BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)


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      06-24-2019, 10:24 AM   #1

Drives: 2008 135i manual
Join Date: Jul 2017
Location: Wisconsin

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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, 10:57 AM   #2
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Drives: 2008 135 blk, blk, step
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Location: Atlanta, GA

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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.
Injen, RR OCC, MadDad Whisper, donut spare, 19x8.5et43fr 19x9.5et45r Volk LE37's, rear fenders rolled/pulled, PSS4S 225/35fr PSS 255/30r, KW V1's, AR coated catless dps, Cross strutbar, CF grills and license plate holder, rearseat removal, iCarbon diffuser and front lip, ETS black anodized FMIC, M3 control arms, Quaife, ER chargepipe, ForgeDV's, Topspeed Custom Tune, V3sims, Braille, Andrey_GTA rear hub mod.
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      09-11-2019, 01:54 PM   #3
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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!

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