the dimensions- 17*???? (you know, like 17*10 1/2, etc..)

www.ironpumping.com
^^Bodybuilding Made Simple

 

Owner's Manual, page 10-8.

Actually, since I've asked this question too while in possession of the holy Owner's Manual, I'll offer penance by setting them out here:

Sedan 16s: 16x6.5 (40mm offset)
Sedan 17s: 17x7.0 (45mm)

Coupe 17s: 17x7.5 (30mm) front, 17x8.0 (33mm) rear
Coupe 18s: 18x8.0 (30mm)

-Jack
Obsidian/graphite '03 Coupe premium nav

 

Note that on the Sedan, both the standard 6-spoke and the sport 5-spoke 17" rims are 7.0" wide, though the sport 5-spoke rims are, ironically, heavier.

2003.5 G35 Sedan Desert Platinum/Graphite Premium/Sport/Aero/Nav/Winter