Question about offsets

[Duster]

I currently have 18X10 et52 rear wheels with 7mm spacers, which reduces my offset to 45. The tires that I have on the wheels are 265/35. Can I go with larger tires, like 275/35 or 285/30 without rubbing the struts or fenders?

Here are the tires:
Toyo Proxes T1R 285/30/18 have an overall tire width of 11.2

or

Toyo T1R 275/35/18 have an overall tire width of 10.7

I have a MY00 Boxster with the standard suspension, however I may upgrade to the M050 ROW set-up later.