Quick Question On Tire Sizes.

Dan_T_Mustang · Apr 13, 2011

I currently have 245/40/17 on the front's and 255/45/17 on the rear's. (I bought the wheels with these tires) And the front's are practically brand new but the rears are shot, I want to get 255/40/17's or 275/40/17 instead of 255/45/17, cause I find the 45's have too much sidewall for my liking, how will my combination look?

Thanks,

OnyxCobra · Apr 13, 2011

255/40 is a little short and 275/40 is gonna look about how it looks now, slightly shorter. 245/45-17 or 275/40-17 are the correct sizes for our cars. 255/45 was OEM on 94/95 Cobras.

Dan_T_Mustang · Apr 13, 2011

OnyxCobra said:
255/40 is a little short and 275/40 is gonna look about how it looks now, slightly shorter. 245/45-17 or 275/40-17 are the correct sizes for our cars. 255/45 was OEM on 94/95 Cobras.

I see, thanks a lot, how would 255/40/17's look all the way around? Anyone have pictures? I'm on a budget so I wanted to keep the front's even though they aren't exactly the right size but if I have to, what are some affordable performance tires? As of now I'm thinking Fuzion ZRi's.

Naptown_Stang · Apr 13, 2011

40 series sidewall unless its 275 will throw off your speedo I would not recommend this. If you want a smaller sidewall upgrade to 18s. nitto NT05s are great for the price but dont las long. I would look into Kuhmos for you but really you get what you pay for.

Dan_T_Mustang · Apr 13, 2011

Naptown_Stang said:
40 series sidewall unless its 275 will throw off your speedo I would not recommend this. If you want a smaller sidewall upgrade to 18s. nitto NT05s are great for the price but dont las long. I would look into Kuhmos for you but really you get what you pay for.

So it looks like 245/45/17's in the front's and 275/40/17's in the rear's are best for what I have which are 1999 Cobra's? And that will look pretty close in terms of sidewall or no?

Naptown_Stang · Apr 13, 2011

thats what i have its as close as you can get. these wheels are 9 inch wide right?

Dan_T_Mustang · Apr 13, 2011

Naptown_Stang said:
thats what i have its as close as you can get. these wheels are 9 inch wide right?

They're 8" I'm pretty sure, I shouldn't have too much problem would I? I know the 275's will have a bit of tire bulge though.

Naptown_Stang · Apr 13, 2011

holy jesus, anything over 245 is wayy too wide for 8's 245/45/17 all around. talk to a tire rack rep or whoever you are buying your tires from. they will set you up with what you need

OnyxCobra · Apr 14, 2011

OP having tires that are too short tend to look weird, like they're too small for the wheel well (cause they are) I ran 275 nitto DRs on my 8" rims for several years with good luck but the middle of the tread wore faster than the outside because they were bowing a touch, they didn't look bad on there at all though. I just checked and 255/40 is a good deal shorter than stock, I wouldn't do it but then again I'm pretty anal when it comes to tire sizes.