Reeladdict

Hello,

I searched but couldn't really find an answer.

I am looking at potentially doing a squared setup on my 3IS AWD. Looking to run 19x9.5 +43mm all the way around.

My question is what tire size? I already bought a full set of 225/35's and 265/30's for a staggered setup but I ended up not using the wheels. So my question is would it look rediculous to run 265/30's all the way around?

If so, should i be looking for something like a 245/40 all the way around? How stretched would that be?

Thank you!

asapcolin

I run 19x10 +38 square on RSR super downs with 225/35/19 tires.

altezzza

Would you guys recommend a different size in rear wheels if i have a RWD vehicle? jw. I'm liking the 19x10 +38 all around but like i said, im rwd.

Reeladdict

@asapcolin thanks for that! looks sick and makes me want to do squared even more.

Question, hows the stretch with those tires? do you have a picture by any chance?

CLUM

225 on a 10" wide....not what i would consider the most functional or safe setup. If you can't fit at least OEM width tire sizes on your new wheels, i'd rethink how aggressive you want your setup.

r0shiro

iTrader: (1)

exactly...^^^

without doing some major fender work, even I'm running the wrong setup. i have to sadly give in on running 245s on 10s in the front. at least the toy's R1Rs are not as stretchable as others. Held up at the track but ideally you don't want anything less than 265s on 10s. and damn...225s??? O_o you're asking for trouble. if you really want this setup at least get some fender flares and go wide a bit to fit those in the front. If i had to do it again id go 9.5 max in the front.

good luck.

Reeladdict

@r0shiro o if you were going to run 9.5's all the way around, what size tires would you run?

I will be lowered on RSR downs eventually.

CLUM

agreed.

Just go look at the recommended tire widths for whatever tire you are thinking about going with. For example, a Bridgestone S04 PP in 255 recommended wheel width is 8"-9.5". For a 9"-10.5" wide wheel they recommend going 265 as r0shiro mentioned. (FYI 225 tires are meant for 6-8" wide wheels!! )

I'd recommend 255 or 265. 245 Can easily be doable, and will be safe, just has a little stretch. No way in hell I'd go any lower than 245 unless you want to be hellaflush riding on -5* camber and have 1" of contact patch.

Also, whether you can actually fit 255 or 265 tires under the body depends first and foremost on the offset of the wheels you want. If they won't fit without huge camber, then I would get a higher offset wheel. If you like XX offset wheel and it looks like it might not fit with the proper tire sizes, then be prepared to camber a bit, but I would just suggest staying away from hellaflush style setups as a safety precaution. Also, this car deserves better.

It's all a balancing act between desired tire size, desired camber, and desired wheel width and offset. You will have to give and take here and there, but it's up to you to decide what. You can just ask around and look at other setups to see what they are running on RSR downs and how much work it took to fit their wheel setup.

asapcolin

I have not had any trouble with this setup ever, daily driven. And lets be honest, my AWD IS250 would be a joke at the track.... I love the way my car looks, and yes its a decent stretch. Thats just my opinion.

Here are the only pictures i have of it close up.

Reeladdict

Cool! My wheels will be 19x9.5 with a +43mm offset. So not aggressive really. I'm going to try and fit a 265/30 all the way around and see how it goes.

I'm a couple more months away so I'll keep researching. Thanks!

dizlex

Idjit.

"Super downs", too. At least you're consistent. How do you like that 3/4 wheel travel?

P.S. My Supra TT came with 9.5" wheels and 255's in the back, and it's a more powerful car.

DoomBuggy

iTrader: (1)

Running 265s up front sounds just as ridiculous as stretching a 225 over a 10" wheel.

I dont think anyone on this forum has anything near a 265 in front. Correct me if im wrong.

Reeladdict

How do you figure its "ridiculous" assuming the minimum tire size that most would recommend for a 9.5 wheel is a 245/35, a 265/30 is only .79 inches wider thus sticking out about .4 inches over a 245/35.

I would prefer to have as much contact surface on the road as possible, by offset is not that aggressive (+43mm) so I am hoping the 265 will fit and look ok, if not I will try a 255 and finally a 245 if I have to.

1sWt2GS

iTrader: (6)

Theres nothing wrong with this setup plenty of people do it, although be warned it is stretched.

Also, I'm not too sure about the 3rd gen IS's, but in a 2GS a 265 in the front is HUGE and you would definitely have problems with rubbing (and the 2gs can run pretty aggressive wheels)

Personally for me on a 9.5 I'd run 225/35/19. If you are scared to stretch that much a 235/35/19 would also do.

bhvrdr

There's plenty wrong with stretching a 225 tire on a 10" rim. It is outside the tire's manufacturers specification for safe operation. It will give you worse handling then the honda accord sitting next to you in traffic. Your car will not react as it was designed in the event of an emergency or safety related evasive maneuver. It also happens to look like ghetto ricer junk that belongs on a $2000 dollar civic (although the last thing is personal preference, lol).

I would recommend putting the correct size tire for the rim. Get a 245 to 265. There are plenty of AWD cars that come from the factory with 255 all the way around. My Audi did. Then choose the offsets based on the correct tire width and rim width. I dont understand why some people first choose a rim that ridiculously sticks outside their fender and then limit themselves to a 225 tire so they won't rub. This is a crap way of selecting proper wheel and tire packages.

Mike