wheel offset

[taz1966]

Hi,
Will a 8.5jx19 with an ET of 38 stick out to much on the Z4M

 

[Mr Tidy]

No, if anything it will sit further in than the standard 224 rear wheel as that is 9J x 18 ET30.

 

[mmm-five]

If it's for the rear (OE is 255/40r18 et30) - a bit too close to the strut for me:
https://www.willtheyfit.com/index.php?width=255&aspect=40&diameter=18&wheelwidth=9&offset=30&width2=255&aspect2=40&wheel_size=18&wheel_width=8.5&offset2=38

If it's for the front (OE is 225/45r18 et42) - it's almost identical:
https://www.willtheyfit.com/index.php?width=225&aspect=45&diameter=18&wheelwidth=8&offset=42&width2=225&aspect2=45&wheel_size=18&wheel_width=8.5&offset2=38

My other concern would be the extra inch to 19" from 18", as the wrong tyre size could cause more fouling.

 

[plenty]

https://www.zpost.com/forums/showthread.php?t=87131

https://apexwheels.com/fitment-guides/bmw/z4-m/bmw-e85-e86-z4-m-wheel-and-tire-fitment-guide

Short answer is think you'll be ok if you stick to a 245/35 or 245/40 profile tyre. (Assume you're referring to front axle.)

 

[j3nks79]

Must be talking about the front.
They will fit just fine

 

[taz1966]

sorry for the late replies.
Yes it is for the front
Rears are 265X30X19 AND ET 33