My BBS wheels needed longer bolts too.
Those though look ok, looks like you can see 7 threads on the bolts so I'd be happy with that.
Spoke to the person I bought them from and he said the bolts he used on his golf are 1 inch longer than standard? is that a 52mm total bolt length needed then? I definitely wont chance it with the standard bolts! I cant even get them in on the fronts, I trying to find some decent quality bolts, here's a pic of the bolt length on my other alloys:
I have BBS CH for the summer. 5x112, et 50. I had to buy longer bolts as the standard ones were too short. Only 3 turns until they were tight.