18's on a 370z
 

295/35. The 5 percent difference in aspect ratio between the 295 and 285 won't be that much different. If you go 295/30 in the rear your front tire setup might look more aggressive than the rear. As far as traction control goes. You're not in the range of having issues there. Please post pics when you get the new setup on as well.


What size tire are you running up front right now? 285/35 is pretty aggressive for the front!! I think dan was rubbing with 275/40 up front when he had his rpf1's but they poked a good bit.

Sent using thumbs

Great bro! Thanks a lot for the info... but im a bit confuse lol. I have to go with the 295/35 or 295/30?


Btw yes my front tires are 285/35. Im following instroctuions lol I wabt to rub square setup but I dont expect that the rear tires on the 18x11 wheels are going to look so stretch :(

I just want to intall a wider tire in the rear to fill that wheel lip without having problems with the traction control..

Thanks

I see what you're going for now haha. Can you post a pic of the rear? Maybe you have room for a 305/30.


Sent from my iPhone using Tapatalk

18's on a 370z
 

https://uploads.tapatalk-cdn.com/201...8fb45ac037.jpg
https://uploads.tapatalk-cdn.com/201...5009bccb82.jpg

This calculator might help you decide as well. I know it may not be 100 percent accurate as all tires tend to vary when it comes to size depending on the brand. Post a pic of the rear to get an idea of how stretched the tire is now with the current size you're running and that will help a lot. Here's a link to the calculator as well.
https://tiresize.com/calculator/

If your offset would work in the rear with a 315, this would be the perfect setup in my opinion. Rear would look amazing.
https://uploads.tapatalk-cdn.com/201...225da7f71d.jpg


Sent from my iPhone using Tapatalk

18's on a 370z
 

26.7" diameter is stock so whichever is closest to that.

Check the specs on the actual tire you plan to buy, sometimes the same size tire from different brands can be very different actual measurements.

True. But he needs to match his front diameter and the stock diameter. Each corner must be within a certain range to not trigger traction control


Sent from my iPhone using Tapatalk

Yeah I missed that front size in his post. I think I read somewhere they need to be within 1" to not set off the TCS. So your recommendations above would be the best bet

I think I read that as well but cannot confirm the truth haha. It seems reasonable though...


Sent from my iPhone using Tapatalk

Here is the pic guys! Thanks a lot for the help

https://flic.kr/p/QxEQAq

I think im going with thw 295/35 cause I know is hard to find more than that here on PR :(

I'm not to disagree with anyone, but the front oem tire size is taller than the rear. Nissan did this so the car can understeer, which is a lot safer than oversteering. The 350z had slightly shorter tires in the front than the rear and they constantly spin out.

The traction control system in our cars is not very sophisticated, so going with different tire size should not be a problem. In the summer I'm going to run 275/35R18 in the front with 295/35R18 in the rear.

Thanks Jonny! I think im going to call this Monday to order the 295/35/18 tires

Not sure if the understeer is from how tall the tire is, rather than its width. The narrower front tire will definitely contribute more to the understeer. You're right about the TCS. It's useless.

^ Apparently it does affect it. There is a guy that comes into my work who is an enginner for continental tires and gave me a lesson. Honestly I don't think it will have an enormous effect bit it does affect it a little. Also the cost of the tire is also a factor.

Does it have something to do with the power rotation speed having more grip? I jut can't see how else tire diameter would matter much...

18's on a 370z
 

I have heard different stories about diameter making a difference. It depends on the type of car as well. Here's a good read I found on it.

***If the tires up front differ in diameter from the ones in the rear, other kinds of handling defects can occur. If your car is front or rear wheel drive only, and you have compensated the difference in ride height, the only difference will be a difference in grip. A larger diameter tire will have a slightly bigger contact patch than a smaller one, and hence it will provide just a little more grip.

If your car is full-time 4WD, tire diameters can influence the amount of steering your car has very dramatically. Suppose the front tires are larger than the ones in the rear. The front end of the car will tend to travel a greater distance than the rear. Around a corner, the paths covering the largest distance are located towards the outside, and the short ones are located on the inside. So, the front end will want to go around the outside, and the rear will want to go right on the inside, making the car point outwards. In other words, the car will understeer horribly. It will feel like a ‘sticky’ kind of understeer too, slowing down won’t help very much, and braking will only help for a very short time because the car will very quickly try to return to its understeering state. The opposite can also happen: bigger tires in the rear will make the car oversteer very badly. ***

As stretched as that 285 is in the picture I would recommend going with a 305/30. Technically, if the tire brand and model remain the same, a 305 size tire should give you about half an inch on each side of the wheel. A 305/30 is just a tad bit shorter in the diameter so that will remain the same as well.

Again, all this is assuming that the calculator posted above is accurate.


Sent from my iPhone using Tapatalk

This is a 305/30/18 on a 18x11.5. I definitely think you should go this route.
https://uploads.tapatalk-cdn.com/201...f84ea91c29.jpg


Sent from my iPhone using Tapatalk

You may want to consider, 295 30 up front and 315 30 in the rear!

This guy knows how to party^ lol


Sent from my iPhone using Tapatalk

Thanks for the recommendation bro but I already have the 285/35/18 installed. Today Im going to try to change the rear 285/35/18 in the shop that I bought the tires. I hope they can change my tires if not, I have to buy another set of new tires for the rear :(

Sorry about that...good luck my friend!

Sent from my SM-N910P using Tapatalk

Can't believe this thread is 5 years old, 2nd page post 19 was my old Z.

I finally talk with the shop and they have the tires in 295/30/18 & 295/35/18 and they are going to change my tires :happydance: now Im dont know which of those two setup take lol! I was thinking on get the 295/35/18 but I dont know if the 0.8% of difference in diameter are going to affect the traction control looool! here are the pics of the tire calculator.

Attachment 119850

Attachment 119851

They have a 305/30/18 but in Achilles ATR Sport... the review are not the best specially at the track where I love to take my Z. So they are not an option.

Carlitos, compra las 295/35/18 y carajo ya pon estas gomas que nos tienes locos con este post jejejeje :rofl2:

jajjaajajjajajajajajajajajajajajajajja! Hacia falta que alguien me hablara asi hermano :bowrofl::bowrofl::bowrofl::bowrofl: Que se joda... voy a montar las 295/35/18 y si el traction control jode, pues se lo arranco pal carajo:inoutroflpuke:

Yo prefiero que la goma este un poco mas ancha especialmente que son 18's

Outstanding that they are going to hook you up! I'm running 295 30 square...295 35 square would work too! My offsets are +30 on all four wheels so I can rotate them without having to remove the tires. Regardless a square setup is nice at the track.

Sent from my SM-N910P using Tapatalk

Pienso igual que tu hermano! por eso estoy mas inclinado por la goma 295/35/18... para que no se vea tanto el Gap .

Gracias por el consejo. :tup:

Thanks for the recommendation bro! :tup: for now im going to keep the 285/35/18 on front and install the 295/35/18 in the rear :tup: For my next setup im going to do what you told me. Square setup :) well that was my intention when I buy the 285/35/18, but I dont expect that the 285/35/18 on the 18x11 wheels are going to look soo stretch :wtf2:

BTW on my 19x11 wheels I have 285/35 installed and dont look that stretch loooool!

I want to give you thanks to everyone who help me with this damn issue! as soon I finish the car im going to post some pics :stirthepot:

are you allergic to mildly stretched looking fitment? tire sizes vary by manufacturer, there's always variation

easiest solution? stop tripping about it

I feel the same way he does, I hate stretched tires, it looks tacky IMO. I wouldn't want them on my car. Telling him to stop tripping isn't really helpful. He doesn't want to spend his cash and be stuck with tires he doesn't like for like 2 years.

Well my friend, when your wheels have the outer lip exposed like this, I dont think this is mildly stretch tire ;)

https://c1.staticflickr.com/1/313/31...46fce940_b.jpgUntitled by Carlos Berrios, on Flickr

I dont like how it looks and I dont want to damage a wheel in a damn hole... Here in PR you can find a lot of those hahhaa!

Anyway I already order the 295/35/18 tires and Im going to change them tomorrow :)

Thanks to everyone who take their time to help me!:tup:

completely agree with you brother! :iagree::iagree::iagree::iagree:

You understand :tup:

https://uploads.tapatalk-cdn.com/201...89e75549bc.jpg

Stock height.

18x275s with Toyo RA1s (worn thin)

Awesome pic dude!!!!!:tup:

looking at everyone's car on 18's and they all look amazing!! was gonna sell these but decided to give em try.. doesn't look to bad i guess!!

http://i38.photobucket.com/albums/e1...ps62lcq7li.png

Looks great dude! :tup:

:iagree:

Soon Im going to post pics of my new setup :stirthepot:

awesome bro can't wait!! really like how your car looks!!!

thanks man!!! appreciate it!!