Its about time my mk 3 got some decent wheels. Problem is I have no clue at all what I'm doing.

Currently I'm running on 4 stud steels. The tyre code is 175/70 R13 82T.
What the hell does 175/70 R13 82T relate to!? I assume one number relates to diameter of the wheel and one the depth. Does the stud size vary between cars or is that standard?
Basically I want to buy some alloys and bang em straight on without hassle. My golf is not lowered. Any suggestions?
I've got a load of possibles lined up that I like. Once I have a bit more of a clue what spec. I need I'll get on photoshop and get your opinions on the look
