Nissan 370Z Forum - View Single Post - Choose my wheel + tire setup...because I cannot.

fairladyATX · 03-14-2023, 06:22 PM

The Z is a weekend car and sees the race track 3-4 times/year.

I have a track weekend in 2 weeks and am stuck deciding on what wheels and tires to use.

I've reached the point of analysis paralysis from searching the forum and am confusing myself at this point...would love your input.

I've previously run the stock Rays on PS4S and the car does understeer and when the tires get too hot, they get slippery fast. They started to chunk on my last weekend, so those tires are shot.

I really wanted to run a square-ish setup with Hankook Ventus RS4s (or another 200TW tire), but that seems tricky.

Wheel Set 1 - Stock Rays

Wheel Set 2 - Forgestar F14s w/ new PS4S

Front: 19x9.5 20mm offset, with 255/35/19
Rear: 19x11 15mm offset with 305/30/19

Car is lowered on Eibach Pros: 0.9" front / 0.8" rear. The rest of suspension is stock, except for Whiteline front sway.

Here's what I *THINK* my options are:

1) Run the Forgestars, as is. Expect more understeer since the tires that are on it are 255f/305r. (But maybe more grip overall since the tires are new vs. the old worn ones I was using?)

2) Run the Forgestars, but swap the 255 fronts for 275/35s PS4S. This should, in theory, reduce understeer and be more neutral. I think 275s is the max width tire for a 9.5in wheel.

3) Take off the PS4S, put them on the Rays (if they fit). Get 200TW set for the Forgestars, but TireRack/Discount only has 275/35s in stock for the RS4s. No 305s. So I need another 200TW option.

4) Run the Stock Rays, and run 275/35s RS4's all around. (But I couldn't find a definitive answer if 275s fit on the front Rays, and if I'd need to also get a spacer).

I think option #2 probably makes the most sense, I just know even Michelin says the PS4S isn't a track tire and since I have two sets of wheels, I might as well see if I can make a decent track setup out of one, and keep a good set of PS4S's for the street.

Definitely overthinking this now....what do you guys think?

03-14-2023, 06:22 PM	#1 (permalink)
fairladyATX Base Member Join Date: May 2021 Location: Austin, TX Posts: 123 Drives: 14 370z Sport M6 Rep Power: 4	Choose my wheel + tire setup...because I cannot. The Z is a weekend car and sees the race track 3-4 times/year. I have a track weekend in 2 weeks and am stuck deciding on what wheels and tires to use. I've reached the point of analysis paralysis from searching the forum and am confusing myself at this point...would love your input. I've previously run the stock Rays on PS4S and the car does understeer and when the tires get too hot, they get slippery fast. They started to chunk on my last weekend, so those tires are shot. I really wanted to run a square-ish setup with Hankook Ventus RS4s (or another 200TW tire), but that seems tricky. Wheel Set 1 - Stock Rays Wheel Set 2 - Forgestar F14s w/ new PS4S Front: 19x9.5 20mm offset, with 255/35/19 Rear: 19x11 15mm offset with 305/30/19 Car is lowered on Eibach Pros: 0.9" front / 0.8" rear. The rest of suspension is stock, except for Whiteline front sway. Here's what I THINK my options are: 1) Run the Forgestars, as is. Expect more understeer since the tires that are on it are 255f/305r. (But maybe more grip overall since the tires are new vs. the old worn ones I was using?) 2) Run the Forgestars, but swap the 255 fronts for 275/35s PS4S. This should, in theory, reduce understeer and be more neutral. I think 275s is the max width tire for a 9.5in wheel. 3) Take off the PS4S, put them on the Rays (if they fit). Get 200TW set for the Forgestars, but TireRack/Discount only has 275/35s in stock for the RS4s. No 305s. So I need another 200TW option. 4) Run the Stock Rays, and run 275/35s RS4's all around. (But I couldn't find a definitive answer if 275s fit on the front Rays, and if I'd need to also get a spacer). I think option #2 probably makes the most sense, I just know even Michelin says the PS4S isn't a track tire and since I have two sets of wheels, I might as well see if I can make a decent track setup out of one, and keep a good set of PS4S's for the street. Definitely overthinking this now....what do you guys think? __________________ "Casual" track car...NASA TX.