Wheel adapter diameter and bolt help

[HANENG18]

I'm getting some custom made adapters/spacers to fit some bbs quantum44 S1s.
What I'm wanting to know is the diameter I would need, the guy making them said they'll be 165mm⌀. I found these that say 128mm⌀ http://www.autodoc.co.uk/swag/2139791 is that right?
I'm using my standard wheel bolts to bolt the adapters to my hub. I have the locking wheel nuts off the car as the previous owner lost the key. They have a 60 degree taper and the widest part is 30mm. I'm just wondering if anyone knows if they're the same as the standard ds3 bolts? Just in case the previous owner gave me any old locking wheel bolts.

The adapters will have M12x1.5 pitch studs pressed from the back. I will then put nuts on the outside to attach the quantums to the adapters.

TLDR : what diameter should adapters be and are ds3 standard bolts 60 degree taper and less than 30mm diameter at widest part.

Any help would be great thanks!
-Harry

[cyclone]

For the diameter the stock hub you linked is 128mm with 4-108 bolt pitch. Now what you need to think about is what the wheels you are putting on are made for. I would assume a 5 bolt fitment and a bigger circle than than the DS3s. So you might need that 165mm for the new wheel stud pattern to work. Stock citroen bolts use a flat seat bolt. As your adaptors are being made they can make them to fit whatever bolt style you want.

[HANENG18]

Thanks cyclone! The new bolt pattern is 5x120 so yes the 165 should be fine. The bolts are the same so all is good. I'm using my existing wheel bolts for the adaptors.