are there any advantages/disadvantages of running 19x 7.5 rims on the front and 19 x 8.5 on the rear?

19x7.5 (225/35/19)is the largest size i would put on the front end of an IS but 8.5(225/30/19 is fine on the rear.

...cheers L3XJG.

NO PROB'S

depending on offset,you may well need to get your rear arches rolled...........i had to with 18"

[quote][i]Originally posted by L3X JG[/i]
19x7.5 (225/35/19)is the largest size i would put on the front end of an IS but 8.5(225/30/19 is fine on the rear.[/quote]

Huh ?? Bigger tyres on front than rear ? Odd ..... :?:

maybe 255/35/19 rear

i have 255/35/18 rear
225/40/18 front

[quote]depending on offset,you may well need to get your rear arches rolled...........i had to with 18"[/quote]

... great!, another factor into the equation!!!:(