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[ESala0607]

Hi guys new to the forum and new 135i owner. I am looking to outfit my car with a set of custom forged wheels. Haven’t decided on monoblock, 2pc, 3pc or any specific details to the concave / convex shape of them.

If it’s not a matter of limits to the customizability of a wheel what would be the ideal size of an 18” wheel that will both fit a stock suspension and BMW Performance or Ohlins Road and Track setup without rubbing in any way.

I know this depends on quite a bit of things but I have the opportunity to get a set built and need some help. I’m totally up got changing directions whether it be flat face, deep, lip, welded.

Any positive suggestions or advice would be helpful. Thanks.

[MightyMouseTech]

Check the APEX site for recommended figments on our cars. They are as big as you can go without rubbing or fender mods.

[TboneS54]

You'd need to know wheel widths before you can decide on offsets. You may even need to know which exact tires first, if you wanted super flush fitment.

A good place to start is the standard widths/offsets for Apex like Mighty mentioned ^.

18x8.5" et 45 iirc. Seems like the front can handle a lower offset than the rear, where there's more room inboard.

You going custom could really take advantage of that. Perhaps something like et40 front and et50 rear?

[ShocknAwe]

What size tires do you want to run? Are these all purpose, just for show, track, DD only, etc.

[Eyeman]

Yep, depends a little on what you plan to do with your car. Also a lower offset will often allow more of a concave look so that can be a factor. But for me if I were getting custom wheels I'd go 18x8.5et42 front, 18x9.5et 52rear.

[MN.BIMMER]

Originally Posted by Eyeman

Yep, depends a little on what you plan to do with your car. Also a lower offset will often allow more of a concave look so that can be a factor. But for me if I were getting custom wheels I'd go 18x8.5et42 front, 18x9.5et 52rear.

Why that offset vs what you have on your car now?

[ShocknAwe]

Hm. Tough.

For maximum tire is probably go for something like 18x9et42 and 18x10et55.

Then run 255 front and 275/35 or 285/30 rear tire. Would need a heavy fender roll and pull with trimming and probably around 2-2.5 degrees negative camber.

I know some folks who have done that can weigh in here.

[ESala0607]

Originally Posted by MN.BIMMER

Why that offset vs what you have on your car now?

Just found out that I can only get to a 9” width ET40 on Monoblocks. Should I forgo monos and go with a 2pc or 3pc as I can’t get to that?

[ShocknAwe]

Originally Posted by ESala0607

Just found out that I can only get to a 9” width ET40 on Monoblocks. Should I forgo monos and go with a 2pc or 3pc as I can’t get to that?

If you can do 9.5+ and higher than et40 on 2/3pc then definitely the answer is yes.

[Eyeman]

If you want a square setup front to rear, et40 is OK, otherwise you'll want a higher rear offset.

MN Bimmer, I basically do have et52 rears since I did the rear brake hub mod and so that added 7-8mm to my et45 rears.

[Expert@ApexWheels]

Thanks to everyone who mentioned us! Here is a direct link to our guide which should have some good info on offsets and tire sizing.

https://support.apexraceparts.com/hc...-Fitment-Guide

Good luck with the custom wheels!

-Tom