Ok, first it depends on the spoke design, how wide the wheels are and other factors. Not knowing the wheel width makes the offset irrelevent (if I remember correctly). I assume you are using the stock brakes and if so I think you will be fine, but you will just have to mount one and find out really. I run 17x7.5 +38 and its really close. When in doubt though, use this wonderful guide put together by another member.
click I have found though that the only way to really tell is bolt em up. Good luck /ubbthreads/images/graemlins/cool.gif
-shamus