: Only one tire size fits the 18? How Big in Rear?


fintheman
11-25-2006, 01:08 PM
I had a nice screw go into my stocke tire that could not be patched/plugged.

I will have to get two new tires.

I'm wondering, what is the widest tire I can get for the stock 18's for the rear.

I tried to look at the FAQ and browsed every thread in the tires/wheel section with no available.

V8 GOAT
11-25-2006, 09:28 PM
245/40/18 should fit back there without a problem. You may be able to fit a 255, but it really depends on the tire you choose (some tires run wider/narrower than others of the same size). A 265 will be too big...

Juniorss
11-25-2006, 09:45 PM
I think a 265 Nitto would be fine since they run small.

fintheman
11-25-2006, 10:01 PM
ty ty, thats the answer I was looking for.

If someone doesn't make on a deal for the Beyerns 5's I wanna buy off them, I'm just replacing my rear tires since one can't be repaired.

4CFED
11-26-2006, 09:21 AM
ive seen a 275 bridgstone stretched on the stock 18s, and there was a nice bulge in the sidewall. plus it rubbed on launches.

BOSSGTO
11-26-2006, 12:42 PM
255/35/18

Badness
11-26-2006, 04:29 PM
Front Optional 18" 235/40-18
Rear Optional 18" 265/35-18

Tire rack says these are good with no problems.

HotRodGuy
11-27-2006, 08:43 AM
has anyone gone 245 or bigger on the front w/ the stock 18's?

J.E.T.
11-27-2006, 09:08 AM
I'm running Nitto Invo's.......245x40x18 all around and they look PLENTY big, believe me. I'm also running plus one springs all around too so that might help.

JET

HotRodGuy
11-28-2006, 08:36 AM
what does the look matter? A 245 isn't a big tire.


are those on stock wheels?

LIVEVIL
11-28-2006, 08:56 AM
I spoke with someone from tirerack who said 265 is just too big for a 8" wide wheel. Have to agree. I have seen them and they leave a buldge on the sidewall. Not the best looking, but it is the right size to go with 235 fronts.

italiastraps
11-28-2006, 08:57 AM
Front Optional 18" 235/40-18
Rear Optional 18" 265/35-18

Tire rack says these are good with no problems.




Where did you find the info (Tire Rack) that the 265/35 was OK for the rear 18-inch stockers? I think most people here say its too wide...

However, it seems like the perfect size as its the same diameter as the stock fronts...

Thanks

Juniorss
11-28-2006, 02:19 PM
265/35/18 Nitto NT555s vs 235/40/18 Nitto NT555s. I put these on 18x9 and 18x8's but im sure the 265s would fit fine on an 8 inch wide rim.

http://sincitygoats.com/gallery/d/6155-1/tires800.jpg

LIVEVIL
11-28-2006, 03:36 PM
They fit technically, but don't look great. X9 is one thing, but the 8" is just too small.

Badness
11-28-2006, 05:08 PM
Where did you find the info (Tire Rack) that the 265/35 was OK for the rear 18-inch stockers? I think most people here say its too wide...

However, it seems like the perfect size as its the same diameter as the stock fronts...

Thanks

Go to tire rack, select 2006 gto and on the first page that comes up scroll to the bottom and select optional sizes.

Optional 18" Sizes for 2006 Pontiac GTO
Save This Vehicle Select New Vehicle

Description Size
Original Equipment Optional 235/40-18

View All

View Best Sellers

Tire Decision Guide
Front Optional 18" 235/40-18 View Front & Rear Pairs

Tire Decision Guide
Rear Optional 18" 265/35-18

Select "View Best Sellers" to see the most popular tires in this size for your 2006 Pontiac GTO (based on The Tire Rack's recent sales).

Select "View All" to see The Tire Rack's complete selection of tires in this size.

The optional sizes listed above are found to fit most vehicles when using proper wheels. General vehicle condition, vehicle and wheel application can affect proper tire fitment. Optional sizes should be carefully tested on a vehicle and clearances with the body work and suspension should be checked prior to driving on a tire. Failure to do so can cause damage to the vehicle and/or sudden tire failure due to tire damage caused by contact with the vehicle.

Badness
11-28-2006, 05:14 PM
I have seen many people running 275 nittos on the stock rims. Everyone says the nittos are a small 275 though, which makes them approximately a real 265.

italiastraps
11-28-2006, 05:29 PM
Thanks for the excellent follow-up. I noticed that none of the 265 tires are specified for anything less than a 9" wide wheel....so I guess the Tire Rack is assuming the wheels aren't stock?

LIVEVIL
11-28-2006, 05:30 PM
I was still going to go with a 255. Not much difference though for the 265

Badness
11-28-2006, 06:01 PM
Thanks for the excellent follow-up. I noticed that none of the 265 tires are specified for anything less than a 9" wide wheel....so I guess the Tire Rack is assuming the wheels aren't stock?

Hard to say really what they mean =) There is so much said about tires these days.

But with the actual real world success of the nitto 275's I dont seen why there would be a problem with a 265.

YaXMaN
12-13-2006, 05:43 PM
Does anybody have a picture of a 265/35/18 or a 275/35/18 on a factory 18" rim? I'm really thinking about trying the 265/35/18, and soon. One of the Discount guys took a measurement of the rim width with calipers, and it read close to 9"... he thinks it'll work. I do understand the difference between "rim width" and "measured rim width".

Please, anybody with real-world experience, step in and straighten this out!
Thanks, YaX

YaXMaN
12-13-2006, 05:53 PM
By the way, the 235/40 and 265/35 are perfect matches as far as rolling circumference is concerned...

235/40 ZR18 - diameter 25.4" and 820 RPM

265/35 ZR18 - diameter 25.3" and 823 RPM

These are Fuzion ZRi tire specs

italiastraps
12-13-2006, 07:21 PM
Does anybody have a picture of a 265/35/18 or a 275/35/18 on a factory 18" rim? I'm really thinking about trying the 265/35/18, and soon. One of the Discount guys took a measurement of the rim width with calipers, and it read close to 9"... he thinks it'll work. I do understand the difference between "rim width" and "measured rim width".

Please, anybody with real-world experience, step in and straighten this out!
Thanks, YaX

I've measured "across" the stock 18's too, and got a measurement close to 9'' .....but I think the point at where the wheel is measured in terms of seating the tire in in from the edges. Hence, the 8-inch width. (Does anyone have a photo of a bare wheel to illustrate?)


I would be cool if it was a bit wider for that 265 though, as its the right diameter in relation to the stock set-up. :)

YaXMaN
12-13-2006, 07:35 PM
I've measured "across" the stock 18's too, and got a measurement close to 9'' .....but I think the point at where the wheel is measured in terms of seating the tire in in from the edges. Hence, the 8-inch width. (Does anyone have a photo of a bare wheel to illustrate?)


I would be cool if it was a bit wider for that 265 though, as its the right diameter in relation to the stock set-up. :)

Fuggit, might have to just go try it. I won't like it they bulge too much, or it handles like shiz, but if it works, could be an interim solution until I pony up for for some new wheels and DR's.

What I can't figure out is how the hell the guys are putting 275/40/17 Nitto 555 R drag radials on the stock 17" rim, and it looks and works fine!
Half a dozen of the guys are running this setup at the track. That tire's width measures 10.91 inches. The 265 Fuzion measures 10.7"

Fantasy2
12-15-2006, 06:24 AM
I just put 275-40-17 on stock wheels. The fit was good with some buldge. I am going to put on some c-6 9.5 wheels after winter. They look really big not mtd. I have no rub in wheelwells and the look from the back is BIG. I wish I could get a tire as big a Viper on back, Not cutting car. The smoky burnouts on the Kumo's are also good, nice long black marks on the road, lots of smoke.Have a good holiday season.

JayC'sG
12-15-2006, 06:40 AM
A REAL width 265mm and above will NOT correctly fit on a factory 8" tire. There are countless, countless threads on this. I have personally been down this road, and that's exactly why I had my factory wheels widened. There are just physical limits to what you can put on the 8" wide wheels. Can some fit yes, is it safe/correct, no. The only real way to know for sure is to physically measure. A 265 in one manuf isn't awalys exactly the same with another. I'm running a 275/35/18 Kuhmo, that tire is 11.1" worth of contact patch, most 275s aren't and the whole tire is wider. Those are just some of the things you might face. Not trying to be rude or negative, but unfortunately we're limited to what we can put on our 8" rim widths.

neobluemax
08-15-2014, 10:43 AM
ha wrong thread ignore me :P

dyno junkie
08-15-2014, 02:09 PM
Having been down the path of thinking that 265/35/18's would be good on the factory 18" x 8", I can tell you that they provide minimal if any increase in straight line traction.

The fun starters when you throw the car into a corner and the back end decides to start wobbling.


For the street I use 245 on 8.5" and 275 on 9.5".
For circuit I was using 245 on 8.5" and 265 on 9.5".
For the track 225 on 8" and 265 on 8".




:aus_flag:






.

LS2VXR
08-15-2014, 02:12 PM
i know many people who run a 265 no problems at all personally the biggest i ran on a stock 17in wheel was 255s