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      06-24-2019, 11:24 AM   #1
Xantho
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Apex EC-7 18x10” Setup help

Currently I am the owner of a manual 135i with low boost turbos. As a result I am upgrading to Frankenturbo’s TD03 setup and will soon be making 500 hp. So it’s time for new wheels. I’m currently on stock rims with a 235/55 setup, I looked into Apex and liked the EC-7 (specs, price, style.) But I need some help getting wheel and tire size correct.

I want to be able to put power down while not having to modify my fenders/suspension very much. I already have a differential brace making the rear slightly stiffer.

I read on Evolution Racewerks at one point that they run 18x10 in the rear with
285/30/18s. Maybe I don’t want to be that aggressive in the rear as a 235/285 is quiet the stagger but I don’t know with the 1 when it comes to wheels/tires.

To summarize what offset is it possible to run Apex EC-7 wheels
Front: 18x8.5” 235/35/18 (maybe 245) MPS4S Rear: 18x10” 285/30/18 MPSPS2

Or am I asking too much from the stock body?
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      06-24-2019, 11:57 AM   #2
Eyeman
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Anytime you are talking wheels we also need to know the offsets. The only way a 10" rear wheel will work on our cars without work is if it has a 50+ offset. I was bored and went to the Apex website and they only list their 9.5" wheels coming in high offsets.

The next issue is tire brand. An R rated 285 width tire is huge. A Toyo or Falken 285 would be easier to fit than a PSS, etc. But to some degree tires that run small from a practical standpoint really are not giving you more tire.

Btw 235 fronts can take some work sometimes, also depending on the wheel offset, tire brand, you setup, etc.

Assuming you order the 18x9.5et58 rears, I'd start with PS4S 225/40 fr and 265/35 r. See how much space you have while you burn those tires up with your new turbos and then decide if you really want to go bigger.
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      09-11-2019, 02:54 PM   #3
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Xantho,

The design of the 1 series limits both inner and out clearance, thereby requiring high offset wheels.

The 18x10" ET25 is an extremely aggressive fitment for your 135i, and would require fender flares to properly run that setup. Our 1 series specific fitment comes in higher offsets allowing you to maximize wheel and tire width with minimal work to your car. I would recommend the following fitment:

Front: 18x8.5" ET45 with 235/40-18 tires
Rear: 18x9.5" ET58 with 265/35-18 tires
  • Direct fit with stock suspension, lowering springs, and a variety of aftermarket coilovers. 5mm front spacers required for certain aftermarket suspensions.
  • 245/35-18 front tires can fit with 5mm front spacers and approximately -1.5 degrees of camber or more. Larger front spacers may be required for certain aftermarket suspensions.
  • 255/35-18 front tires can fit with 5mm front spacers and approximately -2.5 degrees of camber or more. Larger front spacers may be required for certain aftermarket suspensions.
  • 275/35-18 rear tires can be used with negative camber and/or rolled fenders.
To control the amount of power you'll be putting down, I would recommend 275 tires in the rear in a stickier compound. That may require a heavier fender roll and negative rear camber, but would be the best solution utilizing your stock fenders.

Feel free to PM us if you have any questions on the best setup for you!

-Matt
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      10-03-2019, 05:05 PM   #4
ivangene
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Front: 18x8.5" ET45 with 235/40-18 tires
Rear: 18x9.5" ET58 with 265/35-18 tires

this is a good fit for M sport coupe 135i 2013?
I want a little bigger but no mods, Im going to put sticky tires on it and go drive lapping days - no street for these

Thanks in advance for the replies
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      10-03-2019, 05:53 PM   #5
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Quote:
Originally Posted by ivangene View Post
Front: 18x8.5" ET45 with 235/40-18 tires
Rear: 18x9.5" ET58 with 265/35-18 tires

this is a good fit for M sport coupe 135i 2013?
I want a little bigger but no mods, Im going to put sticky tires on it and go drive lapping days - no street for these

Thanks in advance for the replies
This would be a perfect fit for an M-Sport 135i and would not require additional modifications unless using certain coilovers which may require front spacers.

Wider tires can also be used with front camber plates installed and rolled rear fenders.

For example:

Front: 18x8.5" ET45 with 245/35-18 tires
Rear: 18x9.5" ET58 with 275/35-18 tires
- Front 5mm spacers required with stock suspension or lowering springs, certain aftermarket coilovers will need larger spacers.
- Front negative camber required
- Rolled rear fenders required to prevent rubbing.

This setup is worth it if the car spends more time on the track than the street, since it does require aggressive front negative camber and a pretty heavy fender roll on the rear. If the car spends more time on the street, I'd go with the previously recommend 235/265 tire setup since it allows for a much more street-friendly camber setting up front.

--Dylan
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      10-04-2019, 12:26 PM   #6
ivangene
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Thank you so much - as long as I've been tinkering with cars and had so many wheel sets I still struggle and its great to have a solid number to shoot for.
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      10-04-2019, 03:12 PM   #7
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Can attest that 275/35/18 is possible with zero rubbing on the 9.5et58 EC7 even lowered by an inch and with -1.8 degrees camber.

BUT... BUT..

I have a heavy rear roll and have cut out and dremeled a fair amount of metal and plastic where the bumper and fender meet.

If you don't want to cut/roll, stick with 265 to be safe.
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