Looking for fitment help on 20" wheels
 

Hi,

I have a 2019 Nismo complete stock except resonated short tails and 20mm spacers allround. I want to upgrade to 20" rims since i think the stock rims look a bit small and the tires a bit stretched but I don't want to lose the "girthy" look of having a bit of sidewall. I have read the fitment guide thread and I am quite familiar with wheel and tire geometry. However I still need some input in increasing the overall wheel size a bit so i can have 20s with a bit of sidewall (not so stretched) and also fill out the wheel well slightly more.

I have spent a bit of time on willtheyfit and I think theoretically what I want is:

F: 20x9 +35 with 245/40 R20
R: 20x11 +28 with 295/35 R20
The difference between front and back is then 1,49% which is below the 3% threshold and the offsets allows me to keep the 20mm spacers and still be at essentially the same flush fitment.

My plan is to later drop it on coils to compensate for the gained height due to the larger wheels.

So my questions are: is there anyone out there that runs this setup or a similar one? Will this be a bad idea and should i go for ratios 35 and 30 f/r respectively instead and why? Please help!

If you are considering purchasing aftermarket wheels, why on Earth would you choose such poor fitment? Your goal shouldn't be to find wheels that will look nice with 20mm spacers. You goal should be to find wheels that fit the way you want without spacers. And why would you run a narrower front wheel than your stocks?

My initial thought was to "play it safe" with the new wheels and keep the spacers so that I have the opportunity to adjust the fitment if I need to when lowering the car etc. It feels risky to go for the flush fitment when changing a lot of the parameters. But maybe thats just me being anxious.

As for the narrower wheel in the front, I really dont like how stretched they are, and I think that 245 is enough for the front, therefore going down .5 in wheel width seems like a reasonable thing to do since tire width and grip will stay the same. Why would that be a bad thing to do?

I suspect that you will regret playing it safe. Plus sizing wheels and tires is the perfect opportunity to improve appearance and performance. Rather than using spacers, find wider wheels and wider rubber. There are endless examples on this site of how owners accomplished this. Estimate how much drop you anticipate adding in the future and what kind of alignment specs you prefer.

When I first switched from stock to my 20's I had 245-35-20 and 285-30-20. It is pretty much flush. The tires did look a bit stretched.


Rims are:
20x9 +32 Front
20x10.5 +25 Rear


I am now running 255-35-20 and 295-30-20.


Tires are much more filled out.


Stock suspension. No spacers.

You need to read this thread:
http://www.the370z.com/wheels-tires/...tart-here.html

I have done all the work for you

For reference, I ran 20x11, +15 with a 275/30 in FRONT, so your rear sizing is . . . bad. You are doing it wrong. My thread will teach you how to do it right.

https://farm2.staticflickr.com/1953/...c6eeeaae_b.jpg

That might be the case, I'm going to go for a better fitment. Many wheels have a lot of ETs to chose from. But my main question was if anyone had the same rim and tire size so I could see how that looks in the wheel well. But thanks for your input!

correct that you will fill out the wheel well better, diameter wise....

But, this is relative to OEM size you have right now:

• Rear wheel - width is now +12.7mm (.5 inch wider), but tire is only +10mm (285 to 295). New rear will look ever so slightly more stretched.

• Front wheel - width will be -12.7mm (.5 inch narrower), but same tire width (245). New front will look beefier.

Front = more girth. Rear = same/negligibly less girth

Read. The. Thread.