If you read the original m3post thread, there’s a lot of interest false information that ADV1 posts including TUV Certification and cause of the crack.  Read yourself!

http://www.m3post.com/forums/showthread.php?t=664569

http://www.nagtroc.org/forums/index.php?/topic/68083-adv1-wheel-failure-cracked-wheels/

http://www.6speedonline.com/forums/996-turbo-gt2/271239-adv1-cracked-wheel-failure-just-fyi.html