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Old 07-09-2001, 08:19 PM   #1
Chris02WRX
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Question Local dealerships WRX wheel/tire/spring combo. I have a question.

I was at my local Subaru dealership earlier today ,getting my oil changed, and noticed that they had modified one of their own WRX's.

What I found interesting is that they had a set of 17x7 Enkie CDR9 (+40 offset) wheels with 215/45/17 tires. It was also lowered with H&R springs.

I had emailed Enkie months ago asking what they offered to fit the WRX with it's 5x100 bolt pattern and they said the highest offset available was +40.

Everything I've read on this site says they won't work and they'll rub.

I asked the Service Manager if they rubbed and he said no. I checked the inner fenders, etc. for rub marks and their wasn't any.

I've been looking for a wheel/tire combo for a couple of months now that I like but have been seriously hindered by the supposed offset problem.

So whats the deal? Has anybody else run this offset on a WRX with success?

Thanks!

Chris
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Old 07-10-2001, 07:05 AM   #2
Chris02WRX
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ttt
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Old 07-10-2001, 01:14 PM   #3
Chris02WRX
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100 views and nobody can help me out?
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Old 07-10-2001, 01:40 PM   #4
Zahnster
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The sedan is alot more forgiving than the wagon in terms of rubbing.(Low offset leads to rubbing on inside fender wall or if it's low enough the fender itself if there is enough weight in the trunk).

Imprezer himself is running +38 offset on his WRX sedan, but this is under special circumstances(clears his (unusual?) big brake kit) and he has said himself he would rather be running +48 offset.

The low offset will widen the track of the vehicle even more and would probably put extra strain on the wheels bearings. The Ideal offsets really should be attempted. The problem is you've got to stop looking where you would for just about any other car. Japanese websites or wheel makers are a great place to find Suby friendly offsets.
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Old 07-10-2001, 01:41 PM   #5
rkkwan
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It's because the subject of off-sets have been talked to death.

The WRX has a lot more fender room than the RS, so you probably won't see tire rub, but that doesn't mean it's okay. You're pushing the tires 15mm outwards, and that will totally change the geometry of the suspension. The parts won't fail right away, but I doubt it'll even handle correctly in that form.

-Ray
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Old 07-10-2001, 01:59 PM   #6
Chris02WRX
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Quote:
Originally posted by rkkwan
It's because the subject of off-sets have been talked to death.
That's exactly why I posted.

The last few months I've read nothing but conflicting posts on what works and what doesnt concerning wheel offsets. I've read MANY posts saying an offset such as +40 won't work, no way, no how.

Then I see a car running an offset, that conflicts what I've read on this site, with my own eyes and it makes me wonder if people are actually experimenting with different offsets or posting from hearsay.

Forgive me, but I'm new the Subaru world. It's been discourging trying to find the correct offset wheel when the 5x100 bolt pattern is so common.

I'm used to the Mustang world where I can find just about any aftermarket part anywhere.

Thanks for the responses.

Chris
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Old 07-10-2001, 05:33 PM   #7
Scooby do
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Did you go to Go on 28th Street in GR? I looked at that WRX also. It might not rub but 40mm is way off from what I have read about Subaru's. www.spdusa.com has an article about wheel offsets and how they change handling, even though that is written about the old generation RS the same offsets are required on the WRX. I have 17" 50mm offset ADR's on my car. I wouldn't go below 48mm. But then again I am no expert.

Bob
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Old 07-10-2001, 06:12 PM   #8
Chris02WRX
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Quote:
Originally posted by Scooby do
Did you go to Go on 28th Street in GR? I looked at that WRX also.
Yeah, its Go Dealerships white WRX.

Where did you buy your ADR wheels? And do you know if they offer anything in 18" with +50 offset?

BTW, I have the silver sedan with tinted windows and a wing if you see it around town.

Chris
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Old 07-10-2001, 11:01 PM   #9
Scooby do
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Chris,
I bought my rims and tires from www.trituning.com . He has a set for sell in 18" with tires in the private classifieds, not sure of the offset. They are good guys to deal with they sell Suby stuff only so I am sure they would be the right offset. Anything else just email me.
See ya
Bob


For sale:

18" Advanti Racing Phase I Wheels. Silver with a machined lip. All 3 center cap option colors included (blue, red, silver). Locking lugs also included. Wheels are sitting on Kuhmo 712 tires sized 225/40/18. Wheels and tires have between 1,000 and 2,000 miles on them. In beutiful condition.

Price reduced from $1500 to $1200. Need to sell immediately.

Chris
TRiTuning
610-759-7000
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Old 07-11-2001, 09:23 AM   #10
ScoobyDriver
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Quote:
For each wheel these would be the ideal specs :

15x7" w/ +53mm offset

16x7" w/ +53mm offset

17x7" w/ +53mm offset

15x7.5" w/ +50mm offset

16x7.5" w/ +50mm offset

17x7.5" w/ +50mm offset

18x7.5" w/ +50mm offset

18x8" w/ +48mm offset (maybe down to +46mm)
Shane Kullman
'02 WRX Blue
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Old 07-12-2001, 01:55 AM   #11
subysouth
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Default Ithink gtbguys offsets are a little high.....

The wrx and rs (2002) apparantly come with a 55mm offset based upon a 6.5 inch wheel. That comes to a stock wheel depth of approximately 139.5 mm from the mounting surface back. so to maintain the same DEPTH for each of the following wheel widths you would need these offsets:

7" 139.5 - (3.5 x 26mm) = 48.5mm offset

7.5" 139.5 - (3.75 x 26mm) = 42mm offset

8" 139.5 - (4 x 26mm) = 35.5mm offset

now obviously there is some room to play with to the inside but these are the numbers that would maintain the stock depth. I know that wheel lip rubbing would be an issue on the 8" at least but the 7 and 7.5 I've heard are fine. You see people posting about not changing stock offsets, but the offsets around 53mm on a 7" are off stock. IMHO, the numbers above center the mass of the wheel at the same position relative to the hub. Imprezer is running a 38mm offset with an 8" and a lot of people were suprised but this is about right. Of course to accomodate the 8s he had to roll the fenders. But I have not heard of anyone running eights without an offset of 38-40mm. My .02.
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Old 07-12-2001, 02:57 AM   #12
Gary (gg)
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Okay, this WRX with the 40mm offset is sitting at a dealership. Has it been driven hard? Just sitting there the 40mm will work but actually driven is an another story and probably another offset.
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Old 07-12-2001, 07:01 AM   #13
Chris02WRX
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Quote:
Originally posted by Gary (gg)
Okay, this WRX with the 40mm offset is sitting at a dealership. Has it been driven hard?
I cant say it's been driven hard, because honestly I don't know. But they (dealership employees) do drive it and you know how most salesmen, mechanics, etc. at dealerships drive cars. Pretty damn hard!

I talked to the sales manager, the mechanic that installed the mods, and the guy that happened to be driving it at the time I was at the dealership and they all said no rubbing.

Chris
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Old 07-12-2001, 08:51 AM   #14
MY99 2.5GT
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Everyone just be quiet and Calm. The chart that is listed a few posts above is almost correct.

My guidline is to go by what Prodrive uses. With the 18X7.5 P1 they use a +53 offset. Period. For any 7.5" wheel optimal offset if +53. Don't mess with anything else because although it may not rub you will see the !expensive! effects in the long term. Tire width are just as important as wheel specs. I would try and stay under an 8.5" section width and stay as close to stock diameter as possible. Stock tread width is something like 6.4" wide. I wouldn't go over 7.4" wide.

With a 7" wide wheel I would stay with +50 or above and go with a 205 50 17 or 205 45 17. Tire width guidlines are the same as the 7.5" wheel.

Thanks
Brad
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Old 07-12-2001, 05:27 PM   #15
subysouth
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Cool I wonder....

MY992.5GT I was not trying to rock the establishment. I was only trying to state that as long as internal depth was maintained I seriously doubt any long term damage would occur to the bearings axles etc. You have not given the wheel any significant leverage advantage against the hub as long as full stock internal depth is maintained. So I guess what I should have said is that a range from GTBguys numbers to mine should be safe as long as wheel rub is not encountered (his and your numbers increase tire depth into the wheel well.) It is when the inside tire/rim surface is displaced outward that the tire/wheel places undo strain on the hubs. Witness Hondas with wheels outside the fenders making monthly trips to Autozone for new bearings. All of this is IMHO, I am not a wheel expert but I did minor in physics.
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Old 07-12-2001, 05:30 PM   #16
subysouth
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I couldn't agree more with your statements on tread and section widthand tire height. These are more often the cause of rubbing than rim offset.
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