[Gran_Turismo]

Hi does anyone know if I can run this set-up without any modifications or much sacrifice to ride performance?

Front rim size: 18x8"
Rear rim size: 18x8.5"
Bolt pattern: 5x120
Front offset: 29mm
Rear offset: 40mm
Tire size: 225/40R18 92V Extra Load M+S

[BNTLY]

I’d want more sidewalll, 225/50/18 would be preferred if your set in 18s.

[Billfitz]

Agreed, 40 series tires is begging for pothole damage to tires and rims. Not that there are any potholes in NYC...

I specifically went with 225-55/17s to lessen the risk of tire and rim damage on my yearly NYC Broadway Show trip. The last thing I need is to be looking for tires and/or rims on a Sunday 300 miles from home.

[Gran_Turismo]

Thanks for the suggestions! These wheels are z4 wheels, you guys know if that offset would work with f34?

[rambleon84]

Originally Posted by Gran_Turismo

Thanks for the suggestions! These wheels are z4 wheels, you guys know if that offset would work with f34?

stock wheel for the staggered 400m size is:
18x8" ET34
18x8.5" ET47

so 5mm more poke up front and 7 in the rear, shouldnt be an issue

[Gran_Turismo]

Anyone know if we can run 16" wheels without a problem?

[Billfitz]

They might not fit with MSport brakes.

[rambleon84]

Enter your make/model into tirerack, they should be accurate: https://www.tirerack.com

Depends if you have the msport with standard brakes or the msport brakes... A 328 with single piston front brakes would max out with a 330mm rotor (~13") and should fit on 16's (per tirerack.) Unpainted/blue 4 pistons calipers up front are 340mm and tirerack says those can only handle 17" wheels as the smallest. Bigger than that msport brakes need 18" as the min