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[fboutlaw]

Is anyone running 285/30-18's on Apex Arc-8 wheels in the rear?

I'm currently at 275/35-18 with PSS's and have had zero rubbing issues. It looks like I can fit 1mm extra of tire in there, but don't want to go in blind. If anyone has experience or thoughts, let me know.

[Clovef]

I read about someone running that size r3 and got it on by loading the suspension and compressing the spring during instal. I think he rubbed.

[fboutlaw]

Originally Posted by Clovef

got it on by loading the suspension and compressing the spring during instal. I think he rubbed.

I don't understand this. There won't be any install issue with the car jacked up to get the tire on. The question is how bad I will rub on the outside and if there is enough room.

[Clovef]

Here is the thread.
http://www.1addicts.com/forums/showt...ght=Arc8+tires

[GaryS]

Here's a thread about 275 NT01 rear rubbing on the chassis and requiring a 5mm spacer. I also know another person who uses a 5mm spacer to keep those tires from rubbing.

http://www.1addicts.com/forums/showthread.php?p=9496900

Ignore the stuff about rubbing in front in that thread because they're talking about et38.

[fboutlaw]

Originally Posted by GaryS

Here's a thread about 275 NT01 rear rubbing on the chassis and requiring a 5mm spacer. I also know another person who uses a 5mm spacer to keep those tires from rubbing.

http://www.1addicts.com/forums/showthread.php?p=9496900

Ignore the stuff about rubbing in front in that thread because they're talking about et38.

Thanks for the link. Unfortunately, I'm an idiot and am going to make this work... because racecar!

After talking to Evolution Racewerks today, they confirmed that the ADVAN's 285/30-18 fit in the rear without modification if you get the offsets right. I may need 3mm spacers, and a fender roll... but we'll see!

[Clovef]

Please post it up when you do it. Sexy sexy.

[BadM4]

i have 285 555rs on my apexs

[1&done]

FYI if the tire is too big for the wheel, (which most 285s are, for a 9.5in wheel) than you would lose performance...ie turn in if you are tracking.

[cpt97m3]

Originally Posted by fboutlaw

Thanks for the link. Unfortunately, I'm an idiot and am going to make this work... because racecar!

After talking to Evolution Racewerks today, they confirmed that the ADVAN's 285/30-18 fit in the rear without modification if you get the offsets right. I may need 3mm spacers, and a fender roll... but we'll see!

Let me know when you try it. I was thinking of doing the same thing.

[fboutlaw]

Originally Posted by cpt97m3

Let me know when you try it. I was thinking of doing the same thing.

Tires are getting mounted this Friday. Will post pics it it works.

[flinchy]

Originally Posted by 1&done

FYI if the tire is too big for the wheel, (which most 285s are, for a 9.5in wheel) than you would lose performance...ie turn in if you are tracking.

everywhere i can find says 285 definitely fits on a 9.5... when a 305 fits on a 10.

[1&done]

Fitment is one thing, performance is another.

I am shopping for r-comps and my performance shop wants me to drop down in size for proper fitment and overall performance. I was under the impression the wider the tire the better the traction. Post pics when you get them mounted. GL

[flinchy]

Originally Posted by 1&done

Fitment is one thing, performance is another.

I am shopping for r-comps and my performance shop wants me to drop down in size for proper fitment and overall performance. I was under the impression the wider the tire the better the traction. Post pics when you get them mounted. GL

lip size is 1" above wheel width, then you can go 1" above that again with minimal bowing (sidewall not mushy yet)

[ptack]

Tires are designed for specific wheel widths. If you mismatch a tire and rim you will not get the optimal performance from the tire. Most people may not notice, but if you're competing on a track you will notice and if you're prettry far out of spec you may even manage to unseat the bead.

[Freon]

http://www.tirerack.com/tires/tirete...jsp?techid=198
http://www.tirerack.com/tires/tirete...jsp?techid=199

Tirerack lists the one Measured rim width, and a range (usually 0.5" under to 1.0" over measured).

Tirerack lists the 285/35/18 PSS as 9.5" to 11", with measured of 10".

[fboutlaw]

So rarely do I get to use this but...

Boom Shaka Laka!

285/35-18 Yokohama ADVAN NEOVA's on Apex ARC-8's


Clearance inside:


To Outside... I can't get a good image because it's very tight.


Rubber!


Conclusion:
They work, but I haven't maxed out the suspension or pulled the springs to check clearance all the way up. If there's going to be any issue, it's going to be on the outside, which can most likely be remedied with a fender roll. To keep the clearances where they're at, I'm going to replace the links with M3 variants so that there's no bushing play and check clearances while the suspension is apart in the next few weeks.

So far... slam dunk! And they ride soooo much better than the PSS's

[funseries]

Originally Posted by fboutlaw

So rarely do I get to use this but...

So far... slam dunk! And they ride soooo much better than the PSS's

Wow nice work , I always wondered how much space is back there with the Apex's. Seems like quite a bit of room between the wheel and the strut too.. so why do I see people saying they need to add spacers and stuff to fit 265 or 275s?? Maybe it's a ride height issue.

[cpt97m3]

That looks great! Did you end up using a 3mm spacer? I have those same wheels with 275/35 Dunlops, and they fit fine with no spacer, so I was wondering if I could clear the 285 Yoks. I may try that when the Dunlops are worn down, which is coming up soon.

[fboutlaw]

Originally Posted by cpt97m3

That looks great! Did you end up using a 3mm spacer? I have those same wheels with 275/35 Dunlops, and they fit fine with no spacer, so I was wondering if I could clear the 285 Yoks. I may try that when the Dunlops are worn down, which is coming up soon.

No Spacer. The wheels are just bolted on.

With any kind of spacer and this setup, you will rub on the outside. It's tight.

[1&done]

Nice work! I had to run a 3mm spacer w/ my Dunlop 275/35s. I actually did a fender roll and now use a 5mm and I feel more comfortable. I noticed some rubbing on the plastic inner fender. You likey more than the PSS eh? I am kinda low and about -2.5 camber in the rear.

[fboutlaw]

Originally Posted by 1&done

Nice work! I had to run a 3mm spacer w/ my Dunlop 275/35s. I actually did a fender roll and now use a 5mm and I feel more comfortable. I noticed some rubbing on the plastic inner fender. You likey more than the PSS eh? I am kinda low and about -2.5 camber in the rear.

Right now, the pics are with dinan springs, which are over an inch lower than stock, but the camber is only at -1.5 deg. It's pretty clear from the pictures I can go a bit further negative now, which I plan to do next alignment.

The nice thing about the yokos is the 30 aspect ratio rather than the 35 on the pss. I did have some minor wear on the inner liner with the 275's and -2deg camber, but now with less height on the tire, I don't expect that to be an issue.

And I'll let you know how the comparison is with the PSS next month after autox on the yokos. The PSS are great once they warm up on the track, but not great cold. The yokos are expected to be a bit better cold based on lower tread wear. Also, they are MUCH quieter as the PSS sound like hollow r-comps.