I have a 2004 350Z

It has Rota P45R 18x9.5 on all four corners

I have no idea what size tire to purchase for the rims. I really need some help with this one.

Thanks everyone!

 

what model is it? I would suggest a 245/40/18 for fronts and 265/40/18 for rears and the diameter difference would be around 2.4... But keep in mind that different manufactures measure their products differently as well.... GL

 

On 9½" wide wheels, you could easily run anything from 245 to 285 tires.

Does your car have TCS or VDC? If so, you'll need staggered tires, i.e. fronts shorter than rears.

This is where tire choice gets tricky. You want the OD of the fronts to be close to the OEM OD and the OD of the rears to be close to the OEM OD. You'll have to experiment with some widths and profiles to get you close to what you need.

For example, you could use 245/40/18 in front and 275/40/18 in the rear.

Remember that you can pick the same width front and rear and use a different profile. For example, 265/35/18 and 265/40/18.

 

^^^

hey dave i punched those#s in a tire calc and it said it was more the 3% OD... would that be a prob?

 

Which pair? The 245/275 combo are pretty much the "standard" upgrade. Check out this post...

https://my350z.com/forum/4936171-post42.html

The 265 example does push the limit with 1" of stagger on 26" diam. It's meant more as an sample than an actual recommended setup. One of the biggest problems in trying to do that setup is just finding tires with the same or similar widths and reasonable profiles.

OP - there are some inherent dangers in picking non-standard setups like the 265 example. The main one is that you lose some of the built-in understeer that the OEM staggered setup provides. Unless you understand what you're getting into, you probably should avoid that scenerio.

 

275/35 and 275/40 is also a nice combo , and 275/40 with 255/40 is another great conbo. If you want a staggered setup, i would do the 255 fronts over 245 cause the 255's won't look as stretched on the 9.5's and will match the rear better cause 275's won't be stretched at all.

 

^ he speaks the truth ^

 

Plenty of recommendations here.

 

Depends on the wheel offsets.

 

A nice setup for a daily driven 350Z is 245/40/18 or 255/40/18 front and 275/40/18 rear. This setup will fit well and perform great


Here's how a 245/40/18 and 275/40/18 setup looks (featured on the 18x9.5 +22 Rota DPT non staggered setup, pictures courtesy of forum member Zazz93)




Here's how a 255/40/18 and 275/40/18 setup looks (featured on the 18x9.5 +20 Rota P45R non staggered setup, pictures courtesy of forum member Cambo350Z)




-Dan

 

You are welcome.