will i have any problems fitting a 335 tire on a 10" wheel on a 03 gt.its lowered with steeda sport springs.most likely ill be going with a nitto drag radial as its the cheapest in that tire size.
I wouldn't go bigger than 315 even if it fits it will cause the tire to crown and wear in the center you will also not have the full tread pattern on the road. If you really want a 335 go 10.5 to 11 inch.