Should I risk it and try 285s? [Archive]

purplenurple

03-16-2009, 08:29 PM

I have almost made up my mind to go along with this, but want some final input. I have 9.5in rear wheels with a 57 offset. I currently am running 275 Toyo T1Rs, and want to move up to 285s.

I was just in the garage putting weight in the trunk with the drag bags deflated, and they seem to clear the untouched quarter panel lips under compression. Its a very tight fit on the inside, though. I cant even get my index finger between the inner panel and wheel/tire. I had some rubbing on the inside but utilized a big fucking hammer to remedy it.

I feel that I should be able to bend away/smash the metal on the inside that may make contact, and I do have drag bags in the back right now. I plan on lowering the car once I am positive that there wouldnt be rubbing.

I would prefer input from people with experience in this area (clearencing on the inside, corvette wheels with similar specs, etc...).

For reference, CCW 10in rears have a 54et and I should have 3mm inside and 9mm outside extra clearence

Thanks

8ball

03-16-2009, 08:35 PM

Honestly, if I had your offset, I don't think I'd have a problem at all running 285's ... however, I've heard Nitto's run narrow, so my perception of 285 is different than what you would be running. Honestly, I don't think much would be gained by bumping up to 275's, but the potential for disaster with 285's makes me never EVER want to run aftermarket wheels that won't fit perfectly in the stock fenders. I'm just a vagina tho.

purplenurple

03-16-2009, 09:01 PM

8ball

03-16-2009, 09:22 PM

Nitto is owned by Toyo, I believe. Toyos are also supposed to run narrow and have a rounded off shoulder.

My quarter panel lip is untouched and I've have zero contact even with stock saggy springs. I have 13mm of extra clearence than you. My concern is mainly for the inside

Inside, outside ... my opinion is still that it likely won't make much difference in handling/traction, but could potentially be a heaping headache. I wouldn't risk it, but I'm biased due to my current predicament.

Mikey340

03-16-2009, 10:05 PM

I plan on going with 285s when my current Toyo 275's need to be replaced.
There's a few CCW and ROH guys running 285 Toyos from what I've read?
If you grind/roll your lip there shouldn't b any issue, except maybe on the inside BFH or small spacer 3-4mm should do the trick.
Mike
BTW if they don't work for you send them to me I will get them to work:)

purplenurple

03-16-2009, 10:31 PM

Mikey340

03-16-2009, 10:52 PM

The trick is not having to mod the lip

Ah ok. Then you'll really have to use the BFH on the inner fender.

purplenurple

03-16-2009, 11:02 PM

Ah ok. Then you'll really have to use the BFH on the inner fender.

I am really trying to convince myself that the inside will be fine, since flink was able to make sufficient clearence on the 10in CCWs with Toyo 285s, and a crazy 1.5-2in drop.

The outside would also be close

If I decide to not be a vag, I would pretty much be testing the limits of tire fitment on an unmodified GTO body, unless some BFHing is considered modifying

mooninitesunite

03-17-2009, 12:51 AM

Get KWs and go for it. (make sure to change your camber, too).

sprocketeer

03-17-2009, 06:40 AM

Try it and see.

ddawson

03-17-2009, 08:39 AM

Got your PM.

I had to hammer the crap out of the inner well. The tire still makes contact with the Big Bore shocks going into steep driveways.

I'll be removing the dust covers this weekend.

If the lip was still there the tire would have been shredded. I say go for it but be prepared to make further changes as necessary.

purplenurple

04-19-2009, 06:15 PM

Try it and see.

Thats easy to say. At 250-300 per tire, this isn't a cheap experiment.

Got your PM.

I had to hammer the crap out of the inner well. The tire still makes contact with the Big Bore shocks going into steep driveways.

I'll be removing the dust covers this weekend.

If the lip was still there the tire would have been shredded. I say go for it but be prepared to make further changes as necessary.

Big bores are a larger diameter than stock, and other replacements, correct? I have about .75in of clearence on the shock right now, and .25in to .5in on the vertical part of the inner-well thats right next to the shock. The ride height is 2 fingers fender gap, so camber shouldn't be to negative with these measurements.

The shock clearence would be my biggest concern because its not easy to modify, but seeing people with Z06 wheels with similar specs and 275 KDW2s and you guys with the 10in CCWs + 285s gives me some confidence, and I guess I could just keep the bags in there a bit longer until I find all point of rubbing.

Also, if anyone has a source with good prices let me know. Cheapest I've found is 516 for both tires + $60 shipping and taxes

cisco

04-19-2009, 07:50 PM

The trick is not having to mod the lip

I'm running 285 30 19s on 10" Drift-Rs. I had to roll my fenders, but that left me with some slight rubbing during hard cornering so I installed Pedders drag springs, which took care of the rest.

purplenurple

06-24-2009, 11:42 AM

vs. OEM 235s

http://img222.imageshack.us/img222/3540/cimg3183.j pg

el Hefe

06-24-2009, 11:57 AM

285's? :turbonaug

NeroGTO

06-24-2009, 12:04 PM

Nice! Much better than stock. :) I also wonder if I could fit anything larger without mods, but I don't think I wanna hassle finding out. The tires I have should last a while anyway as much as I drive. Good luck.

purplenurple

06-24-2009, 12:08 PM

Yep, 285s. I don't have my car here to compare to the 275s that are on there, so I decided to use some stock 18s I have for reference.

I am hoping to fit these without touching the q-panel lips *crosses fingers*

svede1212

06-24-2009, 12:18 PM

i widened my stock 17s to 9" which of course adds all of the offset to the inside. i also put on 5mm wheel spacers which brought it back out that much for a net gain of ~20mm offset. i put on Firestone Fire Hawk Wide Oval 285s on my car with 20mm drop springs and mildly rolled my fenders. it's a close fit both inner and outer but i can bottom out my springs without any rub.

zech912

06-24-2009, 12:23 PM

For reference, CCW 10in rears have a 54et and I should have 3mm inside and 9mm outside extra clearence

when you say this, I agree with you, as far as wheel itself. however, assuming the 285 fits on 9.5 basically same as on 10, I see no way around that you have 3mm LESS on inside.

love that pic 235 vs 285. what a difference!

purplenurple

06-24-2009, 12:28 PM

when you say this, I agree with you, as far as wheel itself. however, assuming the 285 fits on 9.5 basically same as on 10, I see no way around that you have 3mm LESS on inside.

love that pic 235 vs 285. what a difference!

The 285 will be a bit more squeezed on a 9.5 vs. a 10, and the overall width will be a teeny bit less. And not counting the tires, my 9.5s have 3mm MORE clearence on the inside over the 10s. (Offset means nothing without width!)

zech912

06-24-2009, 12:41 PM

as i said, I agree with your calculation on wheels, and i fully understand how offset works.

but offset means everything on tires, not counting any 'squeeze' you might gain on the tire by putting it on 9.5, you have 3mm less for the tire than if you had 54 mm offset, whether 9.5 or 10, do not kid yourself. you are not changing wheel, u r changing tire.

purplenurple

06-24-2009, 12:48 PM

as i said, I agree with you on wheels, and i fully understand how offset works.

but offset means everything on tires, not counting any 'squeeze' you might gain on the tire, you have 3mm less for the tire than if you had 54 mm offset, whether 9.5 or 10, do not kid yourself. you are not changing wheel, u r changing tire.

Yes, obviously I have 3mm less with a 57et over a 54et on a 9.5 in wheel. But this is not the comparison. It is to the 10in wheel with a 54et.

A 54et is NOT the same on a 9.5 as on a 10. If you do not agree with this statement, then you do not understand how offset works.

zech912

06-24-2009, 01:00 PM

ok, say you have 0 offset on a 5" rim and 0 offset on a 10" rim. and say you had 10" of space. for the wheel itself you would have 2.5 inches on both sides of the 5" rim, and 0 room to spare on the 10". now say that you put on a tire that measured 10" across, and say that it could fit on either wheel (which it could not of course on 5" wheel, but for illustration). do you see that the only difference in fit is the 'squeeze' that would occur on the 5" wheel? it is still the same 10" tire fit on a wheel mounted at mid-point, which is 0 offset.

dude, i am just trying to help. forewarned is forearmed. if you do not see that except for the way the tire fits on the diff between 9.5 and 10, you have lost 3mm, it is you who does not understand offset.

purplenurple

06-24-2009, 01:06 PM

ok, say you have 0 offset on a 5" rim and 0 offset on a 10" rim. and say you had 10" of space. for the wheel itself you would have 2.5 inches on either side of the 5" rim, and 0 room to spare on the 10". now say that you put on a tire that measured 10" across, and say that it could fit on either wheel (which it could not of course on 5" wheel, but for illustration). do you see that the only difference in fit is the 'squeeze' that would occur on the 5" wheel? it is still the same 10" tire fit on a wheel mounted at mid-point, which is 0 offset.

dude, i am just trying to help. forewarned is forearmed. if you do not see that except for the way the tire fits on the diff between 9.5 and 10, you have lost 3mm, it is you who do not understand offset.

I agree on the tire fitment tid-bit, but still X et will provide a different amount of clearence inside AND out between wheels of widths A in and B in.

By your logic (my 9.5in 57 et wheels have 3mm less inside clearence when compared to 10in 54 et wheels) the stock 8in 48et wheels ONLY have 8mm more inside clearence when compared to a 10in 54 et wheel.

Maybe we are misunderstanding each other, but the offset is DEPENDENT on the width

zech912

06-24-2009, 01:27 PM

please at least check with Melissa over there at ccw and ask her if what i am saying is true before u make the investment. perhaps you can still get there with bfh, but you should be prepared.

edit: just wanted to add, the unusually tight fit on inside you already have is an indication.

jittrbugg

06-26-2009, 08:06 AM

I agree on the tire fitment tid-bit, but still X et will provide a different amount of clearence inside AND out between wheels of widths A in and B in.

By your logic (my 9.5in 57 et wheels have 3mm less inside clearence when compared to 10in 54 et wheels) the stock 8in 48et wheels ONLY have 8mm more inside clearence when compared to a 10in 54 et wheel.

Maybe we are misunderstanding each other, but the offset is DEPENDENT on the width

If you go with 285 then go with Toyo T1R you will still have to use the BFH to get them to work. If you go with another brand you will be beating the hell outta the fenders to get them to fit.

Melissa

purplenurple

06-26-2009, 08:58 AM

If you go with 285 then go with Toyo T1R you will still have to use the BFH to get them to work. If you go with another brand you will be beating the hell outta the fenders to get them to fit.

Melissa

Yes, they are Toyo T1-R and getting put on today.

I've already made some extra room inside with a hammer, I'm just hoping that I've no issues with the control arm or shock.

jittrbugg

06-26-2009, 11:55 AM

Yes, they are Toyo T1-R and getting put on today.

I've already made some extra room inside with a hammer, I'm just hoping that I've no issues with the control arm or shock.

I hope the tires fit with no issues. Man you don't know how much I hated having those wheels leave the shop today looking like they did!!

If it had been late in the day when you came, I would have just sat down (on my own time) with them and polished them till I was happy. ;)

Melissa

purplenurple

06-26-2009, 02:13 PM

I hope the tires fit with no issues. Man you don't know how much I hated having those wheels leave the shop today looking like they did!!

If it had been late in the day when you came, I would have just sat down (on my own time) with them and polished them till I was happy. ;)

Melissa

Well, they fit.... but I'm driving around with the drag bags at 15psi. I have tap on the lips and some metal polish on the tires to look for rubbing. I'll play with it tomorrow to see what the clearence is like under spring compression.

The clearence to the control arm kind of bothers me, I can barely fit my index finger between it and the tire, so .5in or less.

It makes me LOL a little how I look a bit like a drag racer.

I don't know if its paranoia or something, but the rear/steering feels more sloppy. Could it be the tires rolling over, or maybe they are still greasy :confused: . My buddy's dad's CLK63 black series comes with the same size wheels and tires (pirelli) so I'd like to think they've done their HW on this wheel to tire fitment.

http://img37.imageshack.us/img37/8016/cimg3189v.jp g
http://img198.imageshack.us/img198/3573/cimg3188.j pg
http://img198.imageshack.us/img198/1179/cimg3187h. jpg

Heres one for Melissa to show that I do take care of the wheels :wall:
http://img120.imageshack.us/img120/8999/ccwquickwa sh003pl5.jpg

On and, again, thanks Melissa for getting this taken care of for me and for the nice price

4MuscleMachines

06-26-2009, 05:06 PM

The way you are describing your situation, you should be fine. I also ran Nittos 285s and had zero rubbing issues but had my fenders rolled.

AdamViper88

06-28-2009, 12:35 PM

How much did you have to use the BFH? Cause I'm putting pedders +5/16" rear springs with drag bags on next week and buying drift-r's 18x8 & 18x10 with 245 and 275 (being safe) in a month or two but I would like to put 285s or 295s on the back without too much work if it's possible. Also sometime between now and then I plan on getting my fender lip cut.

thedak

06-28-2009, 01:17 PM

Looks good Purple

purplenurple

06-28-2009, 02:00 PM

How much did you have to use the BFH?

Not too much considering that my hammer and mallet are weaksauce. I need a bigger hammer to make some extra clearence, but I'd like to have more room than necessary just in case.

Keep in mind that I've not deflated the drag bags yet to see how much room I have under spring compression.

Looks good Purple

Thanks :)

dak and others with CCWs (and preferably 285s), how much room do you have between the tire and control arm and the tire and the vertical part of the inner wheel well at static ride height?

I have probably .5in or less but I don't know if thats enough to not rub when driving

Unknown

06-28-2009, 02:08 PM

Yay someone else with 285's.

Havoc

06-28-2009, 03:16 PM

I have probably .5-1in but I don't know if thats enough to not rub when driving

A half inch is a mile! Stock front tire to strut clearance is less.

MoNsTeR

06-28-2009, 03:22 PM

Not too much considering that my hammer and mallet are weaksauce. I need a bigger hammer to make some extra clearence, but I'd like to have more room than necessary just in case.

Keep in mind that I've not deflated the drag bags yet to see how much room I have under spring compression.

Thanks :)

dak and others with CCWs (and preferably 285s), how much room do you have between the tire and control arm and the tire and the vertical part of the inner wheel well at static ride height?

I have probably .5-1in but I don't know if thats enough to not rub when driving

Purple how big is the stock lip?Do you know a guesstimate?lol Im just curious because im ready to take the 285 route myself.

Reason im asking is i have my whole lip removed and there "seems" to be enough for 10mm more clearance even with my +45...

purplenurple

06-28-2009, 03:32 PM

A half inch is a mile! Stock front tire to strut clearance is less.

Yea, but the space between the strut and tire is fixed. I figure the stock rubber bushings back there allow for a good bit of movement.

But if .5in is plenty to accomodate for the movement then :turbonaug I'll have that much less to bash in for peace of mind.

Purple how big is the stock lip?Do you know a guesstimate?lol Im just curious because im ready to take the 285 route myself.

Reason im asking is i have my whole lip removed and there "seems" to be enough for 10mm more clearance even with my +45...

Sorry, I've no idea and I can't check right now. Mine are still untouched, and I'd prefer to keep it that way. I'd not try 285s with your wheel setup.

MoNsTeR

06-28-2009, 04:18 PM

Yea, but the space between the strut and tire is fixed. I figure the stock rubber bushings back there allow for a good bit of movement.

But if .5in is plenty to accomodate for the movement then :turbonaug I'll have that much less to bash in for peace of mind.

Sorry, I've no idea and I can't check right now. Mine are still untouched, and I'd prefer to keep it that way. I'd not try 285s with your wheel setup.

Not what i was looking to hear lol...I have over a finger of space between the tire and fender so It will be tight but it MIGHT fit..Ill probably try it when these wear out..

Havoc

06-28-2009, 04:59 PM

Yea, but the space between the strut and tire is fixed.

I thought you were referring to a fixed position, (tire to control arm). Nonetheless, if .5 is the closest potential non-fixed contact point that's still not too bad but as you stated the rubber bushings don't help matters. The side walls on the larger tire with that wheel will also, unfortunately, have more lateral compliance than the old tires as well.

Jontall

06-29-2009, 03:52 AM

I never thought a 285 would fit. Do Toyo tire run narrow?

purplenurple

06-29-2009, 05:20 AM

I guess that the Toyo 275s run a bit narrow, but the 285s seem pretty damn full sized.

thedak

06-29-2009, 05:55 AM

Toyo 285 is about 12mm wider than a 275.

I have measured them beside each other.

jittrbugg

06-29-2009, 06:29 AM

Looks good. I hope everything works out when you drop it back down. Nice to see the wheels clean again! :)

Melissa

ddawson

06-29-2009, 10:03 AM

On my 19x10 I've had no issues with the control arm.

Only the Shock and the Fender lip. On the drivers side plastic liner that has been some contact, but nothing big.

Once I removed the lip, made some room in the fender well and removed the shocks dust cover I get no contact at all. Even with a full load and 45 degree driveways I get nothing. BTW I'm using the Nitto Invo.

NA$TY-TA

06-30-2009, 01:05 AM

Purple can you measure how wide your 285's are?? Im wanting to compare them to my Continintial 275's.

Maybe ill go with the Toyo's next.... unsure

NA$TY-TA

06-30-2009, 01:12 AM

Found it.... as per Toyo's site it says there 275/30/19 is a 10.6" wide tire and most others are 10.9" wide.

Toyo says there 285/30/19 is 11.2" wide...

Kyle

purplenurple

07-08-2009, 05:02 PM

Just a little update - I still have the bags at 15psi, but the driver's side rubs a teeny weeny bit on corners. Its just enough to annoy me. No cutting or the tire just a slightly visible rub mark on it and on the tap that I've on the lips. The other side doesn't seem to touch.

My cradle is probably off, and the stock rubber bushing back there don't help I'm sure. I am not sure how much compression there is with the bag on corners, but when I get some time Ill do some metal removal with a hand file to see how it goes.

They also seem to grip pretty nice. I still chirp 1st, 2nd, and third, but before I used to spin pretty bad on the 1-2 shift.

thedak

07-08-2009, 05:09 PM

Ill do some metal removal with a hand file to see how it goes.

Hand file ? LOL

Come on Purple...

You are going to need a grinder with a nice

wheel on it to actuallly remove some material.

Get rid of those horrible bags.

You got nice wheels do them some justice.

1. Pedders 1/2" Drop Rears
2. Pedders Big Bores
3. Grind Lips
4. Rear Cradle Bushings
5. Cradle Alignment

purplenurple

07-10-2009, 01:05 PM

I'm waiting on the BC Racing coilovers

... or maybe a C63

04progoat

07-10-2009, 03:40 PM

Ive been running nittos 285s for awhile now on 18" tsw thruxtons. I like the tires but been if your rear end is stock it will break really easily happened twice befor i droped the big money and saind enogh is enoght. So now im switching it up a little bit and going with bfg's g-force t/a drag radial 295s theyll be in next week!!! No modifications yet to fit the bigger tires well c what happens?

thedak

07-10-2009, 05:20 PM

I'm waiting on the BC Racing coilovers

... or maybe a C63

word

Goat Feva

07-23-2009, 10:07 PM

I'm looking to buy two 19X9.5 ROH Drift-R to replace the 18X8's that is currently on the rear. Where is the best place to purchase them and what should I anticipate spending per wheel? (Quoted $650 per wheel at Wayne's wheel)

Also what offset should I get to run 285's. Willing to get the fenders rolled and Peddders no drop springs!

Thanks in advance for your help,
Goat Feva

zech912

07-24-2009, 02:56 AM

If you are going to attempt 285s, why are you not going for a 10 inch wheel? It is not that 285 will not fit on 9.5, 9.5 is just barely wide enough for it, it is that you are going to need all that space anyway for the tire, it seems you would want to go ahead and get the 10 inch wheel. Is that wheel not available 10"? Also, I think you may want to be thinking of Pedders drag springs or Kings HD springs. I have the 0" Pedders and I scrape sometimes with 275s, but fenders are not cut or rolled.

cisco

07-24-2009, 05:18 AM