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      06-30-2017, 12:03 PM   #23
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Lordy, I might have to get a set of these. Spokes look great, wonder if they're a bitch to clean lol
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      07-17-2017, 06:16 PM   #24
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Kamel's 335i Coupe with SM-10 Wheels.
  • Wheels: 18x9 ET30 and 18x9.5 ET35 Race Silver SM-10's.
  • Tires: 245/40-18 and 265/35-18 Continental ExtremeContact Sport Tires
  • Suspension: Bilstein B16 PSS-10 Coilovers with E92 M3 Control Arms front and rear
  • Alignment: Front camber 1.2 degrees, rear camber 1.5 degrees.




Last edited by Expert@ApexRaceParts; 07-31-2017 at 05:33 PM.
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      05-13-2018, 08:59 PM   #25
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What combo of staggered wheels fit best on M roadster with stock suspension and alignment settings with -2.0* front and -1.5* rear? Looking to fit 245/40 and 275/35 extreme summer compound e.g. RS-4 or Star Specs without fender rolling or spacers. The more flush the better but don’t want undue stress on the hub lips neither.

Fronts: 18x9.0 et30 / 18x9.5 et35 / 18x9.5 et28
Rears: 18x9.5 et22 / 18x10 et25
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Last edited by 3002 tii; 05-13-2018 at 09:18 PM.
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      05-14-2018, 05:01 AM   #26
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Quote:
Originally Posted by 3002 tii View Post
Expert@ApexRaceParts

What combo of staggered wheels fit best on M roadster with stock suspension and alignment settings with -2.0* front and -1.5* rear? Looking to fit 245/40 and 275/35 extreme summer compound e.g. RS-4 or Star Specs without fender rolling or spacers. The more flush the better but dont want undue stress on the hub lips neither.

Fronts: 18x9.0 et30 / 18x9.5 et35 / 18x9.5 et28
Rears: 18x9.5 et22 / 18x10 et25
3002 tii,

We would recommend the following fitment for your application:

Front: 18x8.5" ET35 - 235/40-18
Rear: 18x9.5 ET22 - 275/35-18

OR

Front: 18x9" ET30 - 235/40-18
Rear: 18x10" ET25 - 275/35-18

Please keep in mind that with the 18x9 ET30/18x10 ET25 fitment, a 245/40-18 tire is not recommended. That tire is a bit too tall and might cause extra headache when it comes to front clearance. We would recommend sticking with a 235/40-18 tire for optimum fitment on your M Roadster!

A 275/35-18 in the rear should clear in the rear given your current camber at -1.5˚ but we cannot guarantee this, as every car is a bit different. Ride height and tire compound can play a roll in clearance to the fenders.

The 18x8.5 ET35 and 18x9.5 ET22 fitment listed above will be a direct fit for your application and will not require spacers or fender work, provided that you stick with the tire sizes we have outlined. Below is a photo of this setup with our EC-7 wheels for reference:



I hope this information was helpful. If you have any further questions, feel free to reach out to us!

- Max
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      05-14-2018, 08:09 AM   #27
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Quote:
Originally Posted by Expert@ApexRaceParts View Post
3002 tii,

We would recommend the following fitment for your application:

Front: 18x8.5" ET35 - 235/40-18
Rear: 18x9.5 ET22 - 275/35-18

OR

Front: 18x9" ET30 - 235/40-18
Rear: 18x10" ET25 - 275/35-18

Please keep in mind that with the 18x9 ET30/18x10 ET25 fitment, a 245/40-18 tire is not recommended. That tire is a bit too tall and might cause extra headache when it comes to front clearance. We would recommend sticking with a 235/40-18 tire for optimum fitment on your M Roadster!

A 275/35-18 in the rear should clear in the rear given your current camber at -1.5˚ but we cannot guarantee this, as every car is a bit different. Ride height and tire compound can play a roll in clearance to the fenders.

The 18x8.5 ET35 and 18x9.5 ET22 fitment listed above will be a direct fit for your application and will not require spacers or fender work, provided that you stick with the tire sizes we have outlined. Below is a photo of this setup with our EC-7 wheels for reference:



I hope this information was helpful. If you have any further questions, feel free to reach out to us!

- Max
Max, thanks for detailed response. Im surprised 245 is too tall considering its still 1/3 shorter than stock. So then I guess my next question is how much camber is necessary to stuff a 245-255 up front? This would be for a road course setup so I would prefer more grip up front. If I am limited to 235, then I might even dial the rear back to 265, using same rear width recommendations as above. Thoughts?
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      05-15-2018, 12:13 PM   #28
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Quote:
Originally Posted by 3002 tii View Post
Max, thanks for detailed response. Im surprised 245 is too tall considering its still 1/3 shorter than stock. So then I guess my next question is how much camber is necessary to stuff a 245-255 up front? This would be for a road course setup so I would prefer more grip up front. If I am limited to 235, then I might even dial the rear back to 265, using same rear width recommendations as above. Thoughts?
3002 tii,

Apologies on the 245/40-18 recommendation above. This tire size can work but will not be a direct fit on the 18x9 ET30 and will require some camber to aid in fitment.

We would recommend the 18x9 ET30 to pair with the 255/35-18 or a 245/40-18. Camber is required for both of these tire fitments (-2.2˚ and -1.8˚ respectively).

We have had quite a few enthusiasts who have managed to run our 18x9.5 ET35 up front and the 18x10 ET25 in the rear. You will need to use a 5mm spacer and about -2.2˚ camber up front to clear the suspension and the fender. Camber will vary based on ride height and tire compound.

For this setup we would recommend the 255/35-18 up front and a 275/35-18 in the rear for optimal sidewall support. The 275/35-18 will clear in the rear without a fender roll unless you are running at a lower ride height but camber is required. In that case, we would recommend maxing out the stock camber arms or rolling the rear fenders to aid in clearance.

- Max
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      05-15-2018, 05:06 PM   #29
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245/40/18 fits without rub on Z4 Ms on stock camber. I fit a set on 18" x 8.5" ET 35 (not Apex, sorry) up front at stock camber settings and it works just fine. For an OE fit without stretching tires, the 8.5" ET35 is the most ideal fit.

245/40/18 also fits fine without rub on 18" x 9" ET 30, although I can't say without camber. That's what I'm running right out on my spare set of OE rears up front at -3 camber. Tires are stretched enough where if I were to drop the tire with wheels on a flat ground, it would contact the rim. 255 would be a better size to run to afford some minor protection to the rim.

Say hi to Eddie for me, I had dinner with him and Patrick about a month ago at Buttonwillow.
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      05-16-2018, 12:10 AM   #30
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Originally Posted by The HACK View Post
245/40/18 fits without rub on Z4 Ms on stock camber. I fit a set on 18" x 8.5" ET 35 (not Apex, sorry) up front at stock camber settings and it works just fine. For an OE fit without stretching tires, the 8.5" ET35 is the most ideal fit.

245/40/18 also fits fine without rub on 18" x 9" ET 30, although I can't say without camber. That's what I'm running right out on my spare set of OE rears up front at -3 camber. Tires are stretched enough where if I were to drop the tire with wheels on a flat ground, it would contact the rim. 255 would be a better size to run to afford some minor protection to the rim.

Say hi to Eddie for me, I had dinner with him and Patrick about a month ago at Buttonwillow.
Hack - what tires are you running? Surprised to hear that 245 is slightly stretched on a 9...

Do you think theres any adverse effects on handling by running mismatched diameters, e.g. taller tires in rear by +0.3 relative to fronts?
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      05-16-2018, 03:10 AM   #31
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Quote:
Originally Posted by 3002 tii View Post
Hack - what tires are you running? Surprised to hear that 245 is slightly stretched on a 9...

Do you think theres any adverse effects on handling by running mismatched diameters, e.g. taller tires in rear by +0.3 relative to fronts?
Ive run Toyo R1Rs, Falken Azeris RT615Ks, and Nitto NT01s on 8.5 et35 up front. Im running Federal 595 RSR-R on the 9 rims.

245/40/R18 nominal width is 8.5. On 9 rims it doesnt look stretched, but the RSR-Rs has zero rim protection so the slightly (0.5) wider rim when laid flat, the metal of the rim touches the ground.
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      01-09-2019, 11:28 PM   #32
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I finally did it and placed my order on Dec 31...just got the wheels today. These SM-10 wheels are gorgeous.... I'll get pics when I mount them with new tires this spring.

My set up will be :
Front: 18x8.5" ET35 - 235/40-18
Rear: 18x9.5 ET22 - 275/35-18
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      02-09-2019, 12:56 PM   #33
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Finally installed my FL-5's.18x 8.5,9.5 235/40 & 265/35's . No spacers,More pics to come.:-)
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