18x10 on the rear sn95. how WIDE can i go with a LOWER suspension without rubbin

blackmustang98_ · May 20, 2011

Hey guys, i have a black mustang and am getting some black chrome fr500 18x9 on front and 18x10 on rear.
now the question is what size tires to go with.
On the rear i wanna put the widdest tire possible but i dont want them to rub,
My car is lowered and before i had 275 with a 1" spacer and i pulled my fenders with the tires....
any suggestions??? and i wouldnt mind having to roll my fenders for fitting, but i rather not.

Thank s a lot

DropTopPony · May 20, 2011

I went with a 295/18. It can fit more but my car is fairly low and the roads suck here so my suspension gets a good workout everyday.

ttocs · May 20, 2011

I can tell you that a 335 40 17 will rub if you are turning hard, with stock suspension but they look cool as hell.

thorco3 · May 20, 2011

There are way too many factors to just be able to pull a number out for ya.

With that being said, 315's are probably the most common tire size as far as wide tires on a 10"+ rim.

Every car is different though, depending on how low the rear end sits, what kind of exhaust is under the car, quadshocks... etc. Some people roll their fenders, use BFH on inner fender well, it all depends on how much trouble you want to go through.

wytstang · May 21, 2011

As mentioned a lot of variables one being the rear spring rates. A soft rate will cause the car to lean on a hard turn and I can guarantee 295's will rub the fender as they sit flush (what I have), 285's however give you more room.
Here is a piture of my car with 285's w/steeda springs & tokico hp shocks

The tires were tucked in enough that they never rubbed on hard turns.
The only pic I have from the rear with the 295's on but it's hard to see due to the shadow how much more further out they are. Just use the rear bumber as a reference and you can get an idea

wytstang · May 21, 2011

Also thank God I went with MM adjustable lowers, as you can see I had to raise the arse end up to stop the rubbing. 10 minutes to raise both sides up =WIN

Musturd · May 22, 2011

Yea it's gotta be low right to the edge with hudge tires.

BLCKSTNG96 · May 22, 2011

295 is NOT guaranteed to rub.I have run a 295/35 /18 forever with no issues.like stated this is a car to car type situation.one of the biggest factors I know for a fact if it rubs and doesn't is good/bad upper control ARM bushings,the reared housing ones in specific.I now run 315/30/18 and they are great.had trouble with shit bushings but after replacing u have to have quite a bit of weight.in the car or take abturn pretty harf,and my car is pretty damn low.

wytstang · May 22, 2011

295's and up are guaranteed due to width whether or not you have the set up to avoid that is another question. 285's and under will not rub the fender since they sit back enough to avoid the fenders all together. That is why sites recommend 285's for 10" rims.
BTW before the 295's went on the upper and diff bushing were replaced (oem bushing as per MM recommendation) and I still had to raise the back end up.

wytstang · May 22, 2011

Looking at the chart I would say the rear H&R sport springs would reduce peoples chances of rubbing due to the high starting spring rate @275.

Musturd · May 22, 2011

Yea bushings make a big difference . I'm running Spherical bushings in the diff with double adjustable uppers with heim joint on the chassis end and perchless lowers with a heim adjustable end. My wheels are half like a half inch gap between the top of wheel well and top of tire And sit nearly flush. Sounds like toiko hp shocks are sloppy.

BLCKSTNG96 · May 23, 2011

I have 295s on my vert too with just springs from a fox so its lower,everything else stock,no issues

JiMi_DRiX · May 23, 2011

I have 295/35/18's in the rear, no rubbing. I have Eibach Pro's as well.

94Pro-5.0 · May 23, 2011

i have 295s and it looks to me like i would have enough room for 335s without rubbing, but i have coil-overs, quad shocks removed, rolled lips, and 1/4" spacers.

Shifty Powers · May 23, 2011

go big or go home lol.. hoping my next set will be 335s

DropTopPony · Jun 23, 2011

Looks like I am going to have to roll the fenders. After a few weeks of daily driving with the 295 Invo's I am getting some rubbing on the outside. I was rolling down the highway @ 90 and took a off ramp that had a nice dip that caused a slight bottoming out and the fender lip actually shaved a slice out of my rear tire. Never had that happen with the 285's I had on for 5 years.

det_riot · Jun 23, 2011

i have 335/35/18s on my car lowered with pro kit and i dont have any issues with rubbing. i did roll the fenders previously bc i wasworried about my 315s but no issues here so far!

Steve@CJPP · Jun 23, 2011

det_riot said:
i have 335/35/18s on my car lowered with pro kit and i dont have any issues with rubbing. i did roll the fenders previously bc i wasworried about my 315s but no issues here so far!

can you get a shadowless pic of the rear so I can see how those look?