I'm looking to run some 285/35-18 RS-3's on a 18X10.5 +22 up front but I am worried about INNER clearance, the tire contacting the upright. I did a lot of research but could not find an answer, the wheel itself clears and ive seen 265 and 275s on that size wheel but no dice with the 285. I did find this..

His effective 18x10 +30 has 2mm less inner clearance than the 10.5 +22 and with a wider tire. This makes me think that the setup I'm going for would work, but its the only verification I can find and would like a little more before I pick up my wheels.

I would like to avoid a spacer for the time being or I would just pull the trigger and buy the wheels. If anyone can verify if this will fit or not, that would be great. Thanks in advance guys.

 

I run 19x10.5 +17 with 275/30 about -2.5* camber and they clear inside fine they slightly rub if I hit a bump while cornering hard. Just enough that there is a shiney spot on the inside of the fender, I planned to roll the fender but it happens so rarely that I have never really got around to rolling them. So it would work out to your +22/285 should sit where my +17/275 sits

 

Anything will "fit" with enough camber.

I'm pretty sure some of the fat tire guys run that size on rpf-1's

 

I ran it for a while on an 18x10.5 +15. it's no thang. will rub a bit.

 

I'm asking about INNER clearance. I'm not at all worried about the fender, many are running this tire on +15 RPF1's and that sits 7mm farther toward the fender.

Again INNER clearance. I dont want to rub the upright. I guess I shoud have made my question shorter so people would actually read it...

 

I ran 19x9.5 +35 up front before... my tire was 255/35 though. It didnt rub fwiw

 

I don't know if you're trying to avoid all spacers but if it does rub, nothing a 5mm slip-on spacer won't fix.

 

You should be fine. My setup is mere millimeters from rubbing (with just a 3mm spacer it DID rub occasionally) but your tire should not be any wider than mine.

I also have a 285/30/18 v710 I used to run on the same 18x10+35 rim and all I needed was a 3mm spacer to keep the rim itself from rubbing a groove into the aluminum upright. You will be close but you should just make it as well assuming the inner lip on your wheel is physically similar in size to an Advan RS.

The camber suggestion only applies to outer clearance with the fender. Whether you have -.5 or -3.5 up front, inner clearance will be the same.

 

285/35 is a BIG overall diameter compared to stock up front. You would need a 295/35 or larger (O.D.) in the rear to make that work.

I think you would be really close to rubbing, too many variables like camber and ride height.

I run a 275/35 up front +22, on -1.5 camber and a moderate drop and it works, but its a tight fit and Im only on a 9.5". That inner clearance on mine is very small though. Good luck!

 

Thank you, I saw your post from the track wheel and tire thread. I was worried that it may have been a typo on your offset. When you remove your wheel, does your upright have marks on it from rubbing during heavy continued cornering? Thanks again, I guess it's time to pull the trigger on my wheels.

 

285/35/18 up front is awesome. I run 285/35/18 all around on 18x9.5 +15 RPF1s for my street set-up and back-up/wet autox/track:








Your wheel is essentially 7mm more "in" based the offset delta, and 12mm more "in" from the added 1" of wheel width. If you asked me if I had almost an inch of clearance on the inside, I would say no (but I could measure).

Alternatively, I have run 285/30 on 18x10.5 +15s with success. Your set-up is only 7mm more "in" than that set-up, I can only comment that I know it'll be close.

My current track set-up is 285/30 on 18x10.5 +27 wheels, but I run a 13mm spacer. I could do a test-fit with a 5mm spacer to see how they fit, but I don't think it's enough spacer.

My last semi-appropriate example is the set of 17x10 +25s I used to run with oversized 275s. They were >< close to hitting the suspension, to the point where I ran a 3mm shim spacer. Your 10.5 +22 "sits" more "in" than that wheel by about 3mm.

What's the take-away here? I would have to err on the side of caution and say that the 10.5 +22 will not fit with the 285/35 tire without at least a 5mm shim (slip-on) spacer. If you can wait until this weekend, I can put my 10.5 +27 wheel on with a 5mm spacer to make sure. But gun-to-my-head today, I would say you shouldn't order them unless you'd be ok with the slip-on spacer.

 

No VDC, no problems! Variables like ride height and camber do not affect how close the wheel/tire combo is the the upright.

 

Should have put some pictures or cliff notes.

 

Scott, Please do this. What do you think about INTIMAZY running the 18x10 +30 up front with 305? He says he clears, so I should be golden. Looking forward to the test fit, let me know. Thanks.

 

As you said, the 10 +30 sits about 2mm more "in" than your 10.5 +22. His 305/30/18 tire, however, is 25.2" tall. Your 285/35/18 tire is 25.9" tall. The inner suspension piece that I'm worried about has an arch, so the taller tire may interfere. That's exactly where I was concerned with the 17x10 +25 275/40 (26.7" tall), hence why I ran the 3mm shim. I should be able to get to my storage unit to grab the 10.5 +27 wheels to do the test-fit. Otherwise, next Friday, 10/7, at the latest (track day).

 

Okay I see what you mean. Thanks for the information.

 

Way to many different numbers, set ups, and examples in this thread.

 

I do in fact have a few "marks" on my upright but they are no more than 1mm deep (really, scratches)

What appeared to clear without noises or marks after a test drive around the block did not make the cut when I flogged it on the track. I think there is some small slack in the hub and bearings that I just had to work out with trial and error. Right now, my 18x10 +30 (effective) with 305 v710s makes the cut even on the track. I don't have any new marks on the upright and my inner rim does not show any scrape marks or loss of finish.

That being said, you can go by my specs if you REALLY want to cut it close on inner clearance assuming the actual dimensions of your rim are similar to my Advans. I would probably just go with a lower offset to start with and deal with the fender issues as they arise. It's easier to find an extra 5mm from the fender side than to find out the hard way that your rim is a few millimeters off width-wise from what they "should" be and need to make clearance from the inside.

I have a roadcourse autox this Sunday, I'll take a few pics of the front tires and clearance underneath when I swap tires.

 

Sounds good. Thank you. My wheel choice is has 2mm more inner clearance than yours but I will wait to buy them untill I hear back from Scotts300 on what he finds with his test fit. Pictures of your clearance would be great too. Thanks again.

 

I'm one of the people that ran a 18x10.5 +22 upfront with a wide running 275/35/18. Inner clearance was close but never rubbed, and never needed a spacer. I would imagine that a 285 would be fine also... The rim was close but there was room for more tire...It depends on how wide the tire actually is...

edit..funny cause now I have the 285/35/18 rs3s on a 10.5 but with a +15 offset...the +22 offset 10.5 was with starspecs...last tire setup