View Full Version : Just ordered 18x.95 rims should I go with a 35 or 40 tire?


Humanoid
11-04-2008, 09:46 AM
Just ordered polished 18x9.5 z06 wheels all 4 corners. I want nitto 555 tires. I am at stock height so should I go with 275/40zr18 so that is fills the wheel well a little more or the 275/35zr18? The 40 is basically 1" bigger diameter.

thanks

desertLS1
11-04-2008, 10:34 AM
Nice.
But, reason why you didn't go with 10.5 in the rear?
I went with 275/35 for my 18's, And i am lowered on Sportlines.

Humanoid
11-04-2008, 10:43 AM
I want all the tires the same so I can rotate them and I dont want to do any BFHing or cutting of bump stops. Hrm, so since I am not lowered 40's may alieve the offroad look or not?

99Bluz28
11-04-2008, 05:12 PM
275/40/18s normally cost less than 275/35/18s :nod:

Check-out this thread there's a few cars in it that have 275/40/18s front and rear. http://www.ls1tech.com/forums/showthread.php?t=1011193

MadIceV8
11-04-2008, 05:29 PM
275/35/18.

If you go with a 40 series your MPH will be off. Compared to the 35, if your odometer reads 65, you will really be at 68mph with the 40.

Humanoid
11-04-2008, 05:50 PM
Can the speedo thing be fixed in the tune? I will be getting retuned for something in the near future im sure.

Vicinity
11-04-2008, 06:00 PM
Can the speedo thing be fixed in the tune? I will be getting retuned for something in the near future im sure.

No. You'd need to recalibrate the speedometer.

raptorws6
11-04-2008, 08:14 PM
Go with 35's.

michaelg589
11-04-2008, 08:23 PM
275/35/18.

If you go with a 40 series your MPH will be off. Compared to the 35, if your odometer reads 65, you will really be at 68mph with the 40.

You mean the SPEEDometer right?

and yes, you should go with a 275-35 tire

Brian2006
11-04-2008, 10:12 PM
I went with 305/35/18 nitto 555r on my rear z06s (18x10.5) and I felt like the 35s were too big when lowered on eibach prokit. I now have to roll my fenders.

I'd go 275/30/18 if you can.

69TA
11-04-2008, 10:13 PM
go with 35's other wise you will risk slicing the tires since the 40's are taller.

OutKlast
11-04-2008, 10:13 PM
http://www.1010tires.com/tiresizecalculator.asp

They have a nice calculator to put in stock size then see what difference a different size tire will make.

Atver300
11-04-2008, 10:19 PM
No. You'd need to recalibrate the speedometer.

HUH? Yes the speedo can be changed in the tune thats how you recalibrate it. So if you do get the 40 series tire when you get the tune they can fix the speedo. I have the 275 40 18 and they do fill the gaps a little better on a non lowered car, but they are up for replacement and I am cosidering 35s so i can lower it. heres a pic

http://i241.photobucket.com/albums/ff310/atver300/camaro6.jpg

munecorey
11-04-2008, 10:53 PM
I have 275 40 18 on all four corners and in my opinion if you dont want to lower it they do look better than a 35 series, but they do rub on sharp turns! Heres a pic of mine!
http://i128.photobucket.com/albums/p174/mtdakil/PA230924.jpg

Humanoid
11-05-2008, 09:19 AM
Wow you guys have helped me greatly. Thank you.

I will go with 35s because I want no rubbing issues. If it were a matter of just changing the tune I would have gone with 40s. Thanks again.

Humanoid
11-05-2008, 09:20 AM
I have 275 40 18 on all four corners and in my opinion if you dont want to lower it they do look better than a 35 series, but they do rub on sharp turns! Heres a pic of mine!
http://i128.photobucket.com/albums/p174/mtdakil/PA230924.jpg


Your car looks good. With the 40's. The rubbing thing is not very good at all though.

Thanks for your input.

69TA
11-05-2008, 11:28 AM
if you need to rent a roller I have one that I rent out.

munecory your vert is looking real good

99Bluz28
11-05-2008, 03:00 PM
go with 35's other wise you will risk slicing the tires since the 40's are taller.

Unless you have the wrong wheel offset 275/40/18s are not going to rub in the rear. :D

http://i523.photobucket.com/albums/w355/RDBrownie/Bumpstopmod2004.jpg

http://i523.photobucket.com/albums/w355/RDBrownie/Bumpstopmod2003.jpg

MadIceV8
11-05-2008, 04:16 PM
I went with 305/35/18 nitto 555r on my rear z06s (18x10.5) and I felt like the 35s were too big when lowered on eibach prokit. I now have to roll my fenders.

Thats because the sidewall is a percent of the width. So your 305/35/18 will have a bigger sidewall then a 275/35/18. Thus your minor issue.

2000nbmZ
11-05-2008, 06:02 PM
I would go with the 40s look better.

michaelg589
11-05-2008, 06:45 PM
http://i523.photobucket.com/albums/w355/RDBrownie/Bumpstopmod2004.jpg
]

I am completely confused as to how those DON'T rub. :confused:

Oso SS
11-05-2008, 08:16 PM
i'm confused as to how that car goes ANYWHERE without scraping on everything.

99Bluz28
11-05-2008, 08:45 PM
I've got rear air springs, and this is my usual ride height.:nod:
The other photo is with it aired-out.:D
Even with it aired-out I have 3/8" to 1/2" of tire to fender clearance (yes,rolled fender lips).
http://i523.photobucket.com/albums/w355/RDBrownie/fall08schoolstart010.jpg

my bandit
11-06-2008, 07:11 PM
mine are 245/40/18 and 285/40/18 and have no problem with rubbing on stock height
they are also nitto nt555 extreme

http://i257.photobucket.com/albums/hh209/mybandit/100_0462.jpg
http://i257.photobucket.com/albums/hh209/mybandit/100_0470_00.jpg

SoCal WS6
11-06-2008, 07:41 PM
I just got 275/35/18, but I did consider running the 275/40/18 in the rear. I have 1 inch Hotchkis drop springs.

http://www.ls1tech.com/forums/attachment.php?attachmentid=152981&stc=1&d=1226018420