APEX ARC-8 Wheels up to 17x10.5"

[Eddy@ApexRaceParts]

New 17" fitments will be in stock and available late April

Members have been requesting wide 17" fitments for years now, so we've released the following new light-weight sizes:

17X8.5" ET20 - 16.55lbs
17X9.0" ET30 - 16.55lbs
17X9.5" ET35 - 16.95lbs
17X10.0" ET41 - 17.45lbs - estimate
17x10.0" ET25 - 18.10lbs - estimate
17X10.5" ET27 - 18.95lbs - higher load rating

The wheels will be available in the same 4 finishes as before:

Hyper Silver
Hyper Black
Anthracite
Satin Black

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


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


APEX ARC-8 17x8.5" ET20 - Hyper Black Finish


APEX ARC-8 17x10.5" ET27 - Hyper Silver Finish


We received VIA certificates from Japan last week, so these are already in production.
All wheels have been tested and the below weights are accurate production weights except for the two marked estimates.
We did not produce test fitment samples for all sizes, so those are estimates based off our CAD files.

Low offset weight reduction: Instead of increasing center pad depth to reach lower offsets, we've increased the concavity of the spokes.
This allows us to reduce weight and eliminate spacers in most applications.
Example: the flatter faced 17x9" ET42 weights 17.4lbs and requires a 0.45lbs spacer to reach ET30.
Our new 17x9" ET30 wheel is 16.55lbs. That is a 1.3lbs savings when factoring in spacer weight.

(E92 335i with StopTech 355mm kit and 17x9" ET30 spacer free)


Barrel shape improvement: The inner diameter of the barrel was increased on these new sizes.
They now have plenty of clearance around a Stoptech 6 piston 355mm kit or Brembo 355mm BBK



Spoke clearance with a Big Brake Kit: The concave wheels will clear stock brake calipers front and rear on all models.
Some models like the E30 M3, E36, and E46 cannot fit these wheels up front if a BBK is installed due to spoke interference.
Rear BBK's are not an issue as they are further inboard.
The E9X M3 and non-m, have no clearance issues when used in conjunction with a BBK due to the front calipers being recessed further in.
This issue was a compromise we had to make, as the majority of customers requesting these unique fitments, were for rear applications, or for cars without a BBK.

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We will be posting fitment data for multiple models/applications each time we have an opportunity to test out an application.

We've already done some E36 testing with 17x9.5's which will be posted shortly. E46 and other fitments will be posted ASAP.

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E9X non-m specific fitment data:

APEX ARC-8 17x9" ET30 Fitment details for E9X non-m
This wheel is for those who want to run 255/40/17 and 245/40/17 extreme summer or r-compound tires square on 9" wheels. Previously members 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 would use 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.

For reference: 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 allows this fitment to work, but it's very close to the fender. Camber plates are recommended for any 255 setup, but they are definitely 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 for E9X non-m
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 E9X LCI models in the rear to understand if anything needs to be done for this to clear properly with select tire sizes. 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 depending on the tire used. 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 with a 5mm spacer 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 setting. We did not measure how much negative camber this was, as it was overkill for the application. 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


All photos below of the front fitment include a 5mm spacer








Rear Fitment

The rear fitment needs nothing on pre-LCI models. It's a direct fitment, and the rear photos below are spacer free.

[canisM3]

waiting to see these on a e36 :o

[ex10psi]

beautiful wheels! i have a set of ARC8's for my E90 M3 18x9.5 and 18x10.5.

I was planning on getting ARC8's for my E36 M3 track car, square 17x9 and run 255 wide tires. So... will these new "concave" design wheels fit on my E36 M3 track car without fender rolling, spacers, etc...? in a 17x9 square setup? can i run an even wider wheel without body work with this new wheel? i love the increased concavity asthetically and functionally! I will be ready to purchase in april. i'm really hoping these will work just fine for a E36 M3 square, please advise eddy, thank you!

[Eddy@ApexRaceParts]

beautiful wheels! i have a set of ARC8's for my E90 M3 18x9.5 and 18x10.5.

I was planning on getting ARC8's for my E36 M3 track car, square 17x9 and run 255 wide tires. So... will these new "concave" design wheels fit on my E36 M3 track car without fender rolling, spacers, etc...? in a 17x9 square setup? can i run an even wider wheel without body work with this new wheel? i love the increased concavity asthetically and functionally! I will be ready to purchase in april. i'm really hoping these will work just fine for a E36 M3 square, please advise eddy, thank you!

17x9" ET30 would be fine up front on an E36 with some negative camber up front. The issue is the rear. It's 12mm more aggressive than would be ideal, so you'd run in to serious fender issues in the rear. The current 17x9" ET42 wheel was spec'ed for the E36, and still remains the wheel of choice for the E36.

Many members with E36's will use wheels like the 17x9.5" wheel, but at the very least they will have flared fenders and be limited on tire sizes unless they have additional fender modifications.

All these sizes are specialty fitments, which is why you don't see them being produced by other manufacturers.

Just a sneak peak of the E36 fitment for now

[ex10psi]

17x9" ET30 would be fine up front on an E36 with some negative camber up front. The issue is the rear. It's 12mm more aggressive than would be ideal, so you'd run in to serious fender issues in the rear. The current 17x9" ET42 wheel was spec'ed for the E36, and still remains the wheel of choice for the E36.

Many members with E36's will use wheels like the 17x9.5" wheel, but at the very least they will have flared fenders and be limited on tire sizes unless they have additional fender modifications.

All these sizes are specialty fitments, which is why you don't see them being produced by other manufacturers.

Just a sneak peak of the E36 fitment for now

I see... so how much fender rolling/massaging are we talking about to get that 17x9 ET30 concave wheel to fit in the rear? i dont mind rolling the fenders a bit but i dont think i want to go through the whole flared fenders/wide body work at this time.

I guess you could run the 17x9 ET30 concave wheel up front, and the standard 17x9 ET42 wheel out back, but i'd imagine that might look "weird"? But maybe thats the solution if I wanted to run lets say... Brembo 355 front BBK kit? i'm assuming this new wheel will clear these BBK's??

Any plans on making a 17x9 ET42 with the deep concavity that will fit at the rear of the E36 M3?

[TC2]

I guess you could run the 17x9 ET30 concave wheel up front, and the standard 17x9 ET42 wheel out back, but i'd imagine that might look "weird"? But maybe thats the solution if I wanted to run lets say... Brembo 355 front BBK kit? i'm assuming this new wheel will clear these BBK's??

The new concave 17" ARC-8 will not clear big brake kits on the E36.
Check the original post.

[FriedKalamari]

in for more e36 content

[tbert122]

Second that! More e36 content. Would Like to run 17x9 with 255's. Will it work?

[jbass524]

The new concave 17" ARC-8 will not clear big brake kits on the E36.
Check the original post.

They will clear the StopTech 355s. That's my 335 in the pics and there is a lot of clearance. Looks to be about 5 MM. Even the older, smaller barrel 17" ARC-8 clears them. I tracked the previous 17" without issue.

I'm sure they will test the new ones with the Brembo 355. There is a lot of clearance with the new 17". Does the Brembo 355 need more room than the StopTech?

[bimerok]

Do you have prices set for those?

[TOOLEAN]

YES! Long awaited. Looking forward to some 17x9.5 / e36 pics!

[jrotax101]

They will clear the StopTech 355s. That's my 335 in the pics and there is a lot of clearance. Looks to be about 5 MM. Even the older, smaller barrel 17" ARC-8 clears them. I tracked the previous 17" without issue.

I'm sure they will test the new ones with the Brembo 355. There is a lot of clearance with the new 17". Does the Brembo 355 need more room than the StopTech?

Fits your car yes, but does not fit the E36 as mentioned by the other guy. The caliper sits much further out on the E36.

[Inv3ctiv3]

So bummed these won't fit an E36 without modification they look so good!

[FriedKalamari]

So bummed these won't fit an E36 without modification they look so good!

meh, if 18x9.5 will fit the 17's sure as well would

[///M3Vader4dr]

any actual pics of hyper silver?

[BadBoostedBmwM3]

meh, if 18x9.5 will fit the 17's sure as well would

Links?? I thought 9.5s wouldn't fit...

[Eddy@ApexRaceParts]

meh, if 18x9.5 will fit the 17's sure as well would

Correct. The reality is that most E36 owners who will run the 17x9.5's will be street fitments with 245/40/17 tires and a rear fender roll. We already have pics of that, and will post them today.

Do you have prices set for those?

Official pricing is not set yet, but it will be inline with the current ARC-8 offering

any actual pics of hyper silver?

Hyper Silver is in the first post.

[BadBoostedBmwM3]

Correct. The reality is that most E36 owners who will run the 17x9.5's will be street fitments with 245/40/17 tires and a rear fender roll. We already have pics of that, and will post them today.





Hyper Silver is in the first post.

Really? Please post. What type of camber and suspension setup?

[FriedKalamari]

Really? Please post. What type of camber and suspension setup?

not gonna derail a 17" thread with 18" pics but go here post #148 http://forums.bimmerforums.com/forum...1253455&page=3

there are many others too

[jeremy5000]

So bummed these won't fit an E36 without modification they look so good!

For the normal 17x9 ones you still need a roll, so it isn't that much different.... Just more of a pull.

[///M3Vader4dr]

I meant on a car, in natural light. thanks.

[xsport652]

very nice. Can't wait to see your new higher offset 18x9.5.

[Eddy@ApexRaceParts]

very nice. Can't wait to see your new higher offset 18x9.5.

We are not producing a new higher offset 18x9.5" ARC-8 wheel.

E36 Fitment details:

APEX ARC-8 17x9.5" ET35 Fitment details for E36

The E36 test car is on Ground Control coilover sleeves, koni yellows and camber plates. In these photos the car is running -3.8 degrees camber up front as this car had a set of our ARC-8 18x9" ET42 wheels with 255/35/18 Hoosier R6 tires and a 20mm spacer installed on it prior to the test. The 18x9's and the Hoosiers are from another E36 we ran in the 25 hours of thunderhill. I will confirm what the rear alignment settings were for these photos.

For this test we used 245/40/17 Hoosier R6 tires and 245/40/17 Dunlop Star Specs. A 5mm spacer was needed up front for strut tube clearance.

-3.8 degrees is more negative camber than is needed up front to fit either tire. We did not adjust his plates to find the least amount needed, as the car was headed off for an event, and it was already dialed in correctly for the 18" setup.

The rear fenders have not been rolled much in the rear, and definitely not flared. As it sits on the Hoosiers, there would be a serious rubbing issue. A flare is needed for the Hoosiers. Street tires might get away with just an aggressive roll.

Hoosier Front









Hoosier Rear









Dunlop Star Spec Front





Dunlop Star Spec Rear

[TOOLEAN]

Thanks for the Pics Eddy! Two questions for you:

1. Just for clarity; the 17x9.5 et35 only needed a 5mm spacer up front? Seems like more spacer would be required, no?
2. Isn't 245mm pretty small for 9.5's? I have take-off C51 kook's on my 17x9.5's and they are stretched pretty bad.

Thanks!

[jeremy5000]

Thanks for the Pics Eddy! Two questions for you:

1. Just for clarity; the 17x9.5 et35 only needed a 5mm spacer up front? Seems like more spacer would be required, no?
2. Isn't 245mm pretty small for 9.5's? I have take-off C51 kook's on my 17x9.5's and they are stretched pretty bad.

Thanks!

18x9.5et35 has been fit on BC coils without a spacer, so 5mm should be all that's needed.