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Old 06-12-2003, 01:24 AM   #51
Kean
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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
What wheel width are we talking about? I have 17x8's @ 40 and 225/45/17's that fit right to the edge of the wheel wells. Depending on the tire, I could possibly rub in the rear if I lowered the my car.

Quote:
Originally posted by maxxdotcom
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
I beleive +40 would be too litttle of an offset for a 7" wheel. My 8" wheels should be o.k. according to Brian's post (I PM'd him to verify). Given time and after re-reading the entire thread, it made more sense. He specifically states "Offset Nirvana is within a few millimeters of:"

Width .... Offset

6.5" ....... +53 to +55
7.0" ....... +50 to +53
7.5" ....... +47 to +50
8.0" ....... +43 to +47

I take this to mean that as long as your a few millimeters close to these ranges, you should be fine.

Kean
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Old 06-13-2003, 08:41 PM   #52
ImportVenom
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Default What about 17x7 with +42 offset?

Hey all, what do you think about 17x7 rims with +42 offset on 215/45/17 tires?

A local shop and Wheel Max both said it would be fine on the sedan WRX. But it seems to not agree with what you guys are saying, since it should be +50 to +53? I'm at stock height.

Also, is wearing out the wheel bearings the only real negative effect of using too low of an offset? How much does it cost to replace (parts & labor)? I might be willing to take that risk.
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Old 06-13-2003, 10:34 PM   #53
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Ok people..for those that dont understand...

Quote:
few ( P ) Pronunciation Key (fy)
adj. few·er, few·est
Amounting to or consisting of a small number: one of my few bad habits.
Being more than one but indefinitely small in number: bowled a few strings.



"few", "Sighting Distance" = 1 or 2 millimeters

Width .... Offset (+/- 2mm)

6.5" ....... +53 to +55
7.0" ....... +50 to +53
7.5" ....... +47 to +50
8.0" ....... +43 to +47


I understand..and Im stupid. Whats your problem??
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Old 06-20-2003, 05:20 PM   #54
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Default I learned my lesson

I had 17 X 7 offset of 40 for about 6 months.

The wheel bearing is now noisy. Went to Subaru yesterday and complained about the wheel bearing since it is under warranty.

They couldn't find any problem. Installed stock wheels on it and noise is gone. Ended up have to pay them for the service.

Talked to the shop where I got my wheels. Good thing that they are willing to replace it for free. This time it will be 17 x 7 offset 52.

I believe my wheel bearings are marginally damaged now. That it is noisy with extra load due to the wrong offset.

Just sharing my experience; since I failed to do my research beforehand.
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Old 07-01-2003, 02:33 AM   #55
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I interested on some volks racing rims, but I was wondering if I getting a 18X8 which offset should I use? +48 or +44? I know alot of memeber here with STI have problem of clearance of the brakes. Which offset will be the best?
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Old 07-01-2003, 11:10 AM   #56
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Default 5Zigen Super Six

as a follow-up: I went with 5Zigen Super Six in 17" with et48. I suppose this falls into the 'few' catagory that is so widely misunderstood. Have I reached "offset nivana"?

Paired with Hankook Ventus K104 215/45 - 17's.

Everyone loves the rims and I get a lot of thumbs up from people (friends / coworkers) telling me that they look cool in motion. I've yet to see that for myself though....

Maxx
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Old 07-02-2003, 07:15 PM   #57
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Default Technomagnesio Detroit wheels 35 offset

It sounds like these won't work, Is this true even though they are 8.5 inches wide??? Please let me know. I've seen these on WRX and I really want them. Discount tire lists them as being able to work on subarus...

PJ

Thanks
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Old 07-04-2003, 05:17 AM   #58
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There's an excellent discussion of offset related to bearing wear and suspension / fender clearance in the "WHEEL OFFSET ? Consider This ! " thread.

Extrapolating from the infomation in that thread and this one it should be pretty clear why it's nearly impossible to answer those "can I use this wheel with a 42 offset..." questions - unless someone else has already used a wheel of the same size and offset - with the same tire, on the same body style, using the same suspension components - AND thoroughly checked clearance at the extremes of suspension and steering travel. (I check the travel extremes via RallyCross )
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Old 07-25-2003, 06:05 PM   #59
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Default rubbin

Width .... Offset

6.5" ....... +53 to +55
7.0" ....... +50 to +53
7.5" ....... +47 to +50
8.0" ....... +43 to +47

ok... I bought some Rota subzeros, 17x7.5 48mm offset... They rub. I'm annoyed. The tires I put on there are to the best of my knowledge the right tires for the job, and by that I mean that the intention was to keep the overall diameter of the tire the same (such that one wouldn't have to putz with the speedometer or worry about the wheels rubbing-whoops!). So... I'm wondering if I should just say screw it and try to cut off some of the plastic protector on the inside of the fender or just deal with it. I can feel the plastic starting to wear so I know that's what it is. It doesn't really happen as much unless there are people in the car. I would imagine that means that lowering the car would be a bad idea... I suppose I could install some sort of bump stop... Any suggestions?
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Old 07-25-2003, 06:53 PM   #60
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Default Re: rubbin

Quote:
Originally posted by variable
Width .... Offset

6.5" ....... +53 to +55
7.0" ....... +50 to +53
7.5" ....... +47 to +50
8.0" ....... +43 to +47

ok... I bought some Rota subzeros, 17x7.5 48mm offset... They rub. I'm annoyed. The tires I put on there are to the best of my knowledge the right tires for the job, and by that I mean that the intention was to keep the overall diameter of the tire the same (such that one wouldn't have to putz with the speedometer or worry about the wheels rubbing-whoops!). So... I'm wondering if I should just say screw it and try to cut off some of the plastic protector on the inside of the fender or just deal with it. I can feel the plastic starting to wear so I know that's what it is. It doesn't really happen as much unless there are people in the car. I would imagine that means that lowering the car would be a bad idea... I suppose I could install some sort of bump stop... Any suggestions?
It rubs on stock height? What size tires do you have? I don't think with that offset you should be rubbing if your car is stock height.
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Old 07-25-2003, 08:53 PM   #61
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okay, so you don't think they should rub... but the man says they rub. what can we do to help?

Q: what tires?
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Old 08-05-2003, 11:56 AM   #62
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Default Wide Look - No Rub

I like the way this car looks. I have an '02 Wagon and want this look, but don't want it to rub. Everything is stock. What wheel size, offset, tire size, should I get?

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Old 08-06-2003, 05:40 AM   #63
Mark Avery
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>I have an '02 Wagon and want this look, but don't want
>it to rub. Everything is stock. What wheel size, offset, tire
>size, should I get?

17 x 7.5 rims, 48 offset, 215/45-17 tires, and your car needs to be lowered about 1.5 inches.
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Old 08-06-2003, 11:51 AM   #64
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Those sure look like 18 inche wheels to me. What offset would I want if I got 18's?
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Old 08-19-2003, 11:41 PM   #65
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I've read through this FAQ thread but I'm still a little unsure. I thought I'd pose my question and see what other members thought. I'm currently looking at some rims from Arospeed and ICON (RSGT and the W65, both in gun metal) that are 18x7.5" with a +45mm offset. According to the chart at the beginning of the thread, that's 2mm under the safe zone. What do you guys think? Do you think this will cause any or even serious bearing wear? My 2003 WRX sedan currently has no modifications at all, 100% stock right now. Thanks for any insights and information.
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Old 09-07-2003, 07:25 AM   #66
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After reading all the post I could on this offset/wheel width debate I decided to make a pictorial comparison of the different offsets+wheel width+wheel dia+ tire width+ tire sidewall using autocad

For my example my stock 205/55-16's on 16x6.5 55mm offset rubbed the inside of my wheel well with my current suspension (Cusco Zero2) on hard cornering, yes my WRX is lowered, so I trimmed some of my wheel well. I didn't want to trim any more so....

With Autocad I can take each wheel tire combo (view is a section as if looking at front of car) overlay one combo onto the stock and see if it will rub or not

I know this is only one of the aspects of picking a proper fit but it at least narrowed my choices

I can't post the files on the web because I have no page
I am willing to e-mail the Autocad .DWG and .xls file to anyone but
I ask that the person check my calcs on the Excel file and
This was meant for myself but I want to share if it helps others so please no flamers

you will need autocad and Excel to view the files

PM me if youy want me to send

Thank you
WR-Xtasy
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Old 09-14-2003, 12:16 PM   #67
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Default 18x8.5

I want to run 18x8.5 with 235/40s on my 03 WRX with Cusco Zero2 coilovers, would 45 offset fit, that is what people from rim places have said and that is basically what I have come up with in the math department.

Could someone help me out?
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Old 09-16-2003, 03:33 PM   #68
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Default Enkei Rims 17x7

My Enkei rims are 17x7 with a 38 offset. I used these on my 01 RS and they rubbed a little with 205 45 17 tires on them. Never rolled the fenders and it caused my trunk to leak, I fixed it though. Now I have these rims on my 04 WRX, I rolled the rear fenders and have no problem anymore. Yes I am partly a cheap bastard because I did not but new rims but I am a poor bastard so there. I have no problem in the front. I will be lowering the car in a couple of weeks and then we will see if I have a problem.
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Old 09-17-2003, 04:26 PM   #69
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This is alot of useful info for late model Subarus. That's all well and good, but what about those of us with earlier model Subarus? I was wondering if anyone could tell me what to look for in the way of offset for my wagon, or a similar year sedan. Anyone had any experience?

I am fairly recently in the market for a new set of wheels, and was considering a set of 2003 WRX wheels. Would this have any major offset problems? I know they fit in the wheel wells alright, and don't have any major rubbing issues, is there anything else I should look out for? Any answers would be greatly appreciated.
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Old 09-22-2003, 10:25 PM   #70
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Here is the formula to determine the wheel location in the wheel well: WIDTH-((0.5*WIDTH)+(OFFSET/25.4)) The width is in inches and the offset is in millimeters.

This will tell you how far the outside wheel lip is from the hub mounting face. For instance, the outside lip of the STi stock wheel (7.5" width, 53 mm offset) is located 1.66 inches from the hub face.

To avoid having the wheel stick out any further, an 8" wide wheel needs to have an offset of 59 mm.

Or, a 7.5" wide wheel with a 42 mm offset will stick out 2.1 inches which is .43 inches further than the stock wheel.

I hope that this makes sense and is useful.
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Old 09-23-2003, 03:07 PM   #71
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Quote:
Originally posted by Rickard
To avoid having the wheel stick out any further, an 8" wide wheel needs to have an offset of 59 mm.
I disagree with this. Why? If you add 1/2" to the wheel, and you keep the outer edge the same as the 7.5", the newly added 1/2" will be forced to the INSIDE of the wheel well and will be nicely pressed up against the Strut Coil, once a beefier tire is mounted to the wheel.

When plus sizing, you have to comprimise.

Example.. going from a 7" wheel to an 8" wheel... You have your centerline (optimal point where the manufactuer wants the wheel to be). If the car comes from the factory with a 7" wheel, and you increase it to 8", you need to make sure the centerline stays, in the center. How does that happen? A quick look at things says, 1/2" to the inside of the centerline, and 1/2" to the outside of the centerline. IN order to do that, your offset must DECREASE. (remember, we have a POSITIVE offset of 53 or some such number) Increasing your offset will make it go into the 40's, then 30's, etc... until it reaches Zero.

You might want to take another look at your approach to using a matematical equasion to have it compensate for the negative so your 8" wheel, using the math goes the opposite direction instead of from -53 to -59 (-6mm), it goes from -53 to -47 (+6mm)... which is near/at the suggested offset on the first page of this thread.

It's the tires mounted on your rims causing rubbing issues. All tires, as stated earlers, even though marked with the same number, come in all different actual widths.

Example: 225 Azenis vs 225 Dunlops. The Azenis is still wider.

You're close tho!

Last edited by KC; 09-24-2003 at 08:40 AM.
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Old 09-23-2003, 03:49 PM   #72
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I stand by my equation. I'm not saying an 8" rim will fit - I'm just telling you how to determine what the difference will be.

An eight inch wide wheel with a 59 mm offset will have the outside of the wheel in the same location as the stock STi wheel. It may rub on the inside but the outside will be at the same location as the stock wheel. That's all that I'm saying.

I make no representations about what fits or what doesn't fit.

Thank you for your comments, though.
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Old 09-23-2003, 04:04 PM   #73
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Great... how does what you're saying help a person looking to go up to an 8" wheel for their STi? Or WRX for that matter?

Let's take you out of the labratory and away from the math and put you in front of your car with a 7.5" wheel on your car and a catalog of 8" wheels that you want to upgrade to (real world).

Which one are you going to select? The ones that are listed on the front page of this thread known to work, or are you going to do the math and pick a 59 offset wheel... ***IF*** you could even find any high that are not custom made.

Your math, your comments, your statements have no bearing in this real world on getting an 8" wheel to work on an STi --- period.

Not only that, the offset you say would push the wheel too far in from centerline/optimum that it would have just as bad an expereince with the wheel bearings and premature wheel bearing falure IF you could get the wheel to not rub on the struts as if you went too far the other way!

So, real world here...

Your math has no bearing on selecting the proper wheels for an STi, does it?

--KC
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Old 09-23-2003, 09:54 PM   #74
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I am sorry, but I just cannot make it any simpler for you.
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Old 09-23-2003, 11:51 PM   #75
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This is an impressive dialogue....IF you have a few thousand dollars to spend on an exotic wheel/tire packge.

Can anyone help answer my easy question?
I want to upgrade the whhels/tires on my '01 forester L (15" steelies with 205/70 15's) to newer 16" Subaru alloys possibly from a wrx....Which wheels will fit while keeping the proper offset?

Thank you for helping this simpleton!!
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