About Tires

[Landon]

Hello everyone!

I have questions about tires. Right now, the tires on my Sport model got a 45 wall thickness (245 / 45 / 18). If I put 19" wheels on the Sport model, would the height of the car move up? And would using a wall thickness of 30 or low profile tires help to keep the height of the car the same? My Z got an 18" wheels and I am looking to replace the 18" wheels with 19" wheels. I am wondering if the car will move up in height because of the 19" wheels.

Thanks!

 

[Darkhorse]

It depends on what size tyre you choose. There are calculators that will help you figure this out, such as https://www.1010tires.com/Tools/Tire-Size-Calculator

For example, If you switched to my wheels and tyres, you would see a fraction of an inch increase in overall diameter (255/40/19 & 285/35/19) which would not be noticeable. Here are all the numbers for that conversion - https://www.1010tires.com/Tools/Tire-Size-Calculator/245-45R18/255-40R19/285-35R19?ismetric=False

 

[Landon]

I bought a set of wheels and I have another question about front tires. For the front wheels which is 19"x9.5" with the Offset of 22. What is the best size tires for these wheels:

- 255 / 35 / 19

- 265 / 35 / 19


The 255 and 265 are the 2 options that I can put on my 19" front wheels. Would a 265 poke out of the front fender a little with the Offset of 22? Or would the 255 be more flush to the front fender with the 22 Offset?

Also, would the wall side of the wheel lower the car a little more if I went with the 30 instead of the 35? What if I went with this rout:

255 / 30 / 19


Would 255 / 30 / 19 look more flush to the front fenders and lower the car a little bit more?

Thanks for any advice!

 

[Darkhorse]

It's a bit subjective, but I don't think either of those options are "best". It depends on the brand of tyre and personal preference, but either will fit well enough. 255/35 will have a very slight stretch and 265/35 will have a very slight bulge to them. Different manufactures have different sidewall designs which will also come into play. What brand tyres are you looking at?

Here is a 265/40 PS4 on a 9.5. This has a 1.17% larger diameter than the OEM 255/40. This wheel also sits 10mm further out than stock, while yours will sit out 18mm further. This size tyre will work well on your wheels, as will 255/40.

Consider that when compared to the OEM tyre, your 265/35 option however will have a 2.69% smaller diameter and the 255/35 will be 3.71% smaller. The lower profile 255/30 will have a significant 7.43% smaller diameter and I think that is too much. These smaller diameters will lower your ride height slightly

I think you should go with 255/40 or 265/40, they will sit nicely and look good, you wont have clearance issues and they won't poke. If you want to go lower profile, go for the 265/35 option, the others are just too small.

Have a look at the numbers in this tyre size comparison calculator, in particular the sidewall height and speed variance figures.

https://www.1010tires.com/Tools/Tir.../255-35R19/255-30R19/265-40R19?ismetric=False

 

[Landon]

It's a bit subjective, but I don't think either of those options are "best". It depends on the brand of tyre and personal preference, but either will fit well enough. 255/35 will have a very slight stretch and 265/35 will have a very slight bulge to them. Different manufactures have different sidewall designs which will also come into play. What brand tyres are you looking at?

Here is a 265/40 PS4 on a 9.5. This has a 1.17% larger diameter than the OEM 255/40. This wheel also sits 10mm further out than stock, while yours will sit out 18mm further. This size tyre will work well on your wheels, as will 255/40.

Consider that when compared to the OEM tyre, your 265/35 option however will have a 2.69% smaller diameter and the 255/35 will be 3.71% smaller. The lower profile 255/30 will have a significant 7.43% smaller diameter and I think that is too much. These smaller diameters will lower your ride height slightly

I think you should go with 255/40 or 265/40, they will sit nicely and look good, you wont have clearance issues and they won't poke. If you want to go lower profile, go for the 265/35 option, the others are just too small.

Have a look at the numbers in this tyre size comparison calculator, in particular the sidewall height and speed variance figures.

https://www.1010tires.com/Tools/Tir.../255-35R19/255-30R19/265-40R19?ismetric=False

I just got back from a tire shop and they told me I should have the same wheel size and the same tire size as the stock Nismo. So below is what I ended up buying:

FRONT: 255/40/19

BACK: 285/35/19

They told me by getting the front tires 265/35/19 will throw the car off balance. And the height of the should be the same and won't notice any difference between 35 or 40 tire wall thickness.

Now that I am home and looking at the brochure of the Nismo, they were right. I just thought it was strange that the wall for the front tire is 40 and the wall for the back tire is 35 on the Nismo. I thought the Nismo front end would stick up higher than the back end, which would look funny.

 

[Jah_Happy]

I just got back from a tire shop and they told me I should have the same wheel size and the same tire size as the stock Nismo. So below is what I ended up buying:

FRONT: 255/40/19

BACK: 285/35/19

They told me by getting the front tires 265/35/19 will throw the car off balance. And the height of the should be the same and won't notice any difference between 35 or 40 tire wall thickness.

Now that I am home and looking at the brochure of the Nismo, they were right. I just thought it was strange that the wall for the front tire is 40 and the wall for the back tire is 35 on the Nismo. I thought the Nismo front end would stick up higher than the back end, which would look funny.

You can go 265 in the front no prob, my alignment specs came out surprisingly well even without camber arms. Once i add arms itll be dialed.

 

[Landon]

You can go 265 in the front no prob, my alignment specs came out surprisingly well even without camber arms. Once i add arms itll be dialed.

What they were really trying to tell me is "NOT F***" with the engineering from NISSAN. ha ha ha

They kept warning me about putting wider tires for the front that I got scared and had no choice but to listen to them. Since I am not an Engineer and don't know shit about wheels or tires, I had no choice but to shut up and listen to what they had to say. ha ha ha

They were scaring me man! ha ha ha

 

[bpeckham]

Now that I am home and looking at the brochure of the Nismo, they were right. I just thought it was strange that the wall for the front tire is 40 and the wall for the back tire is 35 on the Nismo. I thought the Nismo front end would stick up higher than the back end, which would look funny.

I found this Edmund's web page to be a pretty good intro on tire sizes.

The 35 and 40 represent the ratio of the tire's sidewall dimension to the tire width, so a 255/40 would have a 102mm sidewall, and a 275/35 would have a 96mm sidewall (stock sizes on the Performance trim). Indeed the front tires have a slightly bigger sidewall.

What I'm a bit unsure on is how accurate the ratio (or even the width) is. You really only see these in increments of five, and I sometimes wonder if it's just an approximation.

The thing that I find hilarious is that the diameter is measured using inches and the width is measured using millimeters.

 

[Jah_Happy]

What they were really trying to tell me is "NOT F***" with the engineering from NISSAN. ha ha ha

They kept warning me about putting wider tires for the front that I got scared and had no choice but to listen to them. Since I am not an Engineer and don't know shit about wheels or tires, I had no choice but to shut up and listen to what they had to say. ha ha ha

They were scaring me man! ha ha ha

You're all good, both setups are totally fine. I went wider to get a more flush look without spacers. Enjoy your new shoes!

 

[saltyz]

what tire size did you go with for the rears?

It's a bit subjective, but I don't think either of those options are "best". It depends on the brand of tyre and personal preference, but either will fit well enough. 255/35 will have a very slight stretch and 265/35 will have a very slight bulge to them. Different manufactures have different sidewall designs which will also come into play. What brand tyres are you looking at?

Here is a 265/40 PS4 on a 9.5. This has a 1.17% larger diameter than the OEM 255/40. This wheel also sits 10mm further out than stock, while yours will sit out 18mm further. This size tyre will work well on your wheels, as will 255/40.

Consider that when compared to the OEM tyre, your 265/35 option however will have a 2.69% smaller diameter and the 255/35 will be 3.71% smaller. The lower profile 255/30 will have a significant 7.43% smaller diameter and I think that is too much. These smaller diameters will lower your ride height slightly

I think you should go with 255/40 or 265/40, they will sit nicely and look good, you wont have clearance issues and they won't poke. If you want to go lower profile, go for the 265/35 option, the others are just too small.

Have a look at the numbers in this tyre size comparison calculator, in particular the sidewall height and speed variance figures.

https://www.1010tires.com/Tools/Tir.../255-35R19/255-30R19/265-40R19?ismetric=False

 

[T3R5Z]

I found this Edmund's web page to be a pretty good intro on tire sizes.

The 35 and 40 represent the ratio of the tire's sidewall dimension to the tire width, so a 255/40 would have a 102mm sidewall, and a 275/35 would have a 96mm sidewall (stock sizes on the Performance trim). Indeed the front tires have a slightly bigger sidewall.

What I'm a bit unsure on is how accurate the ratio (or even the width) is. You really only see these in increments of five, and I sometimes wonder if it's just an approximation.

The thing that I find hilarious is that the diameter is measured using inches and the width is measured using millimeters.

Total diameter is:
255/40r19 = 27.03" (687 mm)
265/35r19 = 26.30" (668 mm)

So running the 265 will make the front of the car sit abit lower and indeed throw off the "engineered" balance. Could make the front heavier and cause more understeer ect...

Has anyone chucked on new tyres on their OEM rims? I just had a exhaust and intake no tune and I'm going sideways when I hit boost in 2nd gear