[Majolo71]

I promise I looked, I haven’t seen this question asked, I apologize if it has.

2019 440i xDrive Msport on 400m’s 18” square, bone stock. I want to put Apex ARC-8’s wrapped in Michelin Pilot Sport all seasons on it. I plan to keep the car a long time, it only gets driven a few thousand miles a year, and I like to keep things as close to stock as possible. My question is what width and offset should the wheels be, keeping with a square setup and stock tire size?

[alohasurftoad]

Originally Posted by Majolo71

2019 440i xDrive Msport on 400m’s 18” square, bone stock. I want to put Apex ARC-8’s wrapped in Michelin Pilot Sport all seasons on it. I plan to keep the car a long time, it only gets driven a few thousand miles a year, and I like to keep things as close to stock as possible. My question is what width and offset should the wheels be, keeping with a square setup and stock tire size?

if you're only going to run 225 width square then 8.5" ET35.

imo, 225's are narrow for B58 power. i'd increase to a wider square or staggered setup to make the upgrade worthwhile.

[White435]

I just installed square set of 18x9 513M's paired with 255/40 tires on my xDrive 435i. I'm lowered on KW Street Comfort coilovers and there is no rub even on full lock or hard cornering.

[Majolo71]

Originally Posted by alohasurftoad

if you're only going to run 225 width square then 8.5" ET35.

imo, 225's are narrow for B58 power. i'd increase to a wider square or staggered setup to make the upgrade worthwhile.

What tire size would you recommend?

[alohasurftoad]

Originally Posted by Majolo71

What tire size would you recommend?

i'm assuming you want square?

option1, 235/45/18 square, conservative increase and what i'd do @ the very minimum. link below shows Solidjake with 235/45/18 on 18x8.5 ET35 apex sm-10
https://f30.bimmerpost.com/forums/sh...35&postcount=6

option2, 255/40/18 square. link below has Polo08816 with 255/40/18 on 18x8.5 ET38 Apex Arc-8. if you get ET35 it will be 3mm more flush than ET38. either offset is fine, though.
https://f30.bimmerpost.com/forums/sh...83&postcount=4

option3, 255/40/18 square on 18x9.5 ET35, modestly aggressive. compared to 8.5", 9.5" is more concave, which i prefer. link has Tato with 255/40/18 on 18x9.5 ET35 Apex VS-5RS
https://f30.bimmerpost.com/forums/sh...&postcount=460

maybe for you i'd do option2 is safest, decent increase but not too crazy. i prefer deeper concavity so i would do option3, personally.

[Majolo71]

Thank you!