I searched all of the registries and found a bunch of people using 235/40/17 tires but none of them have listed how wide their rims are or what offset they are. I need to know if a 235/40/17 tire on a 17X7.5 48mm offset will fit without any major issues.
My real concern is that with such a wide tire and such a inward wheel offset that the tire will rub against the strut / spring perch. Can anyone give me some sure answers???
- 93 mph in the 1/8 mile
Member of J-Body Of Michigan.
if it will help, I'm running 225 45 17's on a 17x8 wheel with a 38 offset. I haven't really felt behind the tire to feel how much room I have from the suspension. I can check if you think it will help.
Desert Tuners
“When you come across a big kettle of crazy, it’s best not to stir it.”
More info to add to the puzzle...
Using the
offset calculator site i have determined a few things.
A 7.5" wide rim with a 48mm offset moves the inner edge of the rim in 20mm closer to the strut than stock and 18mm out closer to the fender than stock.
Now consider that a friend of mine is using a 17 X 8" wide rim with a 45mm offset on his Cavalier, which moves the inner edge of the rim in 23mm closer to the strut than stock and 27mm out closer to the fender than stock. He has had no rubbing issues at all, but is using a 225/45/17 tire.
I also have another friend using a 17 X 8" wide rim with a 35mm offset on his Cavalier, which moves the inner edge of the rim in 13mm closer to the strut than stock and 37mm out closer to the fender than stock. He has had no rubbing issues at all, and is using a 235/45/17 tire.
With all of that info considered it looks like a 235/40/17 tire on a 17 X 7.5" wide rim with a 48mm offset
should work but i'm still not sure. It could be a very expensive mistake.....
Anyone else have any input??????????????
- 93 mph in the 1/8 mile
Member of J-Body Of Michigan.
from the info you just gave i dont think youll have any issues
but dont quote me on that
You also need to consider ride height. Stock ride height might be ok, but the lower the car, the closer the tire is to the fender. You migh tneed to roll the fenders to get the clearance you need.
ln2johnny wrote:You also need to consider ride height. Stock ride height might be ok, but the lower the car, the closer the tire is to the fender. You migh tneed to roll the fenders to get the clearance you need.
My car and both of the other 2 mentioned in my previous post are all on the same springs (Eibach Sportlines). My fenders have been rolled for about 5 years now.
Even more info to add to the puzzle....
Tire diameters of the sizes mentioned above vs stock
205/55/16 = 24.9"
225/45/17 = 25.0"
235/40/17 = 24.4"
- 93 mph in the 1/8 mile
Member of J-Body Of Michigan.
Thanks a ton Vincent, you're the man!
Now 2 questions for you.
1. Did you even try installing and driving on those wheels and tire without spacers, if so what was the outcome?
2. Where did you get the spacers?
- 93 mph in the 1/8 mile
Member of J-Body Of Michigan.
I used to have:
Front:
235/45/17 mounted on 17x7" rim with a +40mm offset
Rear:
245/45/17 mounted on 17x7" rim with a +40mm offset
My car was at the time on cheap coilovers and hacked up stock struts. The car was very low and did not rub the fender.
"Growing old is mandatory. Growing up? Definitely optional."
ln2johnny wrote:You also need to consider ride height. Stock ride height might be ok, but the lower the car, the closer the tire is to the fender. You migh tneed to roll the fenders to get the clearance you need.
ride height has nothing to do w/ it. if you keep the same overall diameter of the wheel your fine. unless hes dropped like 2 1/2" then youd have to worry.
i would of helped but im not sure on the tire size. im running a 7.5" wide rim w/ a 48mm offset but my tire is a 225/40/18
Well, how is it that when a guy's running a big drop they keep the tires from rubbing? I read a how-to a while back where they had this problem on a 240SX or something like that. The wheel/tire combo was way bigger than stock, but they didn't have any rubbing on the fender until they lowered the car. At that point the inner lip started cutting the sidewall. So they rolled the inner lip to get the extra clearance. I kind of guessed from that that ride height would play a factor on how big tires could be. And there was a thread on this forum not that long ago maybe a month or two someone asked if they can fit 235 mm tires and basically he was told no.
I take that back they told him he might have issues with rubbing, and that was I believe on Sportlines... Someone else int hat thread said they didn't have any issues with it. Confusing.
Like i said, im dropped almost 2", im running the exzact setup he is wondering about, and no rubbing AT ALL, not even if i hit a bump. I even have spacers to put the wheels out farther but the fender isnt gonna hit at all on the tire and slice into it. but i do have coilovers so they fit a little better on the inside and give me more room.
Quote:
Im running exzactly what you are asking, 235/40/R17, my rims are 17x7.5 with a +48mm offset. no rubbing but i did have to put on 3mm spacers just to be on the safe side.
Hey Vincent, Im still tryin to understand this offset thing. If your rim offset would have been +45 wouldnt that have been the same as havin the 3mm spacers?
York sir wrote:Quote:
Im running exzactly what you are asking, 235/40/R17, my rims are 17x7.5 with a +48mm offset. no rubbing but i did have to put on 3mm spacers just to be on the safe side.
Hey Vincent, Im still tryin to understand this offset thing. If your rim offset would have been +45 wouldnt that have been the same as havin the 3mm spacers?
Yes, a 48mm offset with 3mm spacers makes it a 45mm offset.
- 93 mph in the 1/8 mile
Member of J-Body Of Michigan.
Not shure if this will help any but Im running a +65mm Offset on a 19x8.5" in the front and a 19x9.5" in the rear. The rims themselves are a +38mm offset but I will be using a 25.4mm 5x100 to 5x114.3 adapter which will give it the proper offset to match up to the flares.
Im running 3.25" EAI Cylinders in the front and rear.(a 1.25" shaft)
