Moin, my name is René and I recently bought a 630i convertible. So far I have been on the road with the Sterngemeinde and therefore BMW is new ground for me. I have the following questions about possible winter tyres: I find the BMW 18 inch rim “M double spoke 184” quite handsome and would like to drive it in the winter. However, I find only contradictory sources online – some say only for M6 and others say mobile on all E63/E64. A BMW dealer around the corner says also only for M-Mod elle (because the computer didn’t show the rim as an accessory for my chassis number – why it doesn’t fit, but he couldn’t explain it to me). Can someone tell me why this rim should only be for M-models – is this due to another hole circle or other screws e.g. M14 instead of M12??? The basic data of the rim 8×18 ET14 should actually fit. The BMW catalog in the attached picture says the rim is not for M6 – in another overview again only for M – who kan There are also three links of the corresponding offers – here too it is partly assumed that these should only be for the M-models.http://www.ebay.de/…/172900362346?…http://www.ebay.de/…/282693945777?… (I know this would not fit the cross-section)https://www.ebay-kleinanzeigen.de/…/720542130-223-2893 Then a question about this offer:http://www.ebay.de/…/352163693069?… Despite different rim sizes on the VA and HA are mounted here around 255/40 – actually it should be 245/40 on 275/35. How can I find out if 255/40 would also be released or if someone knows if this is allowed Are there actually any tyre / rim approval lists for the BMW models available online – so for BMW original rims of course! Thank you in advance for your help. VG René