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Old 04-25-2001, 09:35 PM   #1
Scooby Specialist
Member#: 2649
Join Date: Oct 2000
Location: Sebastopol (Graton), CA
00 2.5RS-t cpe BRP
64 chevelle SS

Post What is the ideal offset for 18x7.5 wheels?

I have posted that my 17s might be recalled and I can order a set of 18x7.5 for more and I can get a custom offset. What is perfect without rubbing etc.

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Old 04-26-2001, 11:16 PM   #2
ImprezaRS dot com
over boosted again
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Join Date: May 2000
Chapter/Region: RMIC
Location: Colorado Springs CO USA
2017 WRX Limited
2015 Forester XT, Tribeca


If you are the guy with the WORK wheels, I still recommend contacting Gunner Heugberger at 719-475-1920 or www.heubergermotors.com since he put those wheels on his RS already.

Larry www.ImprezaRS.com
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Old 04-27-2001, 06:53 AM   #3
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Location: Coram LI NY
2001 2.5 RS


Why will not yuou guys get it?

Offset has NOTHING to do with wheel diameter (Unless some very VERY specific cases. But I bet it aint one of them).

10" rim and 21"rim for same car should carry same offset! PERIOD! No more discussion about this please!

Go to my site http://25psi.topcities.com
and read an articale about wheel sizes.

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Old 04-27-2001, 06:57 AM   #4
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it doesnt have anything to do with diamater, but it does have to do with width. what is the stock RS's width? 6 in? im assuming he has 7 in wide rims now since hes rolling on 17s, and now hes going up to a 7.5 in width. surely the ideal offset would change somewhat..
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Old 04-27-2001, 07:24 AM   #5
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2001 F250 7.3L TD
2011 STi


The stock RS wheels are 16x7 ET53. So anything with a width of 7" would have an ideal offset of 53mm however I feel anything between 50-55mm is fine for a 7" wide wheel.
For a 7.5" wide wheel I would suggest somewhere along the lines of 48-50mm.

Here are a few pics of my car with 17x7"ET50 ADR wheels and 215/45R17 Yokohama AVS Sport tires. I also have stock struts and spring so the ride height has not been changed from stock. I have not had any rubbing issues even with about 70 lbs of stereo stuff in the trunk and 5 adult passengers in the car.

front wheel and tire
<IMG SRC="http://albums.photopoint.com/j/View?u=1654202&a=12666180&p=47327176&Sequence=0" border=0>

rear wheel and tire
<IMG SRC="http://albums.photopoint.com/j/View?u=1654202&a=12666180&p=47327189&Sequence=0" border=0>

As you can see, I still room to drop the car approx. 3/4" or so.

Good Luck,
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Old 04-27-2001, 07:49 AM   #6
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FWIW I think the Oz P1's in 18 x 7.5 are ET50, though I'm sure someone can confirm or deny that.
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Old 04-27-2001, 08:41 AM   #7
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2001 6.0?RS


25PSI, calm down, and you are correct, wheel diameter has nothing to do with offset. But width does. If you were to get a 7.5" rim with a +53 offset (same as stock), then you would be moving the rim .25 inches closer to the strut and fender. Depending on how much room there is an what width tire you are planning to run, you MAY need to adjust the offset to match this. I am running an 8" wide wheel with a 225 series tire. I had to move my offset out 10mm to get it to clear the factory strut.

This was a valid question. Keep up the good work.
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Old 04-27-2001, 11:17 AM   #8
MY99 2.5GT
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1999 Legacy 2.5GT
12 Legacy GT 13 Armada


You might clear the struts with and 18X7.5" wheels with a +50 offset but your gonna rub the fender wells. If your going to run an 18X7.5 wheels watch out when you lower the car with suspension upgrades. You may be able to get a tire with a section width that is narrow enough to clear that lip that annoyingly sticks out on the inside edge of the outside fender well in the back. Try to go for lower than an 8.5" section width and you should be OK.

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Old 04-27-2001, 11:53 AM   #9
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Location: Atlanta, GA
2008 Impreza 2.5i


okie... here's a picture of my car that a friend of mine took... i took other pictures, but waiting development. this is my car lowered all the way down on a GC/AGX Show Setup, i have 18x7.5" wheels with a 50 offset. (oh yeah, tires are 215/40 p7000). the tire tucks into the rear nicely and my wheel wells aren't rolled. camber appears to be the same... and it looks real nice! no rub really during normal driving. i only experience rubbing when taking corners too hard, or going over those nasty bumps. not too much rub when it happens, but just enough to make you crinch when you hear it. i would drive this low all the time if i could... but dont want to hurt my poor AGXs!

<IMG SRC="http://www.enduserville.com/mastrotampa/PIC00004.JPG" border=0>

[This message has been edited by sanders (edited April 27, 2001).]
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Old 04-27-2001, 05:26 PM   #10
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Thumbs up

Holy Crap your car is TIGHT!!
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