The overall diameter of 255/40/18 and 255/35/19 are the same. But that does not mean a whole lot because tire manufactures do not adhere to a standard. Meaning tire company A and tire company B with the exact same size tire will not be the same size. One could be wider or narrower than the other.

i dont know if i should spend my money and order new invos 245/40/18, ill be mad if they have the same problem....

My money is on the shorter tires fixing the problem. My 245/40 are pretty close so I can only imagine what 255/40 does.

so 245/35 would be ok? thats ganna lower my car a little more in the front lol. i wonder if it will look odd wit the smaller sidewall in the front than the back

It's hard to determine how bad it's rubbing without pictures. Tons of people run tires that are the same sidewall height as 245/40 without that problem. 245/35 would be significantly shorter for sure. If it is on par with Pdxhak, 245/40 should fix it. If you have it worse, then 255/35 should fix it. 245/35 just seems excessive to me. edit: Different height tires front to rear can cause problems with stability control or ABS or whatever. Not sure how much is necessary to cause the problem though.

ill try to get some pics soon and show how bad the scraps are.

That should give you a fair bit more clearance. 1/4" in overall diameter and 1/2" in width which should pull the 'corner' of the tire in a good bit.
I know it kinda sucks, but it wont truely be wasted money down the road since you'll have a spare set of rear tires already in the garage :)

This sucks, just give me your wheels/tires and I'll let you know if they rub on my car :)

Seriously though, as stated above, not all tires are made equally. Sucks.

take a heat gun to it, soften it and push it back a slight bit.

done. whats the problem?

I don't think he has any plastic left to bend.

If you read the thread then you would know why this will not work.

I'm running 255/35/19 and he is running 255/40/18. The OD theoretically should be the same though. If he dropped to 255/35/18 then the OD would be 1" less. However a 245/40/18 would be .31" less so that would be my choice if swapping tires.

Shijin-Kun,

Where did you buy your tires and how long have you had them? I believe Discount Tires has a 30 return policy if you do not like the tires. Check with your tire company to see if there is a similar policy.

i got my tires from a website called onlinetires.com they only have a 7 day return, plus the tires have a nice cut in and i dont think they would take it

Road hazard protection? If so then they should take them back :)

nope, websites doesnt offer stuff like that but the tires sure are low priced.

Here are some pics:

http://img.photobucket.com/albums/v2...651CST2010.jpg
http://img.photobucket.com/albums/v2...608CST2010.jpg
http://img.photobucket.com/albums/v2...553CST2010.jpg
http://img.photobucket.com/albums/v2...542CST2010.jpg

And here is the wear:
http://img.photobucket.com/albums/v2...526CST2010.jpg

So im about ready to order the 245/40/18, now with pictures will that be enough?

Is there a Discount Tire by you? They will match internet prices. If not then call around and see if any of them will price match so that way you can get road hazard on your next set of tires.

yeah i talked to a discount tire near me and they said they could get me the tires by tomorrow. Hopefully by getting the 245/40/18 ill be ok.

Find prices online that are cheaper before you order because it will save you money. Also see if they still have the 30 day return policy that way if they are too big you can exchange them. 245/40 is .31" smaller per the one tire calculator I used. It would be a good idea for you to run the numbers yourself. Add in the difference between tire manufactures and you could end up with the same size or even bigger tire.

how are you calculating this?

http://www.miata.net/garage/tirecalc.html That's an easy one. The difference in radius is what you need to look at.

looking at it going from 255/40 to 245/40 will not change much. Now since my wheel is 8.5 wide and putting 245 on it would that stretch the tire and make it a lot shorter?

Stretch doesn't shorten a tire any appreciable amount. Also 245 on an 8.5 is not a stretch. Give me a second and I'll get a picture of my car at full lock in the front. 245/40 for me and it's pretty dang close.
http://farm3.static.flickr.com/2705/...09621e24_b.jpg

Wow that is some major cutting. Different tire manufactures definitely have variations in their actual sizes. If you ran the same tire just at 245/40/18 instead, keep in mind that the .31" smaller tire means overall. That means 4 mm (.157") on each side. Judging by those pictures, I take it you may still rub.

Relating to 19s, because that is what I have the most experience with, I know people who run +30 offsets with 245/35/19 (toyos). They rub a bit when turning as well but nothing tire damaging like yours. I do not rub at all with the same tire and a +34 (fyi). A 245/40/18, not factoring in manufacturer differences, is 1 mm less over all. So .5 mm less than those setup I'd say is still rubbing, but no one has ever cut their tires from that.

ahh seeing that makes me say it's going to come down to manufacturer size variations. is your offset +30?