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The Tire Rack's Tire & Wheel Forum
Use this forum to discuss anything in relation to wheels to tires to offsets.
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Old 04-16-2013, 07:28 PM   #1
tommytoyz
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Converting from staggered to squared

I am considering buying a set of style 68 wheels, which I think are 7.5 inch fronts and 8.5 inch rears.

Can I just put the same width tires on all 4 wheels to make a square set up, or what would I need to do to make it a square set up?

Excuse mt ignorance regarding tires and wheels.
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Old 04-17-2013, 08:22 AM   #2
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Quote:
Originally Posted by tommytoyz View Post
I am considering buying a set of style 68 wheels, which I think are 7.5 inch fronts and 8.5 inch rears.

Can I just put the same width tires on all 4 wheels to make a square set up, or what would I need to do to make it a square set up?

Excuse mt ignorance regarding tires and wheels.
You can mount tire size 225/45R17 on both the front 17X7.5" wheels and the rear 17X8.5" wide wheels with no problem.

http://www.tirerack.com/a.jsp?a=BN4&...ires/index.jsp
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Old 04-17-2013, 11:26 AM   #3
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You guys are great.

IN the squared set up like that, can I rotate the tires around like normal? Is the handling the same, as if all wheels were the same size? And finally, do all 4 wheels protrude equally to the outside of the car?

It would look strange if the fronts protruded more, seeming wider, than the rears.

Thanks so much!
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Old 04-17-2013, 12:28 PM   #4
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Quote:
Originally Posted by Gary@Tirerack View Post
You can mount tire size 225/45R17 on both the front 17X7.5" wheels and the rear 17X8.5" wide wheels with no problem.

http://www.tirerack.com/a.jsp?a=BN4&...ires/index.jsp
+1

And if you are looking to rotate your tires, you may want to just just get asymmetrical non-directional tires so you can switch the rears side to side, and switch the fronts side to side.
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Old 04-17-2013, 11:33 AM   #5
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I already decided on the Michelin Primacy MXM4. I installed the powerflex bushings and that tightens up the steering and suspension a bit, so softer tire is fine.
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Old 04-17-2013, 12:39 PM   #6
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Thanks Kevin. So Still rotate normally, right?
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Old 04-17-2013, 12:49 PM   #7
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You would be able to rotate them side to side, but I probably wouldn't rotate front to rear, or opposing corner, etc.

If you plan on flipping just the tires, you could get symmetrical and directional tires. That will also work, but you would need to dismount the tire and flip it to the other direction every time you wanted to "rotate".
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Old 04-17-2013, 12:57 PM   #8
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Thanks Kevin,

I guess the staggered style 68 is not a set up that easily allows for normal tire rotation, even if the tires are all the same size. Maybe someone with staggered Style 68 is willing to trade 2 so we both have the same size wheels and can both go with a totally squared setup...I just don't like having to chew through tires as with a staggered setup....
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Old 04-17-2013, 12:59 PM   #9
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Well what are the wheel specs?
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Old 04-17-2013, 01:05 PM   #10
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17 x 7.5 and 17 x 8.5 BMW Style 68
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Old 04-17-2013, 01:23 PM   #11
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Wheel offsets, specifically.
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Old 04-17-2013, 01:59 PM   #12
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I have the same wheels (Style 68).

The offsets are 41 mm front, 50 mm rear (on staggered Style 68s).
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Old 04-17-2013, 02:19 PM   #13
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Do your have the M3 logo on them? I think the M3 style 68s are not staggered?

http://www.bmwstylewheels.com/bmw/68
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Old 04-17-2013, 02:40 PM   #14
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You should not swap them front to rear then. I don't think the rear specs will clear your shocks up front.
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Old 04-17-2013, 02:51 PM   #15
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Even if they are the M3 style 68, with 7.5 inches on all 4s? Or is there something I am missing? Shouldn't that br a perfectly squared setup (M3 style 68, all 4 wheels at 7.5" each)? There should be no offset then, right?
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Old 04-17-2013, 06:08 PM   #16
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If the wheel specs are 17x7.5 ET41 and 17x8.5 ET50, the rears most likely could not be used up front. You should be able to use four fronts though.

Wheel offset is the distance between the back pad and the centerline of the wheel, therefore every wheel has an offset.
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Old 04-18-2013, 01:09 PM   #17
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Kevin, how can I check to see if the rears could or could not be used up front? Could I use spacers in back, when the smaller wheels/rims are in the rear and take the spacers off when the larger wheels/rims are in back? Provided of course, the larger ones fit in front.

thanks so much guys, I am learning....
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Old 04-18-2013, 01:50 PM   #18
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Well I'm almost positive it will hit the strut. I don't know exactly how much inner clearance you have, but if you know your stock wheel specs you can do simple calculations to determine how far in or out a different set of wheels woult sit.

In short you probably would want some spacers for that setup.
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Old 04-18-2013, 01:55 PM   #19
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Spacers in front and rear to neutralize the offset and allow clearance in front?
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Old 04-18-2013, 02:09 PM   #20
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You'd need some pretty large spacers in order to make the wheels more flush with the fenders...

We recommend 18x8.5 ET35/18x9.5 ET45. The difference in size would be 19mm up front, and 18mm in the rear.
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