Tire Sizing Help

[BlackenedSVT]

OK so as some of you know, im getting a good deal on some Toyo tires. But the only problem is the closest tire sizing that i can get from them is a 255/40/17 for the front and a 275/40/17 for the rear. Keep in mind i have a '95 Cobra R wheel, 17x9" front and 17x10.5" rear.

Now the middle number of the tire sizing is the size of the side wall in percentage relation to the tread width. And i know you want to keep the overall sizing as close to possible.

IE: my current set up is 245/45/17 (front) and 275/40/17 rear.
That is 245 x 45% = 110.2 and 275 x 40% = 110. So as you can see they are equal.

Now getting back to the Toyo tires...they figure out to:
255 x 40% = 102
275 x 40% = 110

As you can see these are not as dead-on as the other tires i currently have now. So i am wondering if this is going to be a problem if i get these tires, and WHAT exactly will this miss-matched sizing do? Will i have any problems? Bad treadwear? incorrect speedo?

I'm getting a GREAT deal on these toyo tires, and ALL 4 of my current tires are BALD, completely dead. So i would like to know if its ok for me to get these, or if i have to pass up this great deal

 

[Brute03]

i wouldn't worry about that too much, i would be more concerned about how a 275 tire would look on a 10.5" rim. I think it might look a little stretched

 

[Waterdrake]

i've got 10.5" cobras on the back with 275. it does look alittle stretched. if you're gettin an awesome deal on them then go for it. they'll fit. they just won't look quite as meaty. my opinion anyway.

 

[BlackenedSVT]

I have 275/40/17 Nittos on my car now. It does look a little stretched, but i dont care. It fits... They dont make anything bigger

 

[fluffyrunnells]

if its that good of a deal..............go for it man.....cant imagine any huge problems with the match..???......and as far as the 275's on 10.5.....imo does not look that bad..

 

[Stang|ess]

go with 275 all around.

 

[BlackenedSVT]

go with 275 all around.

i'd imagine steering would be awkward then.

I'd IDEALLY liketo have 265/40/17 by 315/35/17s but there are only a few tire brands in those sizes, and i am getting a deal on Toyos. So im stuck with my 255 and 275 dimensions for now