today I unfortunately learned, that the outlaw rims of fifteen52, sizes nice for a 964, do not have the german TUEV approval, thus are not allowed to use according to the law. You would loose the complete approval and insurance for you car, if you do act otherwise.

The reason for not getting the approval had been the missing stiffness and solidity of the rims.
In other words, the would break into pieces, if the TUEV test would be done!!!

Also I learned them being far too heavy in comparison to the original light weight Fuchs, about 1/3 plus per rim.

fifteen52 does not intend to apply for approval as they would have to test every size in every diameter and width.
The only outlaw rims approved are the "small ones" for the G model/930, standard replacement.