I decided to go with R:275/40R/18
but I still don't know about the Front: 245/40R/18 or 255/40R/18
don't know the difference between them such as how they will look

 

Either will work fine, the 245 will have a tad of a stretched look to it on a 9.5" wheel. 255 would look just right, no stretch, no bulge.

 

I'm running a square 9.5 setup and wish I was running 255/40 and 275/40. The set was on the car when I bought it and has 35 series, which even with being lowered 1" is still too little tire.

 

I am running 255/50f, 275/40 r and love it.

 

Speedometer will read 100.07 @100.0 MPH. This is perfect.

 

void

 

I am currently running 06 stock 18" touring rims on my 350Z F:225/45/18, R:245/45/18
and i bought 18x9.5 aftermarket rims
would F:255/40/18, R:275/40/18 looking more fatter than my current setup even though it has lower profile?
im okay with this setup (F:255/40/18, R:275/40/18) if it doesn't look bulkier or fatter than my current setup (F:225/45/18, R:245/45/18)

so i was considering just getting the sams sizes all around or F:265/35/18, R:295/35/18 (some people said it would be too small if i would not drop my car and 295 might be too wide for 9.5" wheels)

please help~

 

 

Details on the setup please Mr. Sparco.

 

^ 18x9.5/18x10.5 +15 255/35 and 285/35 tires.

 

A 275 mm tire IS 30 mm wider than a 245 mm tire. That is just a simple fact.

 

i used to run 255/35, 265/35.. looked good not too beefy

 

with 255/40 275/40, did anyone have TPMS or TCS problems?

 

That should be fine, though a 255 is tiny for a 9.5" wheel.

 

I'm currently on a 18 x 9.5 +20 and and have 245/40's and 275/40's. I've done a couple of tracks days and the balance is OK but the 245 in the front is a little too stretched for my taste (but looks ok). I was planning on going to a square 265/35 all the way around or maybe a 255/35 and 265/35 (similar to what the Nismo guys ran the Z33 at when they doing the Z Master stuff) for a little more neutral turn-in. However note, with a 35 aspect in these sizes, you're effectively changing the final drive and speedo readings.

 

If you are tracking it, why not go square 275?

 

Square 275 would be ideal on a 10"+ wheel, but IMO 9.5 is better suited for a 265. Also, I'm not sure if additional size is even needed for the car's output. But I'd have to try it to know.

 

Fair enough, though a LOT of track guys run 275x4 on 17x9 or 18x9 wheels. Hoosier is the only manufacturer I've heard indicate that they prefer a 10" wheel for their (wide) 275 tire. I ran Hoosier R6 tires in 285 and 295 on 10s for awhile, and all appeared optimal. I just changed wheel set-ups to 18x10.5x4 with the 295s, but only have one track day on them so don't have much for feedback.

 

Hi guys, page 18, mich's blue zed. Anyone know what rims these are? They are awesome!!!

 

Here's my current stretched setup:
Wheels: 5Zigen Proracer ZR+520 18x9.5 +20 (squared setup)
Tires: General Exclaim UHP 225/40/18

My BFG KDW's (265/35/18front 295/35/18rear) should be here on Wednesday, ill keep you guys posted on that.

for more pics, see my thread! https://my350z.com/forum/media-share...u-says-hi.html