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Old 03-27-2003, 11:08 PM   #26
G-force
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Default Re: Re: The Offset Information Thread

Quote:
Originally posted by North Ursalia
As I stated in the post that started this thread, and in my last reply up above:




I don't mean to pick on you specifically, I just wish people would read threads completely before replying . I've been guilty of it myself too- things go alot more smoothly when information doesn't have to be repeated .


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I did completely read the thread. I'm just asking what's your definition of "sighting distance"? Evidently, cereal doesn't understand "sighting distance" as well. And I didn't mean to pick on cereal specifically. He just happened to be a good example.

cereal - a +45mm offset should be fine on a sedan, pushing it on a wagon. Also what zahnster stated, type of tire used, even in the same size for all brands, will vary among manufacturers. Example: Azenis Sports are generally wider than the same size from another tire co.
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Old 03-27-2003, 11:53 PM   #27
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thanks G-force, but i was not really worried about rubbing, i am worried about long term problems that may come up with my wheel bearings. However giving the way you answered the question, it seems like i souldnt have a problem in that area either. would i have any wheel bearing problems down the road?
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Old 03-28-2003, 01:48 AM   #28
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If we wanted to use 285's on our cars (like the Cobb Tuning WRX), then the offset would be around +35?
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Old 03-28-2003, 12:14 PM   #29
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How about 18x8 +42? It's so close! Where would this cause problems on an 02 WRX? Very helpful thread!
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Old 03-28-2003, 01:23 PM   #30
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"How about 18x8 +42? It's so close! Where would this cause problems on an 02 WRX? Very helpful thread!"

It will put uneven load on your hubs and bearings (and will probably rub on the fenders).

-Josh
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Old 03-29-2003, 12:55 PM   #31
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Quote:
Originally posted by Kean


I'm still interested to see a response to BOFslime's post. Not only is OZ's info contradictory to the FAQ above, but it seems the offset goes in the opposite direction according to OZ (17x7 offset 48 and 18x8 offset 51). .....vs.:

7.0" ....... +50 to +53
8.0" ....... +43 to +47

I'm confused. Does Subaru provide this info or are there other sources to compare to?

Regards,
Kean
I was starting to become worried that no one noticed this but me, and everyone seemed to just gloss over my post. I spoke with Bernie@tirerack he said that +48 was a good offset (actually I think he said, 'that’s the good offset'). Since North Ursalia's figures say +50-53 is nirvana, and OZ seems to completely contradict it progressing though width sizes. I think +48 is a very happy medium. looking forward to the arrival of my wheels.. Should be here sometime after the 15th (s03's are backordered).
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Old 03-31-2003, 01:43 AM   #32
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arent my factory 16" rims MYO1 RS 16x7 at 48ET?
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Old 03-31-2003, 04:22 PM   #33
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FWIIW...

From www.prodrive-usa.com

P1 Wheels...
Manufactured for Prodrive by O.Z. Racing in Italy
Available sizes: 17” X 7.0” or 18” X 7.5”
Colors: Anthracite, Gold, Silver
Fitment Specs: Bolt Pattern: 5 X 100mm
Center Bore: 64mm
Offset: 17” X 7.0” +52mm
18” X 7.5” +53mm
Fits most Subaru vehicles....

PFF-7...
Manufactured for Prodrive by Speedline in Italy, utilizing a new flowforming process
Available sizes: 18” X 8.0”
Colors: British Bronze, British Pewter, Bright Flitter, Gold
Fitment Specs: Bolt Pattern: 5 X 100mm
Center Bore: 64mm
Offset: +51mm
Fits WRX and ’02 and up Impreza


P7...
Manufactured for Prodrive by Speedline in Italy
Available sizes: 17” X 7.0”
Colors: Anthracite, Gold, Silver
Fitment Specs: Bolt Pattern: 5 X 100mm
Center Bore: 64mm
Offset: +52mm
Fits most Subaru vehicles



YMMV....
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Old 04-01-2003, 01:47 AM   #34
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Quote:
Originally posted by akcel
arent my factory 16" rims MYO1 RS 16x7 at 48ET?
OE Subaru 16x7s are ET53.

I would like to add that the listed offsets don't apply neatly to Foresters since they require a slightly lower offset from what I've seen in the Forester forum. The OE 16x6.5 are ET48 IIRC. There have been instances of P7s (17x7 ET48) not fitting.

AG
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Old 04-02-2003, 01:12 AM   #35
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dead eye

1st of all you need 10" wide rims
yeah i think that offset would be apropriate maybe even +28-30

but your biggest hurdle is huge fender flares

take a close look at conebasher and youll see what i mean

mike
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Old 04-07-2003, 07:52 PM   #36
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Quote:
Originally posted by BOFslime


I was starting to become worried that no one noticed this but me, and everyone seemed to just gloss over my post. I spoke with Bernie@tirerack he said that +48 was a good offset (actually I think he said, 'that’s the good offset'). Since North Ursalia's figures say +50-53 is nirvana, and OZ seems to completely contradict it progressing though width sizes. I think +48 is a very happy medium. looking forward to the arrival of my wheels.. Should be here sometime after the 15th (s03's are backordered).
OZ Superleggeras were not made specifically for Subarus.

FWIW:

Subaru MY02 Impreza WRX 16x6.5 +55
BBS Subaru Impreza WRX 17x7 +53
O.Z. Prodrive P1 17x7 +52
Subaru 17" 5-spoke 17x7 +53
O.Z. Superleggerra 17x7 +48


That said, I run 7" +48 and I've heard it's the best setup for performance from a few sources. That doesn't mean it's the best for your wheel bearings!
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Old 04-27-2003, 09:50 PM   #37
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alright i cant make sense of any of this.. all i want is a YES Or NO answer. and no smart comments about how i shoulda read this or that. Will Motegi MR7 18x7.5 with an offset of +45mm do damage to my99 2.5RS GC8 now i know that it will fit and i know that youve all said what fits is not neccisarily what is right for the car.. so just tell me if its going to be majorly haphazard to my GC8 or if i can get away with running them.. thanks. Paul
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Old 04-30-2003, 05:21 PM   #38
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How about 18*7.5 ET 50?
Thanks
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Old 05-20-2003, 08:37 AM   #39
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Heres one I've never seen before...

How about 18 x 7.25" 56mm?

described as "High Offset for Subaru vehicles"

--
Cheese
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Old 05-20-2003, 02:10 PM   #40
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Quote:
Originally posted by PumpsGOTAWD
alright i cant make sense of any of this.. all i want is a YES Or NO answer. and no smart comments about how i shoulda read this or that. Will Motegi MR7 18x7.5 with an offset of +45mm do damage to my99 2.5RS GC8 now i know that it will fit and i know that youve all said what fits is not neccisarily what is right for the car.. so just tell me if its going to be majorly haphazard to my GC8 or if i can get away with running them.. thanks. Paul
YES!! too low of an offset for a gc8. unless shaving/rolling of the rear fender or extreme negative camber is used.

calworld - yes, that would perfectly fit - but don't forget about tire sizes as well especially if you have a wagon or a gc8. I have those exact specs on my Volk Racing GT-C's. I've got a WRX sedan btw.

Macncheese - what wheels are those?
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Old 05-20-2003, 03:26 PM   #41
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Quote:
Originally posted by G-force


Macncheese - what wheels are those?
First tell me if they're good for a lowered WRX wagon.
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Old 05-22-2003, 06:45 PM   #42
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Will an ADR wheel 17X7.0 with a +43 be ok, just barely? Thanks!
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Old 05-26-2003, 12:43 AM   #43
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I haven't ever seen any threads on wheel bearing failures, but it does make sense that numerically small offsets would increase bearing problems over time. Cornering hard should also be avoided...hahaha.

moving on...

I'm not a suspension guru, but I think something is being overlooked. I think you'd call it torque steer, but I'm not sure if that is the *real* name.

Let's assume that a USDM WRX sedan can fit 245's all around with ZERO offset for a moment. I know this is fantasyland, but bear with me.

In the front, stepping on the gas will toe the wheels inward. It will also lift them up slightly, depending on caster. They will also creep forward of their normal location. Slamming on the brakes will toe the wheels out greatly. Since the WRX tends to dive, the toe out will be extreme.

The extra offset will give the tire more leverage to move around in the bushings. It will also give the tire more leverage to steer. If you press on the gas pedal when exiting a corner, the outside front tire will steer INTO the curve. Since the car is leaning during a corner, the tire will climb forward and UP! This is extra understeer that an AWD doesn't need.

Like I said, I'm no expert (I probably got parts wrong), but my point is that all kinds of wacky suspension gremlins are waiting to pounce on "wider is more gooder" guys.
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Old 05-26-2003, 01:40 AM   #44
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do you think it will be okay if i buy 40 offset rims and 225/45/17 tires on the stock height?
is there any problems if i lowered the car
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Old 06-02-2003, 05:23 PM   #45
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Quote:
Originally posted by chobits
do you think it will be okay if i buy 40 offset rims and 225/45/17 tires on the stock height?
is there any problems if i lowered the car
I'd like to hear the answer on this one too.

"some place" is telling me that a Motegi MR7 in 17x7 +40 will be okay for my car. Her distributor says that it should be okay, but I don't think it will be okay, and told her to hold off on ordering those until I can get a clear answer from someone, yay or nay.

I don't plan on buying tires from them. The woman behind the counter seems to think that the rims can be mounted on the hub without a tire and we'd be able to tell if there will be rubbing issues.

I'm not real confident in her at this point, and 'guessing' isn't the right answer for me.

I'm riding on Eibach Pro-Kit springs, btw.

Maxx
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Old 06-03-2003, 01:36 PM   #46
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Did you guys totally misread the first post? Nowhere in that post did it mention +40mm offset as being acceptable.
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Old 06-03-2003, 02:09 PM   #47
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yes, I read it... and that's what I was arguing with this woman about. She was convinced that a 17x7 +40 would fit, and I was trying to tell her that it wouldn't.

So she was telling me that I was wrong, and I guess I had to come here to get that 2nd opinion (again).


-Maxx
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Old 06-08-2003, 02:49 PM   #48
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Quote:
Originally posted by Kean
I'm still interested to see a response to BOFslime's post. Not only is OZ's info contradictory to the FAQ above, but it seems the offset goes in the opposite direction according to OZ (17x7 offset 48 and 18x8 offset 51). .....vs.:

7.0" ....... +50 to +53
8.0" ....... +43 to +47

I'm confused. Does Subaru provide this info or are there other sources to compare to?

You are right, and the original poster is wrong: the wider the wheel, the less positive offset required to stay within manufacturer's track.

FYI

Last edited by FYI; 06-10-2003 at 08:48 PM.
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Old 06-10-2003, 02:09 PM   #49
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OK, How does the Jun Hyper Lemon WRX fit 18x9.5 Advan RG rims with 265/35R18's in the fenders? I don't know the offset sorry. I'm not sayin I want to put something this huge on my car, but it only has a 2 inch drop (my car) and I would love some 18x8's with a nice lip, so around a 40 offset>? Thanks guys, this is a very helpfull thread by the way.
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Old 06-11-2003, 07:53 PM   #50
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Default Short answer: IT'S A FRICKIN' JUN!!!

Long answer: It uses every trick in the book and a few that aren't. The Jun car is converted to 5x114.3mm bolt spacing (front only, I think). I haven't looked at it in a while, but I'm sure that the fenders have been changed, rolled, massaged or altered. Different wheels and tires can be used front or rear, as long as the diameter remains close to the same. I'm sure that the coilovers and camber plates are designed to fit a wider tire. Another possible way to make room would be with wagon L arms. Jun could have even moved the supsension pickups a centimeter or two. They have that technology.

Another trick I've been thinking about would be a spacer between the bottom strut bolts and the rest of the suspension. It could space the strut inboard and upward at the same time. Coilovers can also be made to mount on top of the strut towers. Strut towers can also be welded so that they are taller. That moves the strut upward so that the skinny part of the strut is next to the sidewall of the tire. Moving them inboard too much would prolly screw up the steering, I think.
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