Black Mammoth

I probably should have put this in the Wheels & Tyre forum. Sorry about that guys.

Greetings from the US. I'm a newbie so please forgive me. I tried searching on here, but didn't have much luck. My father has a set of 17" SSR Integrals on his 98 GS 300. I was trying to figure out what the offset and centrebore. I would like to put these on my 300 TT Z. I know that the bolt pattern is the same. I just need the rest of the info :) Sorry for the newbie question. Thanks in advanced.