98cobrakiller

getting ready to order a set of 18" 9.5 rims this weekend but idk what tire size would work 275/40/18 work all the way around or shound i go skinner to a 275/35/18 p.s. its stock ride height but when i get the new shocks/struts in lowing about 1.5 inches

StraightTimeStirrups

Here is what 275/40/18's look like all around. I think I have some slight rubbing in the front but I havent driven car much to know how much it will effect me.

Joe

cowpunk

Do 275/40ZR18's.

275 = section width in MM (1 inch equals 25.4 mm)
35= sidewall height 35% of 275mm
275/35 = Aspect ratio

I think the 275/35 would look a little short.

Look at 285/35R18s in rear & 275/35R18s in front if you like lower sidewalls.

Toyo makes the T1 Sport in both sizes, so Nitti probably does as well.

Cowpunk

98cobrakiller

cowpunk i know what the measurments are im a service writer i do all that for a living. my man issue is 90% of the roads around where i live are pothole heaven and i aint about replacing bent rims. and yes nitto makes a 275/35 and a 275/40. plus i want to be able to rotate my tires. until oewheels comes out with the new style zr1s in 18" 10.5 for the rear

LPE 403

iTrader: (6)

Stick with the 35 series. Lowering an inch an a half, then adding another 1" in tire height will give you some rubbing issues up front with the 40s.

TXZ28LS1

iTrader: (5)

I had 18x 9.5 C5 Z06 all the way around and ran 275/35/18 on all fours with BMR 1.25 lowering springs. You can fit a 285/35/18 tire and i think that will fit perfect.

cowpunk

Nice,

And, I've sold tires for 25+ years. 35's will have a shorter sidewall than 40's.

Potholes will still be tougher on the 35's than a 40's.

If you think the shorter 35's would look better, get them. That's what I would do too.

Cowpunk

02TransAm/Batmobile

iTrader: (32)

I am lowered on Strano/Koni's and running a 275/40R18 in the front and a 295/40R18 in the rear. Looks perfect to me. I've had no problems with it but notice a slight rubbing noise when turning the wheel too far. Otherwise, I'd still do it this way all over again; 275/35R18's looks dinky.

ls1n00b

iTrader: (14)

40 profile on an 18" is to tall imho. 35 is just right for 18"

Paul Huryk

35 gives the proper (stock) tire diameter with a 18" wheel. 40 series will give you a 1" larger tire diameter (about 4%), which may rub in the front and may also give you a problem with the speedo and/or computer.

GunnyJ

does any one have pics withe the 275/40/18 or 275/35/18 on 9.5 wheel on a T/A

badformulaLS1

iTrader: (1)

My tires are 45s all around on stock ride height and don't rub.

Ballzee

iTrader: (5)

my opinion is 35's especially if its lowered..

Rebob5

iTrader: (3)

Here is a pic of my 275/35/18 on a 9.5 inch wheel.

99Bluz28

iTrader: (35)

A 275/35/18 (25.58") is well within the stock height range.

Stock tire sizes:
275/40/17 = 25.66"
245/50/16 = 25.65"

toadzq8

iTrader: (43)

Go 285/35, I have them on 9.5" forgestars on the front and 295/35's on 10" wide in the rear, fit perfect, I like a bit of tire out there to protect the lip of the wheel

99Bluz28

iTrader: (35)

Yeah a 285/35/18(25.85"), is also within the stock height range and is recommended for a 18 x 9.5 wheel. The only down side is that you'll have less tire option and they'll cost more than the same tire in a 275/35/18.

Here's a few more stock tire sizes I forgot to add.

235/55/16 = 26.18"
215/60/16 = 26.16"

bricco1029

iTrader: (1)

Here are my 18x9.5 MRR gt-7s I just put on today. Wrapped with 275-40-18 Mickey Thompson Street Comp Tires. Cars is lowered with Strano springs and kyb shocks all around.

wabmorgan

My suggestion would be to either run 275/35/18 or 285/35/18.

The 285/35/18 will fit... it will rub the plastic fender liner in the front just a little.

(I know because that size it what I as running.)