What wheels are you using for your track setup?

[PrimeBMW]

I would be curious to how the Sport Cup 2 does on stock suspension.......

[CanAutM3]

Originally Posted by PrimeBMW

I would be curious to how the Sport Cup 2 does on stock suspension.......

I don't believe the offer much that would fit an in 18" setup.

For those running 19", it is a good, albeit pricey, alternative.

[gthal]

Originally Posted by CanAutM3

Looks like a viable alternative to the NT01 in 275/35R18.

I wonder what, if any, impact running a 35 vs 40 profile tire would be on the car. Too short but maybe it wouldn't matter

[CanAutM3]

Originally Posted by gthal

I wonder what, if any, impact running a 35 vs 40 profile tire would be on the car. Too short but maybe it wouldn't matter

I was running a 275/35R18 square setup on my E92 and it worked just fine. My street setup was 255-275/35R19 PSS, so pretty much equivalent to the F8X.

I am also considering the 275/40R18 NT01, but a bit concerned about the taller sidewalls. Decisions, decisions

EDIT: Some more data points between the 35 and 40 profiles:
The 275/40R18 will cost you ~$160CAD more per set (+10%)
The 275/40R18 will be heavier (don't know by how much)
Shorter sidewall of the /35 will provide crisper handling
Rolling dia vs stock (F/R)
275/35R18 -1.7%/-3.9%
275/40R18 +2.5%/+0.2%

[AWM3ME2]

Originally Posted by lo flyn

You could also get the EC-7 18X10 with ET43 if you want to run more rubber in the back. A friend has R888 315/30 on CCW rear wheels made special for the M4 (ET44). He says no rubbing at all. He's using 285 in front with offset of ET29.

Terry

Do you know what size wheels and if his car has CCB, thanks in advance.

[gthal]

Originally Posted by CanAutM3

I was running a 275/35R18 square setup on my E92 and it worked just fine. My street setup was 255-275/35R19 PSS, so pretty much equivalent to the F8X.

I am also considering the 275/40R18 NT01, but a bit concerned about the taller sidewalls. Decisions, decisions

EDIT: Some more data points between the 35 and 40 profiles:
The 275/40R18 will cost you ~$160CAD more per set (+10%)
The 275/40R18 will be heavier (don't know by how much)
Shorter sidewall of the /35 will provide crisper handling
Rolling dia vs stock (F/R)
275/35R18 -1.7%/-3.9%
275/40R18 +2.5%/+0.2%

I'm probably being paranoid but I've always been under the impression that you needed to keep rolling diameter with +/- 3%. Maybe that's old school and not relevant today.

I completely agree that less sidewall is better for crispness and that's a quality I prefer... nothing worse than sloppy handling.

[CanAutM3]

Originally Posted by gthal

I'm probably being paranoid but I've always been under the impression that you needed to keep rolling diameter with +/- 3%. Maybe that's old school and not relevant today.

I completely agree that less sidewall is better for crispness and that's a quality I prefer... nothing worse than sloppy handling.

I think what is really important is keeping the front to rear rolling diameter ratio as close as possible to avoid confusing the ABS/DSC computers. A square setup in either 35 or 40 would have the same impact of the front to rear ratio.

Running a square setup on my E92, I could clearly feel that MDM was more intrusive because it was always under the impression that the rear wheels were turning faster than they were supposed to. Since I run with DSC off, it does not really matter anyway. However, I never felt the ABS being confused though and I rarely invoke ABS at the track anyway.

[PrimeBMW]

Originally Posted by CanAutM3

I don't believe the offer much that would fit an in 18" setup.

For those running 19", it is a good, albeit pricey, alternative.

I was thinking in 19" sizes. It might be an arrive and drive type of deal without having to change tires/wheels.

[CanAutM3]

Originally Posted by David@ApexRaceParts

The EC-7's in 18x10" ET25 squared have been a very popular choice amongst F8X M3/M4 owners that previously had an E9X M3. However, if you'd like to fit even more tire onto the car, the 18x10" ET33 squared with a 5mm spacer in front would allow for larger tires than 275/35/18, as the rears would not be as flush and would allow for wider tires to fit. Added negative camber would be suggested for going wider than a 275 sized tire on the F8X.

Hi David,

Question for you.

Would the PS-7 18x10ET25 fit the F8X?

I see these wheels are slightly lighter than the EC-7. Any drawback at using PS-7 vs the EC-7 as track wheels?

[gthal]

Originally Posted by CanAutM3

Hi David,

Question for you.

Would the PS-7 18x10ET25 fit the F8X?

I see these wheels are slightly lighter than the EC-7. Any drawback at using PS-7 vs the EC-7 as track wheels?

+1...

[ApexWheels]

Originally Posted by CanAutM3

Hi David,

Question for you.

Would the PS-7 18x10ET25 fit the F8X?

I see these wheels are slightly lighter than the EC-7. Any drawback at using PS-7 vs the EC-7 as track wheels?

Unfortunately, the PS-7's barrels do not clear the OEM brakes on the F8X, only the EC-7's do. The barrels of the EC-7's are slightly larger, just enough to have the clearance required for the OEM brakes, while both the ARC-8's and PS-7's are unable to clear the OEM brakes.

[CanAutM3]

Originally Posted by ApexRaceParts

Unfortunately, the PS-7's barrels do not clear the OEM brakes on the F8X, only the EC-7's do. The barrels of the EC-7's are slightly larger, just enough to have the clearance required for the OEM brakes, while both the ARC-8's and PS-7's are unable to clear the OEM brakes.

Thank you very much for responding. EC-7 it will be then.

[hyperboost]

Originally Posted by CanAutM3

Thank you very much for responding. EC-7 it will be then.

what size wheel/offset and tire size are you thinking of running?
I have 19x9.5 et20 wheel in the back with 275 tire and no camber, it's almost flush....

[ff1600]

Apex has on their web site a EC-7 18x11 ET25 and 18x10.5 ET27.

Are these not suitable for the rear on the F8x?

[CanAutM3]

Originally Posted by ff1600

Apex has on their web site a EC-7 18x11 ET25 and 18x10.5 ET27.

Are these not suitable for the rear on the F8x?

18x11ET25 will push out the outer face of the wheel by 1.1" (27.7mm) and the 18x10.5E27 will by 0.75" (19.4mm). Both are a bit much IMO.

We need an 18x11 EC-7 with a larger offset to fit in the rear .

[CanAutM3]

Originally Posted by hyperboost

what size wheel/offset and tire size are you thinking of running?
I have 19x9.5 et20 wheel in the back with 275 tire and no camber, it's almost flush....

I am thinking of an 18x10ET25 275/35R18 square setup to start.

As I posted earlier, I like the idea of a square setup for the convenience of being able to do rotations on the fly at the track, especially for 2 or 3 day events.

If ever I find the rear of the M4 lacks grip, I could get 18x11 EC-7 wheels with the proper offset (ET35~40) if they become available. The 18x10ET25 remain a perfect fit in front.

[SYT_Shadow]

At some point I think they'll make the 11" et35 rear they're missing

For the F8X it'll be pretty important to have as much tire in the rear as possible

[ff1600]

Thank you

[Gearhead999s]

I went with a 19x10 25P 19x 11 33P in a Forgestar F14 with Yokohoma AD008R's in275 30 19 & 295 30 19.I am limited to a tire with a wear rating of 140 or better by the rules of an event that I running in later in the year.This seemed to be the best compromise that I could find that should keep the stock balance somewhat intact.I am a little concerned about 33P on the rear being too positive but Forgestar recommended it with the sized of tire that I am running.




www.ontario1500.ca

[hyperboost]

Originally Posted by CanAutM3

I am thinking of an 18x10ET25 275/35R18 square setup to start.

As I posted earlier, I like the idea of a square setup for the convenience of being able to do rotations on the fly at the track, especially for 2 or 3 day events.

If ever I find the rear of the M4 lacks grip, I could get 18x11 EC-7 wheels with the proper offset (ET35~40) if they become available. The 18x10ET25 remain a perfect fit in front.

thanks~

[Gearhead999s]

Originally Posted by Gearhead999s

I went with a 19x10 25P 19x 11 33P in a Forgestar F14 with Yokohoma AD008R's in275 30 19 & 295 30 19.I am limited to a tire with a wear rating of 140 or better by the rules of an event that I running in later in the year.This seemed to be the best compromise that I could find that should keep the stock balance somewhat intact.I am a little concerned about 33P on the rear being too positive but Forgestar recommended it with the sized of tire that I am running.




www.ontario1500.ca

I discovered that my wheels have not been shipped and I was able to change the rear offset from 33 to 37,which I am more comfortable with.

[SYT_Shadow]

Is 37 the best rear offset for fat tires? I thought it was 33