Who can tell me what offset wheel I need to fit 18x9.5 on the front and rear of my 350Z. I plan on running 265/35-18 tires all the way around. Thanks.

 

Conservative fittment would be anywhere from 18x9.5 et +20 to +30 front and rear.

You can fit as low as et +12 up front but may want to run a narrower tire (245/40/18).
The rear can fit an 18x9.5 et +5 with anything less than 275/40/18 tire.

 

Hey guys, I want to run 19x8.5 all the way around. What tire would you suggest? 265/35/19? Is anyone else running same size on all 4? What are the advantages and disadvantages of doing so? The wheels im looking at have a 35mm offset

 

That setup should work fine. You will notice slightly heavier steering with the wider front tires, and may want to get a power steering cooler (Nismo, Stillen, ARC, etc...) but the handling should be much improved over stock tire sizes.

Also the wheels will stick in the fenders a lot, like stock, so if you're looking for a more aggressive look (tires flush w/fender) then you should get slightly wider wheels, and lower offsets.