The car in the picture you attached is 18x10.5 (+15) w/235/40 tire in the rear, and 17×9.5 (-2 (20mm adapter)) up front w/215/45 Bridgestone Potenza tires
Thread: http://www.stancenation.com/2011/02/21/teenage-dream/
No need for people to post up pics here theres a whole thread below dedicated to offset etc...
http://www.skylinesaustralia.com/forums/topic/84208-wheel-sizes-offsets-for-skylines/