[Fatal Flash]

Hey Guys,

I was trying on 18" Apex wheels on the M2 in the driveway, and the caliper was rubbing. I see some guys are mentioning 18" setups - has anyone pulled this off without rubbing?

I'm unsure how someone can be running an 18" setup, if I can't even let the wheel spin freely without scarring the caliper....

Help!

[MagnusT]

Anyone tried BBS SR in 18"??

http://www.bbs-usa.com/road_wheels/w...s.cfm?wheel=89

[David@ActiveAutowerke]

Your offset is probably wrong. We have fit multiple sets of 18" wheels on our M2 including a set of APEX's.

[QM]

OP,
What wheels size and offset are you using? For the EC-7 wheel, Apex recommends 18x9 wheel with ET31. See the group buy thread. I'm hoping that is not what you were trying on as I'm about to pull a trigger on this square setup. That would be one unpleasant surprise....

[Pol]

BMW prescribes front ET27 and rear ET29 on the 640M's.

[andrettifan]

Originally Posted by QM

OP,
What wheels size and offset are you using? For the EC-7 wheel, Apex recommends 18x9 wheel with ET31. See the group buy thread. I'm hoping that is not what you were trying on as I'm about to pull a trigger on this square setup. That would be one unpleasant surprise....

I am about to pull that same trigger and would REALLY like some confirmation that the 18 x 9 inch ET31 will fit and work on the M2.

[WaMi]

Originally Posted by David@ActiveAutowerke

Your offset is probably wrong. We have fit multiple sets of 18" wheels on our M2 including a set of APEX's

What size are you using for the EC-7? Offset?

Originally Posted by Fatal Flash

Hey Guys,

I was trying on 18" Apex wheels on the M2 in the driveway, and the caliper was rubbing. I see some guys are mentioning 18" setups - has anyone pulled this off without rubbing?

I'm unsure how someone can be running an 18" setup, if I can't even let the wheel spin freely without scarring the caliper....

Help!

Which wheel are you using? What size? Offset?

[ApexWheels]

OP did not mention which APEX 18" design he/she tested, so I am thinking they tried an ARC-8 or PS-7 design which does not in fact clear (unless using 19" diameter). The 18" EC-7 design has superior caliper clearance, and is one of the few 18" wheels on the market that will clear the steel M2, M3/M4 brakes

- Ryan

[dcgolfdr]

18x10 doesn't work? What size tire on the 18x9 for a square setup?

[WaMi]

Originally Posted by dcgolfdr

18x10 doesn't work? What size tire on the 18x9 for a square setup?

245/40-18

[dcgolfdr]

Originally Posted by WaMi

245/40-18

Doesn't 245 in the rear seem small?

[WaMi]

Originally Posted by dcgolfdr

Doesn't 245 in the rear seem small?

I'm a total noob when it comes to this stuff, but from what I've learned through talking with those that know what they're doing and browsing the forums, it's not too small. We want narrower tire width for winter conditions. The narrower the tire, the better the traction will be in deep snow. With the car being rear wheel drive, I would want a narrower tire on the rear so the 245 would be an advantage over the 255 width.

[dcgolfdr]

I get that for winter but I am talking about wheels and tires for the track. I was hoping we could run 275/35/18 all around.

[Rudy@tirerack]

We now have some 18x9.5 track wheels available for the M2.

http://f87.bimmerpost.com/forums/sho...0#post20667960

[WaMi]

Originally Posted by Keith@tirerack.com

The BBS SR will not clear the brakes on the M2.

Is the Tire Rack website showing incorrect wheels then? If you try to configure an 18" winter tire and wheel package for the 2017 M2, the 18" BBS SR comes up as a possible option.

[Rudy@tirerack]

Originally Posted by WaMi

Is the Tire Rack website showing incorrect wheels then? If you try to configure an 18" winter tire and wheel package for the 2017 M2, the 18" BBS SR comes up as a possible option.

My bad! Good catch. I was mistaken and was looking at the wrong offset.
The BBS SR will work in a 18x8 ET32!

[Fatal Flash]

Hey Guys,

The wheels we tried on were ARC-8....as Apex replied earlier, they don't fit!!!


So now I'm scared..how do we know what fits, and what doesn't, on the market?

PS - I know this has been addressed a million times, what's the thickest profile someone has used on front/rear with 18s', 2XX/40?/18 ?

[dcgolfdr]

Apex sent me a message that EC-7 18x9.5 + 22 with 265/35/18 square will not rub and not require modification.

[ApexWheels]

Originally Posted by dcgolfdr

Apex sent me a message that EC-7 18x9.5 + 22 with 265/35/18 square will not rub and not require modification.

Thank you for your post. The fitment that you have listed will be aggressive/flush on the M2, and may in fact require modification in the form of negative camber. This particular fitment has worked well for many enthusiasts, but I just want to clarify that it is not always a guaranteed bolt-on fitment. There are many variables at play here, especially for a track oriented setup where maximizing wheel width and tire width is the goal. Vehicle ride height, suspension type, camber specifications, and tire brand will make all the difference.

We do not have extensive experience with the M2 platform just yet, but I would like to further explore the limits of this chassis once we are able to perform more R&D.

We will update the community as we learn more

- Ryan

[dcgolfdr]

Originally Posted by ApexRaceParts

Thank you for your post. The fitment that you have listed will be aggressive/flush on the M2, and may in fact require modification in the form of negative camber. This particular fitment has worked well for many enthusiasts, but I just want to clarify that it is not always a guaranteed bolt-on fitment. There are many variables at play here, especially for a track oriented setup where maximizing wheel width and tire width is the goal. Vehicle ride height, suspension type, camber specifications, and tire brand will make all the difference.

We do not have extensive experience with the M2 platform just yet, but I would like to further explore the limits of this chassis once we are able to perform more R&D.

We will update the community as we learn more

- Ryan

Thank you for giving us a more in depth answer than what was previously received.

[ApexWheels]

Originally Posted by dcgolfdr

Thank you for giving us a more in depth answer than what was previously received.

Absolutely. When looking at one of the OEM wheel configurations on the M2 as a baseline, 19x9" ET29 front & 19x10" ET40 rear, we can compare a couple different square options:


APEX 18x9.5" ET22

Up front, our 18x9.5" ET22 will have just about the same inner strut clearance (1mm more), and the outside edge of the wheel will EXTEND an extra 13mm towards the front fenders.

In the rear, our 18x9.5" ET22 will have 24mm MORE clearance on the strut side, and the outside edge of the wheel will EXTEND an extra 12mm towards the rear fenders.

For a street car looking for a flush fitment with street tires, this is probably a good way to go with 265/35-18 street tires. The lower offset would lend itself to a flush fitment without the need for spacers, Depending on ride height and tire brand, a small amount of neg camber may be necessary.

For a track car running r-compounds, it may be better to run our 18x9.5" ET35 wheel for more clearance to the fenders front and rear, allowing more space for r-compounds that tend to run wider then the avg. street tire. This would also allow more room should the driver want to bump up to 275's.

APEX 18x9.5" ET35

Up front, our 18x9.5" ET35 will have 12mm LESS clearance on the strut side, and the outside edge of the wheel will be at the same point.

In the rear, our 18x9.5" ET35 will have 11mm MORE clearance on the strut side, and the outside edge of the wheel will RETRACT 1mm.

With 12mm less clearance to the front struts, this fitment would likely need small spacers up front for proper strut clearance.


APEX 18x10" ET33 - Square

Up front, our 18x10" ET33 will have 17mm LESS clearance on the strut side, and the outside edge of the wheel will EXTEND an extra 9mm towards the front fenders

In the rear, our 18x10" ET33 will have 7mm MORE clearance on the strut side, and the outside edge of the wheel will EXTEND an extra 7mm towards the rear fenders

With 17mm less clearance to the front struts, this fitment would definitely need small spacers up front for proper strut clearance. Negative camber would also be a must for the front of the car.


- Ryan

[BD_F22]

Originally Posted by ApexRaceParts

Absolutely. When looking at one of the OEM wheel configurations on the M2 as a baseline, 19x9" ET29 front & 19x10" ET40 rear, we can compare a couple different square options:

APEX 18x9.5" ET22

Up front, our 18x9.5" ET22 will have just about the same inner strut clearance (1mm more), and the outside edge of the wheel will EXTEND an extra 13mm towards the front fenders.

In the rear, our 18x9.5" ET22 will have 24mm MORE clearance on the strut side, and the outside edge of the wheel will EXTEND an extra 12mm towards the rear fenders.

For a street car looking for a flush fitment with street tires, this is probably a good way to go with 265/35-18 street tires. The lower offset would lend itself to a flush fitment without the need for spacers, Depending on ride height and tire brand, a small amount of neg camber may be necessary.

For a track car running r-compounds, it may be better to run our 18x9.5" ET35 wheel for more clearance to the fenders front and rear, allowing more space for r-compounds that tend to run wider then the avg. street tire. This would also allow more room should the driver want to bump up to 275's.

APEX 18x9.5" ET35

Up front, our 18x9.5" ET35 will have 12mm LESS clearance on the strut side, and the outside edge of the wheel will be at the same point.

In the rear, our 18x9.5" ET35 will have 11mm MORE clearance on the strut side, and the outside edge of the wheel will RETRACT 1mm.

With 12mm less clearance to the front struts, this fitment would likely need small spacers up front for proper strut clearance.


- Ryan

Hey Ryan thanks for the in dept analysis of wheel fitments, now with my understanding though you are saying 18x9.5 ET22 with a 265 out back would be a very flush fitment with no spacers.. If we went with a 18x10.5 ET32 or ET42 would that allow us to incremently up the tire width to compensate for the offset? So theoretically if I went 18x10.5 ET32 would I be able to fit a 275 and if I went 18x10.5 ET42 would I be able to fit a 285? My logic is if I am losing 10mm in offset but adding it in tire width it would equate to the same thing? Am I close or way off?