As the topic state. Anyone can tell me how?

 

Check on the inside of the wheel. If it's not there then you will have to measure it yourself.

 

Members must learn when asking questions to give as much information as possible:

OEM wheel?
What year?
Size?
After market wheels?
Photos are helpful.

None of us are mind readers. None of us have ESP. This is not a game where we coax answers out of you piece by piece.

 

It's was more like a general question. I didn't think it would really matter what the rims are/size and stuff. But here we go

Not OEM
2004 zR
19" .... Front 19" 8.5 Rear 19" 9.5 (that's what it said on the inside)
Yes After Market
No Photo of the rims at the time. Just when they were on my friend 300zx

 

This shows how the offset is measured.

http://www.tirerack.com/wheels/tech/...jsp?techid=101

I don't know if you can do this accurately while the wheel is mounted on the car.

--Spike

 

No way to tell just by looking. Sorry.

 

Most wheels I've come across (OK, all wheels I currently own) have got the offset cast into the wheel. It's usually on the back of one of the spokes, or on the inside on the hub face.