Tyre Sizes - Z4M OEM wheels - OEM CSLs

Daffy

Active member
 Bath
Have I got this right?

Original stock sizes on the standard ///M alloys were:

225/45/18 front
255/40/18 rear

and stock sizes on CSLs were:

235/35/19 front
265/30/19 rear

However, if I use the stock CSL sizes on the rear of the ///M, then the diametric difference is negative almost 19mm....is this correct? If so the better choice is 265/35/19, right?

:?
 
I was told when buying tyres that almost all people run 265/30/19. I made a topic about it somewhere.

I'm selling a full set of CSL sized tyres at the mo. Just uploading pictures now.
 
I've pointed this discrepancy out many times, but no-one seems to care :P

I'd personally go for the 265/35r19 as it's much closer to the original diameter.
 
I always assummed the tyre would rub, guess your right though the 35 is the better choice, will also improve the ride compliance ever so slightly.
 
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