Hmmm. Very insightfull. Now you have me thinking about replacing all four. I guess I should wait and read all responses, but your point makes a lot of sense. It's not like I race, and have panic stops but I certently don't want a control problem during heavy breaking. Thxs

 

Ditto

 

"Downshifting the paddles" would wear the rear tires, not the fronts as engine braking would have been through the rear wheels and not through the front wheels as the Corvette is a rear wheel drive, not a front wheel drive. I'm curious, why bother to take a poll if your going to ignor the results anyway?

 

I have the same problem as the OP on my 08 Z-51. My rack and pinion went out almost a year ago, and the dealer replaced it under warranty and of course had to realign the front and rear. My tire wear is even, however at 18,000 miles, my fronts are to the wear markers and the rears have about 50% left. I wont say I am a spirited driver, but like speed when I can get on a road I can run over speed limit without too much hassle of getting busted. I may tend to take exits of expressways or highways fast, because I just love the way the Vette handles the curves, so I attribute the excess wear up front to fast exit and entrance on turns, and the air pressure problems I discuss in the following paragraphs.

There is one thing though, that I commented about on here to another thread a couple weeks ago. All my tires lose air pressure over a couple of days or with large temp drops and not always evenly. I understand the thermal dynamics involved with expansion and contraction of tires due to temperature, but think there is another problem, such as valve stems leaking, etc. The changes are inconsistent. I will fill them all to 30 Lbs and 2 days later one of the fronts is down to 27 the other is at 28 or 29. Same thing happens for the rears.

Dont know if the OP has that problem, but I am going to install 2 new GY OEM runflats on the front, and assume for the time being that both the new fronts and old rears will wear out around the same time and then most likely go to the Michelin PS2's.

Sorry for seeming like I am stealing the thread but wanted the OP to know he "ain't" the only one with the problem and suggest he either does what I am going to do, or "do a Mega Burnout" like previously suggested then replace all four.

 

Seems unusual to me that the fronts would wear out at 15K miles; I have to go with several who have already commented that an alignment problem is more likely the culprit & you sure don't want to mount new rubber until you fix that problem.
IMHO opinion, I would take the opportunity to get rid of the GY "run craps" & replace all four with decent rubber. I'm running Nitto Invo's which I find to be great, but the Michelins have also got very good reviews. Whatever you do, have the alignment set at a REALLY GOOD alignment shop. Keep in mind that a quarter degree might not mean much with a standard width street tire, but can make a huge difference with rubber as wide as on the C6.

 

Makes me wonder what PSI did he keep his tires at?

 

I had an almost identical scenario with mine when I bought it used.
I replaced the front GY's with the Firestone Wideovals until the rears wore down enough to make it sensible to replace them. I will admit that the car handled so much better with the new tires that I did more than a few powerslides to help the rears move along. In hindsight, I probably should have just done all four at once if I had the cash to do it.

 

Again if you have uniform wear across the tire treads, as the OP has indicated is the case, this would rule out under-inflation or over-inflation as the cause of excessive wear.

 

No, it's not tire preasure as I monitor that regularly. There is the standard 2-4 psi drop when cold, then within a few minutes of driving, the psi picks up. When I see 27-28 on warm tires, I fill them back up to 31 when cold. We have the same variables on my wife's Cady.

Relative to the statement that I am not taking advice. Heck, I think I am or will be. The poll is running 60-40 towards replacing all four versus replacing the fronts with the original GY. I have eliminated thinking of mixing brands or NRF with RF.

There have been some really great comments and one I was totally unaware of, i.e. more tread on new fronts then exist on rears potentially resulting in unstable breaking. That's a show stopper.

Thanks for all your comments.

 

I see a bunch of people are suggesting to do a burnout and wear the rear tires down so you can replace all 4.

Why dont you not do a pointless burnout and:

A. Replace the 2 fronts with the same exact tire

B. Replace all 4 tires and sell the 2 rears if they are still good.