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Wtf?!?!

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Old Jul 21, 2010 | 02:00 PM
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I just took my car in for a rear tire rotation...They are directional, so you need to pop them off the bead and turn them around. I did this because there is more wear along the inside edges than the outside, one tire much more so...I think I found out why!

The guy at the shop pointed out that there was one 285 and one 255 on the back! The other 285 was on the front.

The tires have been on the car for 13 months 17K miles and I can't think of another time all four have been off the car since then! Anyway, I am squared away now...I am pissed that whoever put them on wasn't paying attention, but even more so at myself for never noticing this!

Think it's a good idea to get the car re-aligned? Do ya think running with different width tires screwed it up?
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Old Jul 21, 2010 | 02:14 PM
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Thats pretty weird that you never noticed the size difference!
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Old Jul 21, 2010 | 02:27 PM
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Typical. I've read countless stories where the wheels have been put on wrong and the owner didn't notice for a while. Me included.

But this is a new one on me. See that's why they don't let you in the shop. None of us would let these yahoos touch our car, let alone pay them to.
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Old Jul 21, 2010 | 02:28 PM
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Those are the stock sizes for that car, I just did a ton of research on them since I replaced all 4 when I bought it. Typically you don't rotate these. You might want to look at alignment or suspension if you have uneven wear.
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Old Jul 21, 2010 | 02:33 PM
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I'd be getting new rubber
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Old Jul 21, 2010 | 02:34 PM
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Originally Posted by romankrzy
Those are the stock sizes for that car, I just did a ton of research on them since I replaced all 4 when I bought it. Typically you don't rotate these. You might want to look at alignment or suspension if you have uneven wear.
Yes they are the right sizes but both 255's belong on the front
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Old Jul 21, 2010 | 02:47 PM
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Originally Posted by 96 Vette CE
Yes they are the right sizes but both 255's belong on the front
That's what I get for multitasking and not taking the time to read, thanks.
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Old Jul 21, 2010 | 02:58 PM
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Originally Posted by socalman
I'd be getting new rubber
All of the tires have a decent amount of life left in them...The 255 that was on the back is worn on the inside part of the tire, that one I will probably replace in the near future...
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Old Jul 21, 2010 | 03:13 PM
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Even with mismatched tires on rear i would suspect either a camber or toe issue on the rear since your rear tire was only wearing on the inside. Don't know about where you are but here in central Texas, Firestone used to do free alignment checks. Meaning they would check the alignment and let you know if it was in or out. Of course they would love for you to go ahead and get one done if it needs it. Actually they used to have a good deal on lifetime alignments, pay once and have done for free then on. Now the disclaimer: Use Firestone at your own risk, like any other place they can have good tech's and not so good tech's. (used to be service manager at a Firestone)
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Old Jul 21, 2010 | 03:24 PM
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I had mine aligned when I got the new tires and the right rear was way off, I'm glad I had it done.
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Old Jul 21, 2010 | 03:36 PM
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Originally Posted by socalman
I'd be getting new rubber

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Old Jul 21, 2010 | 03:55 PM
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My car had THREE different brands of tires on it when I first got it!
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Old Jul 21, 2010 | 04:56 PM
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Originally Posted by RetiredSFC 97
Typical. I've read countless stories where the wheels have been put on wrong and the owner didn't notice for a while. Me included.

But this is a new one on me. See that's why they don't let you in the shop. None of us would let these yahoos touch our car, let alone pay them to.
For sure
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Old Jul 21, 2010 | 05:01 PM
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Would having two diff size tires on the rear for 17K miles screw up the rear end gears/posi unit? A 285 tire IS slightly taller than a 255 isn't it?

astepup said that
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Old Jul 21, 2010 | 05:09 PM
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Do you really want to wonder about it while you are going fast through the S's, align
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Old Jul 21, 2010 | 05:12 PM
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Originally Posted by astepup
Would having two diff size tires on the rear for 17K miles screw up the rear end gears/posi unit? A 285 tire IS slightly taller than a 255 isn't it?

astepup said that
I believe it's just wider.
Joe
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Old Jul 21, 2010 | 05:36 PM
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Originally Posted by astepup
Would having two diff size tires on the rear for 17K miles screw up the rear end gears/posi unit? A 285 tire IS slightly taller than a 255 isn't it?

astepup said that
Originally Posted by cal55
I believe it's just wider.
Joe
Actually, the 255 is slightly taller. But not enough to even make a difference or hurt anything.
The 285 as stated is wider though.

255/45-17 = Approx. 26.04" Diameter
285/40-17 = Approx. 25.98" Diameter

So, the 255 is 0.06" taller.

That is a general tire calculation. Different brands very well could measure slightly different.
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Old Jul 21, 2010 | 05:46 PM
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Originally Posted by RollaMo-LT4
Actually, the 255 is slightly taller. But not enough to even make a difference or hurt anything.
The 285 as stated is wider though.

255/45-17 = Approx. 26.04" Diameter
285/40-17 = Approx. 25.98" Diameter

So, the 255 is 0.06" taller.

That is a general tire calculation. Different brands very well could measure slightly different.
See? THAT'S why I love this place....always learning something...but wait...that also means I didn't know everything in the first place.....uh oh...maybe my ex g-f was right after all

astepup said that
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Old Jul 21, 2010 | 05:52 PM
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Originally Posted by astepup
See? THAT'S why I love this place....always learning something...but wait...that also means I didn't know everything in the first place.....uh oh...maybe my ex g-f was right after all

astepup said that
Here's more information than you could ever want on tires and wheels.

http://www.tirerack.com/about/techcenter.jsp
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Old Jul 21, 2010 | 06:16 PM
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Originally Posted by astepup
maybe my ex g-f was right after all



They're never right!

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