Definitive answer on wheels sizes?

[jayjay]

ahh, but it's not directly proportional.. in fact, keeping the same offset whilst increasing the wheel width increases the amount of poke on the inside, as in, it reduces the clearance toward the suspension strut

[RhysQ]

ah i see....i understand now....cheers guys!

[Chipped]

Ah so the definitive answer is.
If my current 16 x 6.5 with a 43mm ET are replaced with a 17 x 7 with ET48mm, my wheel would poke out 5mm from the original wheels? Which would not be a problem?