I got an 04 350z just installed widebody kit front fenders 50mm rear fender 100mm what size wheels and offset should I run.ohh and I will drive it so not a show car.

 

go measure and find out

 

go measure and find out

 

Search for specs you like, play with offet calc to get an outer lip placement 50 and 100mm farther out then what the stock body specs were

 

T-Rav and DeadEye lol...

 

This ^^^

Gotta weigh in here because this is clearly a case of "Hmmmm, guess maybe I shoulda thought about that beforehand."

Quick consult with the tire calculator shows you'll need something like these to fit the wells... and this is just educated conjecture (or "fact based hypotheses based on given information")

18x11 -10
18x13 -20

Based on those, tires would be something like:

285/35-18 Front
335/30-18 Rear

Substitute 19s in there if you want but the widths are the critical factor, which are based on a 1:1 wheel width to best-width correlation (based on offsets and available space).

But the takeaway here is that there are so many different ways to go with this if you play with the offsets and widths, e.g., "might/could be 18x12 and 18x13 if you re-do the offsets". Point is you need to do the calcs until you come up with a combination not only you like but are even available in the particular dimensions needed; and especially taking into consideration how much you're willing to put into it (read: $$$$).

Suffice to say that you have a lot of homework to do.... researching tires sizes, wheel sizes and availability, price range....and you're definitely in CUSTOM WHEEL sizing territory. Nothing off the shelf to fit your application (unless you're lucky enough to find a custom built set someone's selling).

Based in the above, back-of-the-napkin estimating about a $8k outlay for rolling stock.

Then, don't forget the other critical "supporting" issues like hub and bearing, brakes, suspension upgrades; all NECESSARY to support that much wheel/tire without rolling down the road and losing a wheel due to catastrophic hub failure.

No "slap 'em on and go" easy way out here. Body mods like that require a thorough PLAN, not just "put it one cuz it looks badass." Take a look at some of the radical builds on this site and look at what they've done.

 

I would definitely measure after the kit has been installed...