Need help with tire size decisions.
 

So I am 90% sure on the rims I am going with.

Option 1:

20x9 +23 in front and
20x11 +28 in the rear

I have been playing around with a tire calculator and came up with these number.

Please let me know if these sizes look OK. (I don't want the tires to stick out past the fenders, at least no more then a few mm.)

Front 235/35 (this will lower the front by 7 mm - not ideal)
Rear 295/30 (this will raise the back by 11mm)

Is it OK to lower the front and raise the back like that?
Or should I go with 235/40 up front (raising the front by 17mm)?

Option 2.

20x9 +32 in front and
20x10.5 +15 in the rear

Front 245/35 (this will raise the front by 1 mm)
Rear 275/30 (this will drop the back by 1 mm)

Option 3.


20x9 +32 in front and
20x10.5 +25 in the rear

Front 245/35 (this will raise the front by 1 mm)
Rear 285/30 (this will raise the back by 5 mm)

Any feedback on these set ups would be appreciated.



.

Option 2 is closest to what I have. Back is flush, front sticks out a hair. Tho my wheel up front is 20x9 +20. Rears are perfectly flush (no spacers)

20x9 +20
20x10.5 +27

245/35/20 Fronts
285/30/20 Rears

My measurements. Rear flush, front flush except a tiny little peek at the front.

use excel next time not a calculator, cooltoy. :icon17:

go with opt3 if you're not going to lower

Of course i am going to lower it via swifts

Thank you.

I guess I should add, that I will stay stock height most likely. to start with anyway.

When you say +20 sticks out are you talking about the wheel or the tire?

My calculations show that with +20 the wheel should stick out 3 mm and the tire 11 mm.

That would be the CV-2.

So running +40 up front is not advised?

The tire sticks out a few mm. Let me see if I have a picture of it

Best I got for now. Stock height.

One more

That looks about like what I figured (and ketchan told me about), that's why I think I will go with +32. Not as concave, but will be closer to the way the rear looks.

yah ET20 will stick out too much on a 9"

here's the profile. i just put it together just now. check the total diameter

http://www.the370z.com/members/kench...51-capture.jpg

so from the above your best choices are:

245/35/20 and 285/30/20

That kind of sucks that I will not be able to get the rims I want (option 1).

CV-2's it is then.

cv2's are great looking wheels. are you getting the dark ones?

Silver, not into dark rims.

I don't even like the way the stock ones look from a distance. Up close they are nice.