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      01-04-2019, 07:19 PM   #1
PeterKBMW
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M2C 19" Square Track Wheel/Tire combo

Has anyone with an M2 Competition swapped to a 19" square wheel & tire combo for track use? Trying to avoid replacing the brakes to go down to an 18" wheel. Any help or insight is appreciated!
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      01-04-2019, 11:46 PM   #2
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Use Rays TE37. It clears everything. Probably 18" can handle M2C 6-4 setup.
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      01-07-2019, 11:21 PM   #3
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Quote:
Originally Posted by SeanWRT View Post
Use Rays TE37. It clears everything. Probably 18" can handle M2C 6-4 setup.
Also interested in options here. Anyone experience with TE37 on M2c?
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      01-08-2019, 09:13 AM   #4
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Quote:
Originally Posted by SeanWRT View Post
Use Rays TE37. It clears everything. Probably 18" can handle M2C 6-4 setup.
No way an 18 will fit over the 400mm brakes
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      01-08-2019, 12:15 PM   #5
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stock 19 2NH clearance... notice the ring of scrape from small pebble.

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      01-08-2019, 12:42 PM   #6
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stock 19 2NH clearance... notice the ring of scrape from small pebble.
Dang surprised the factory would leave that little clearance.
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      01-08-2019, 01:41 PM   #7
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Originally Posted by CosmosMpower View Post
Dang surprised the factory would leave that little clearance.
imagine bending it at 100+
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      01-08-2019, 04:08 PM   #8
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We have a couple drivers running our 19x9" ET30 SM-10 wheels as a square fitment. These are for a winter setup with 245/35-19 tires.

We are planning on producing our standard M2-specific widths and offsets in a 19" diameter later this year. Wheel specifications will be 19x9.5" ET28 front and 19x10.5" ET40 rear for those that desire a staggered fitment. A rotatable square setup can also be achieved using the 19x9.5" ET28.

EDIT: We are now in production! LINK

--Dylan
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      01-08-2019, 04:38 PM   #9
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No point in running a skinny 255 on the rear of a M2. The narrowest I'd go is 265 or really 275 ideally if I was going square. I previously ran a 275 square on 18x10. Not sure if a 275 square would fit on a 19".
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      01-08-2019, 04:50 PM   #10
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Quote:
Originally Posted by Expert@ApexRaceParts View Post




We have a couple drivers running our 19x9" ET30 SM-10 wheels as a square fitment. These photos are for a winter setup with 245/35-19 tires, but wider 255s should fit as well, but may need a bit of negative camber up front.

We are planning on producing our M2-specific widths and offsets later this year, which will be 19x9.5" ET28 front and 19x10.5" ET40 rear.

--Dylan
Can we get ET45-47 in the rear? That allows us to fit 295/305 on lowered cars.
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      01-08-2019, 05:01 PM   #11
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Quote:
Originally Posted by CosmosMpower View Post
No point in running a skinny 255 on the rear of a M2. The narrowest I'd go is 265 or really 275 ideally if I was going square. I previously ran a 275 square on 18x10. Not sure if a 275 square would fit on a 19".
Agreed. While it's a great winter fitment, it's not totally ideal for the track. The main point is that the barrels have no issues clearing the brakes. Our 9.5" ET28 and 10.5" ET40 can support up to 275 front and 305 rear tires with some front negative camber. If you were able to fit 275/35-18s, the 19s should be no problem since a 275/30-19 is actually 2mm shorter in overall diameter.

Quote:
Originally Posted by ZM2 View Post
Can we get ET45-47 in the rear? That allows us to fit 295/305 on lowered cars.
Have you seen this done, and were there any inner clearance issues to address? We went with 10.5" ET40 since during our 18" testing we found this to be the ideal offset to fit 295/35 with no modifications and 305/35 with the occasional need for a fender roll depending on tire brand. If a slightly higher offset works better, we'd love to know and potentially offer that option to the community.

--Dylan
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      01-08-2019, 05:16 PM   #12
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I run 19x10.5 ET45 and 295/30 R7’s in the back and am dropped 18mm. I don’t think a 295/30/19 R7 will fit in the back on a lowered car with ET40. The clearance is tight on the outside.

I don’t know the exact clearance left inside the rear, but I know there’s room. My current setup clears with no rubbing, so maybe ET45-46 is the way to go to make sure all types of aftermarket suspension clear on the inside.

The big question is can I get a 305/30 RE-71R to fit with these specs. I haven’t tried it yet, but I think so bc the R7 is so wide.

I would have bought 19x10.5 Apex’s if the ET was more than 40. You guys should mount up some 295 & 305/30s on your 19x10.5 ET40 wheels and put them on a lowered M2 and let us know.

Last edited by ZM2; 01-08-2019 at 05:35 PM..
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      01-08-2019, 06:39 PM   #13
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Quote:
Originally Posted by Expert@ApexRaceParts View Post
We have a couple drivers running our 19x9" ET30 SM-10 wheels as a square fitment. These photos are for a winter setup with 245/35-19 tires, but wider 255s should fit as well, but may need a bit of negative camber up front.

We are planning on producing our M2-specific widths and offsets later this year, which will be 19x9.5" ET28 front and 19x10.5" ET40 rear.

--Dylan
Since you already have the SM-10 in a 10x19et40 for the Mustang, how big a deal would it be to machine the same blank for the BMW centerbore and bolt circle? Pretty please?
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      01-08-2019, 06:48 PM   #14
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Quote:
Originally Posted by CosmosMpower View Post
No point in running a skinny 255 on the rear of a M2. The narrowest I'd go is 265 or really 275 ideally if I was going square. I previously ran a 275 square on 18x10. Not sure if a 275 square would fit on a 19".
There are reports of the 265/35-19s in front rubbing, even on stock suspension. Lowering would probably make things worse. I doubt a 275 would work at all in front. The only way I could see a wide 19 working in front is with a 30-series, and nobody makes such a beastie in a 200tw. That what folks running track or autocross would need to go really w-i-d-e.
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      01-08-2019, 08:24 PM   #15
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I'm on 255 35 19 PS4S at front and 20mm lowered by MPS.

My front wheel spec is 9J ET22, 7mm poker than stock.

The front end is just a paper thickness away from rubbing on full steering turn. There is absolutely no room for bigger tire or more lowering.

Keep in mind, above I'm talking about rubbing on full turn.
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      01-09-2019, 09:29 AM   #16
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Quote:
Originally Posted by Old Geezer View Post
There are reports of the 265/35-19s in front rubbing, even on stock suspension. Lowering would probably make things worse. I doubt a 275 would work at all in front. The only way I could see a wide 19 working in front is with a 30-series, and nobody makes such a beastie in a 200tw. That what folks running track or autocross would need to go really w-i-d-e.
LOL 200 treadwear tires...cute.
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      01-15-2019, 09:32 PM   #17
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Dylan,

What's your email address?
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      01-17-2019, 11:32 AM   #18
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Will the FL5 be available in M2C fitments similar to the SM10?
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      01-17-2019, 11:54 AM   #19
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Quote:
Originally Posted by Old Geezer View Post
Since you already have the SM-10 in a 10x19et40 for the Mustang, how big a deal would it be to machine the same blank for the BMW centerbore and bolt circle? Pretty please?
Not a big deal at all. We'll have a solution available in the coming months.

Quote:
Originally Posted by PeterKBMW View Post
Dylan,

What's your email address?
I can be reached either via forum PM or info@apexraceparts.com, just put my name in the subject and I'll see the notification!

Quote:
Originally Posted by mcgarnigle View Post
Will the FL5 be available in M2C fitments similar to the SM10?
I couldn't guarantee a 19" FL-5 fitment at the moment, but it's definitely up for consideration. I'll know more in the next 2-3 months.

--Dylan
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      03-15-2019, 04:46 PM   #20
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I wanted to follow up here with some great news. We now have both square and staggered 19" fitments in production and available for pre-order that will clear the M2C brakes and maximize tire width options.

We chose the EC-7 design since it looks great, and is a bit more affordable than our SM-10 and FL-5 designs.

The APEX 19" M2 Competition track fitments are:

Square:
Front & Rear: 19x9.5" ET28 with 265/30-19 tires
- Slight front negative camber required
- 275/30-19 tires can also be used with additional camber.
Staggered:
Front: 19x9.5" ET28 with 265/30-19 tires
Rear: 19x10.5" ET40 with 285/30-19 tires
- Direct fit with slight front negative camber
- Front 275/30-19 tires can also be used with additional camber
- Rear 295/30-19 tires can also be used as a direct fit.
- Rear 305/30-19 tires can also be used, but may require rolled fenders or negative camber to prevent rubbing.
These sizes are available now through a group buy which ends on 4/16/2019 at midnight Pacific time. Expected ship date is July. Anyone interested can sign up here.

--Dylan
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      03-16-2019, 01:53 PM   #21
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Quote:
Originally Posted by Expert@ApexRaceParts View Post
I wanted to follow up here with some great news. We now have both square and staggered 19" fitments in production and available for pre-order that will clear the M2C brakes and maximize tire width options.

We chose the EC-7 design since it looks great, and is a bit more affordable than our SM-10 and FL-5 designs.

The APEX 19" M2 Competition track fitments are:

Square:
Front & Rear: 19x9.5" ET28 with 265/30-19 tires
- Slight front negative camber required
- 275/30-19 tires can also be used with additional camber.
Staggered:
Front: 19x9.5" ET28 with 265/30-19 tires
Rear: 19x10.5" ET40 with 285/30-19 tires
- Direct fit with slight front negative camber
- Front 275/30-19 tires can also be used with additional camber
- Rear 295/30-19 tires can also be used as a direct fit.
- Rear 305/30-19 tires can also be used, but may require rolled fenders or negative camber to prevent rubbing.
These sizes are available now through a group buy which ends on 4/16/2019 at midnight Pacific time. Expected ship date is July. Anyone interested can sign up here.

--Dylan
To confirm, all of the recommended tire sizes are 30-series profile, not 35? Even the 265 square is a 30?
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      03-18-2019, 12:06 PM   #22
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Quote:
Originally Posted by mcgarnigle View Post
To confirm, all of the recommended tire sizes are 30-series profile, not 35? Even the 265 square is a 30?
That is correct. A 265-wide 19" tire needs to have a 30 profile in order to fit up front without rubbing. It's also a closer match than 265/35-19 to the OEM 245/35-19 front tire size, although it is a bit shorter.

For a closer-to-OEM match, you may be able to use 255/35 front and 275/35 rear, but you'd be giving up additional grip and sidewall support vs. using our recommended sizes, and the fronts may still brush the fender liner on full-lock turns.

--Dylan
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