g'day all...been told that i cant put 20's under my ba without changing profiles and widths from front to rear .same profiles and widths front and rear and the fronts will hit control arms or other components . has anyone had the same response? and can it be done?{they say xr8 and typhoon have bigger guard clearance} i would rather keep the same profile and widths in tyre the same front and rear....2005 xr6 ba mk2 sedan i;am talking about? currently running 245/40X18;s front and rear........................
cheers....ken....

245/30R20

yeah mate 20" is the biggest you can go
and what 67RCE said on size