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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Wheels and Tires Forum Sponsored by The Tire Rack > offset for advan rs ( track )



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Wheel offset calculator courtesy of BimmerPost.com. You may use this calculator to calculate what tire sizes you might need if you upgrade your tires, or what wheel sizes/offsets are compatible with your car.
    Current Wheel Width  inches             Current Wheel Offset  mm.
         New Wheel Width  inches                  New Wheel Offset  mm.
 
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ORIGINAL TIRES
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NEW TIRES
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Based on your stock wheel setup, your new wheel will have:
Original Tires Diameter (in.)
      New Tires Diameter (in.)
  Difference in diameter (in.)
           Percent Difference %
                     
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      05-07-2008, 06:59 AM   #1
ngewe
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offset for advan rs ( track )

getting a set of advan rs for the track 18x8.5 18x9.5
what offset should i use for the track?

imagine turning into a corner at 180 i think i need to get it right on the offset


please advise

thanks
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      05-07-2008, 08:21 AM   #2
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      05-07-2008, 08:26 AM   #3
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35 offset will work with a coupe or a sedan
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      05-07-2008, 12:49 PM   #4
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how about 35 front 25 rear?
would it be perfect
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      05-07-2008, 01:06 PM   #5
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+25 on a 9.5" rim is very close to flush with the fender. I assume you have the E90. For the street, I would run +25 no problem, but for the track, I would not get it so close, I would run +35 or at most, +30.

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      05-07-2008, 06:29 PM   #6
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I would agree with the above poster, you dont want to be rubbing your way around the race track!

I would go with 18x8.5 et 32 up front and 18x9.5 et 35 in back. PM me for pricing or any other information, they're a great set of track wheels!
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      05-07-2008, 09:26 PM   #7
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yea i dont wanna be rubbing everytime i turn....
so i was considering 35 front 30 rear....
However im also using this set of wheels for the road therefore i didnt want something that would look ugly...
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      05-07-2008, 09:44 PM   #8
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Well if you are serious enough to buy track wheels, I assume you are pretty serious. So that probably means "aggressive" alignment job right?

+25 gets my vote!

On another note, increasing the "track" in the rear also decreases oversteer.
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      05-14-2008, 11:23 PM   #9
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would a +35 offset in the rear make the wheel look too in or something?

cause im leaning towards 35 front 30 rear + 235/265 tires + rolled fenders + super stiff coilovers.

will this set up rub?
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      05-15-2008, 01:03 AM   #10
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Quote:
Originally Posted by ngewe View Post
would a +35 offset in the rear make the wheel look too in or something?

cause im leaning towards 35 front 30 rear + 235/265 tires + rolled fenders + super stiff coilovers.

will this set up rub?

If you have an E90 and "sport" wheels, then the stock rear is 8.5" wide with ET of 37. If you change that to a 9.5" wheel with ET 35, the outer edge of the rim will extend 15mm further out than stock. I don't think that it will look "too far in."
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      05-15-2008, 09:09 AM   #11
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Check this link and watch when he posts the pics of his car. He's going to post pics after the weekend photo shoot.
He's running 19" with et32 fronts and 35 rears. They don't look tucked in at all to me. I think you'll be fine with the 35 rears. If you rub often on the track you can cut a tire and run into all sorts of trouble.
http://www.e90post.com/forums/showthread.php?t=141818
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      05-15-2008, 09:42 AM   #12
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Quote:
Originally Posted by ngewe View Post
would a +35 offset in the rear make the wheel look too in or something?

cause im leaning towards 35 front 30 rear + 235/265 tires + rolled fenders + super stiff coilovers.

will this set up rub?
I would still run +35 in the rear. You are going to the track where performance is the goal, not looking cool. Like I said, for the street, +30 or even +25, but not for the track.

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      05-15-2008, 10:16 AM   #13
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so 35 front and rear guys?
or 32 front and 35 rear?

thanks for all the comments/advice !
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      05-15-2008, 10:22 AM   #14
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Either one will work.

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