I'm looking for comments on mounting aluminum wheels designed for 740 hubs (designed for 12mm studs) onto 240 hubs (which have 1/2" studs). Some suggest that the 1/2" conical lug nuts don't seat deep enough into the conical depressions of the 740 wheels that were intended for 12mm lug nuts.

Has anyone installed 740 aluminum wheels on a 240 using standard 1/2" lug nuts without having problems? Specifically, I'm intending to mount Draco rims on my 240.

I've been told that the same problem does not exist when installing 740 steel wheels on a 240, because the conical depression in the 740 steel wheels is wider than on the aluminum wheels.


This relates to another post I did on Monday "Virgo vs. Draco wheels - which Volvos do they fit? 𖑀]". That post clarified which rims fit which cars (240/740/940) in regards to caliper clearance, etc. I just need to know if the lug nut discrepancy is a serious issue.