Hey Iv got a 740 turbo Volvo and I am wondering if someone can give me the dimensions of the rims that will fit as I live in Australian and no one really has a clue what there talking about , all I know is because it's turboed the front callipers are bigger and require 15s as I tried putting 14 off a non-turbo Volvo on,
is there a specific Volvo rim thats needed to fit?

 

If you have the same rim that I do, the dimensions should be 15 x 6 inches with a 5 x 4.25 inch bolt pattern, if I remember correctly.
What year is the car?

 

be sure to get the correct offset wheels, too.

My 740T had Hydras, which are 6.5 x 16" with ET25. I believe the stock 6.0x15 wheels are also ET25