[Mustang RacR94]

ok sorry if this repost, I posted before and it didnt come up on my browser

Just bought rims 17x9 for the front and 17x10.5's for the back

im getting 315/35/17s for the back

can I go with 245/45/17s for the front? or should I go with 275/40/17s for the front??

I just dont want problems with the ABS or traction

[LGHTNG02GT]

personally i would put a 255/40 on the front. but thats just me.

[Mustang RacR94]

someone said that would thru it off because of overall diameter or something on my other post

[LGHTNG02GT]

i used to have 245/45's on the front of my car and 255/45's on the back. i didnt have any issues but maybe my car is a freak haha. i'd have to look at the overall heights of the tires. maybe a 255/45 would be a better match to a 315/35

[Mustang RacR94]

anyone with some more input?

id like to order these tires today

[ReverendDexter]

I'd go with 255/40s, myself.... and I did. my 17x9s have 255/40 RA1s on them right now

Now all I need is to do the 5-lug swap so I can actually put them on the car, hahaha.

[1rnkpny]

The 315/35/17 and the 245/45/17 have the same sidewall height. You'd be safe with that. I think that would look killer as well.

[Mustang RacR94]

thanks

[idesigner]

I have 17x10s on mine, how do you find out the maximum size tire that will fit without issues of any kind? I have 285/40 on the back and regular 245/45 on the front. I'm curious cause I am thinking about changing out the rims for 18" and need to know what the maximum width/aspect they can be?

[97mustanggt]

with a 245 up front ur rim lip mite be exposed a lil too much, i just purchased some 255/40 for my 18x9

[ReverendDexter]

Originally Posted by idesigner I have 17x10s on mine, how do you find out the maximum size tire that will fit without issues of any kind?

Depends on how you definite "fit" and how you define "issues".

In general, you start by taking the rim width and converting it to millimeters. So, for a 10" rim, you're looking at 254mm. Based on that number, you can determine min/suggested/max tire sizes by using the following:

Minimum - 100%
suggested- ~120%
Maximum - 130% (Some guys say 135%)

Obviously, these won't get you section widths you can actually buy, so you'll have to fudge your result to the closest available tire size.

So, for a 10" (254mm) rim, that gives you 255/305/325
9" (228mm) gets 235/275/295
8" (203mm) gets 205/245/265

For a cornering car, you'd want something between suggested and minimum.

[idesigner]

Thanks for that info that is really helpful!

[Mustang RacR94]

245's are the stock tire size on machs and I bought stock size rims for it, so theres no rim lip exposure issues

[97mustanggt]

yea but stock rims are 17x8 a 245 is pretty flush with it, but on a 18x9 a 245 tire leaves tha lip to exposed

[ReverendDexter]

Originally Posted by 97mustanggt yea but stock rims are 17x8 a 245 is pretty flush with it, but on a 18x9 a 245 tire leaves tha lip to exposed

I would never call 245s flush if they're mounted on an 8" rim. The tire is going to stick out 3/4" of an inch past the wheel on both sides.

[97mustanggt]

for a 97 gt, wat is tha stock rim size?

[ReverendDexter]

Originally Posted by 97mustanggt for a 97 gt, wat is tha stock rim size?

I think 16x7, with optional 17x8s.

Ford uses 225/55s as the stock size tire on the 16x7s, and 245/45s on the 17x8s.

[97mustanggt]

ok yea i got tha 17x8 with 245/45s and it like perfect but for a 18x9 it aint

[1rnkpny]

I have 255/45's on my 9.5's". 245/45 will suit a 9" just fine. Remember, we're only talking 1cm. The difference between 9" and 9.5" is 12.25cm.

[89StangGT]

I have 245/45/17s on my 17x9s, and 315/35/17s on my 17x10.5s with no issues.