killian96ss

275/40 is the correct size for a front Z06 9.5" rim. This is based on manufacturers recommendation and the fact that the 265/40 is no longer available. I've had no problems at all with AH or TC using the 275/295 combo. If a 275/35 was available I would have gone that route to keep the sidewalls the same, but nobody has that size either, sooo.

Steve

_zebra

i personally got real tired of the short Z06 tire heights, so i went up to 275/35-18 & 295/40-18 NT05s

NSFW

Did you have any issues with clearance, in front or in back?

dreamr616

So you're running 18" wheels all around?

_zebra

i'll let you know when i finally get my car out of the shop & can get the tires mounted...
but i have no reason to expect problems. people run tires taller/wider than these all the time without modification. the only thing i expect is that since my ride height's lowered about 1" on the stock bolts to close the current massive fender gap, i'll just have to raise it back up.

yep, my FRC has factory rear 18x9.5 on the front & repro 18x10.5 in the back (same widths as z06 wheels), and my current tires are the same overall z06 heights (the front reduces sidewall to account for extra wheel diameter [265/35-18 vs 265/40-17]). the new set goes back to base model front tire height (25.6) & just over stock rear height (27.3 vs 26.7).

kish2554

Steve -- where do you see this manufacturer recommendation? I'm really torn because the 275 shows to have the front and rear difference in height as being 0.47" as opposed to the 0.5" required for TC to not act up. That said, I'd rather not step down to 255s as, well, it's a downgrade. Wish they hadn't discontinued or made this such an odd size...

killian96ss

I believe I saw it on either Continental's site or America's Tire, however that was some time ago and I replaced my 02 Z06 with a 23 C8 Coupe. When i was running the 275 fronts I never experienced any issues with TC or ABS.

Here are the last pics I have with Continental Extreme Contact Sports, 275/F and 295/R.

_zebra

haha... you'll get more variance than .03" with day -> night temperature changes!
people run everything from a square setup to 1" taller rears, and the car don't freak out.