Well the previous owner had put some TSW mags on my car.

Problem is front is 17 x 7 and rear is 18 x 7.5 with both offsets at 30 or 35.

Now its the winter season here in New Zealand and I need good wet tyres.

The front has 215 on them while the rear I think has 235 on them, all of them Toyo Proxes 4 or something

I was thinking of doing Good Year GSD3 225 front and 245 or 255 on the back.

Is this actually feasble on the car? Dont mind a little bit of the tyre sticking out or just lining the car.

Any suggestions would be greatly welcomed!

 

is your car lowered? 255's are pretty fat.

 

255s are a bad idea. Too wide for the wheel and not a good idea on that offset.
I was going to ask about the y in your tire, but I won't...lol

 

Well 245 then? Hydroplaned like crazy last night and im honestly wanting better tyres at the back.

No my car isnt lowered

 

Actually, hydroplaning can and will happen to your tires regardless of width. What's really funny is that the wider the tire, the more significant chance you have of hydroplaning. Think about it- there is more surface for the car to be able to lose contact with the ground. Lol- the narrowest tires do best in rain. Slap some 215s in back, lol.
If you want more hydroplaning resistance, pick up a tire that is proven in the rain. Like Goodyear Eagle F1 GS D3.