[smuudge2020]

Hello everyone! We’ve had our 2011 320i M sport convertible for coming up 3 years and recently the rear left alloy has been suffering with cracks (repeatedly ) I’ve now had them welded 4-5 times so I’m going to have to bite the bullet and get a replacement 313 19” or maybe a complete set of 18s that might fair better on our lovely roads! My question is do the 4 series M Sport alloys (18” 400m style for instance ) have the same fitment as my e93? Anyone fitted anything similar?

[therealdb1]

Why don't you look on the 4 forum

e.g. https://f30.bimmerpost.com/forums/sh...d.php?t=685033

which gives you the 400M fitment to compare with your E93 wheels?

[smuudge2020]

Cheers. Ive headed over there, I believe they have the same stud pattern, just need to know if they sit ok. cant see any pix of a E90 wearing 400M's anywhere ..

[aaronblack]

https://www.e90post.com/forums/showthread.php?t=985347

It's a E90 but gives you an idea. As mentioned you probably will need spacers.

[Finngo]

Originally Posted by aaronblack

https://www.e90post.com/forums/showthread.php?t=985347

It's a E90 but gives you an idea. As mentioned you probably will need spacers.

+1

[smuudge2020]

Thanks. So they fit, I just need to make sure the tyres aren't going to cause issues now.

The 400Ms I am looking at buying come with

255 x 40 x 18 rears
225 x 45 x 18 fronts.

I have a feeling these tyres will rub..

I did a size comparison and it makes the circumference of the tyre/wheel combo larger front and back than the current 19" 313s.

Any advice much appreciated.

[aaronblack]

Originally Posted by smuudge2020

Thanks. So they fit, I just need to make sure the tyres aren't going to cause issues now.

The 400Ms I am looking at buying come with

255 x 40 x 18 rears
225 x 45 x 18 fronts.

I have a feeling these tyres will rub..

I did a size comparison and it makes the circumference of the tyre/wheel combo larger front and back than the current 19" 313s.

Any advice much appreciated.

I've quickly had a look and for a E92 maybe E93 the front offset is ok however the back is too far in so you'll need at least 10mm spacers.

The wheels you looking at are:

18x8 ET34
18x8.5 ET47

For reference my stock 19's are:
19x8 ET 37
19x9 ET 39

So as you can see front is ok for my setup as it will come out a little (3mm) but the back is too far in (14mm) so minimum it needs 10mm spacers.

Do what I did above with your current wheels setup and put it into a offset calculator. It should be fairly simple

[aaronblack]

Sorry completely misunderstood the question, yes those tyres do seem bigger than standard which are 225/40 and 255/35 hence your speedo will be out I think.