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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 > +40 and +45 offset on E90 sedan??



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      12-07-2007, 12:09 PM   #1
blacktzak
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+40 and +45 offset on E90 sedan??

I have an 08 335i sedan with sport package and am shopping for some cheap rims I can thrash around town and on the track. CSL's look pretty sweet in Matte black. Tirerack and a few other online sites seem to think that running a +40 front/ +45 rear offset will work well. I know the stock offsets are +34 front/ +37 rear.

My question is will this change throw off the dynamics of the car? Will it destroy DTC as my dealer claims?
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      12-07-2007, 02:00 PM   #2
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No you will be fine with those offsets, it's just going to be really tucked in.
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      12-08-2007, 02:10 AM   #3
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seems like it would make a difference...

I guess it just doesn't make much sense that it would not affect handling adversely.
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      12-08-2007, 10:21 AM   #4
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Quote:
Originally Posted by blacktzak View Post
I guess it just doesn't make much sense that it would not affect handling adversely.
I have CSLs in et 35fr/30r setup and I have been having no problem at all.....
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      12-09-2007, 06:54 AM   #5
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I'll just hijack this thread.

What ET is ideal for the front wheels without rubbing but at the same time getting them as flush as possbile with the fender?

The rim is 8x18.
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      12-09-2007, 04:40 PM   #6
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a 35 offset in the front would be pretty flush

35 front 30 rear would be pretty flush
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      12-09-2007, 05:00 PM   #7
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Quote:
Originally Posted by blacktzak View Post
I have an 08 335i sedan with sport package and am shopping for some cheap rims I can thrash around town and on the track. CSL's look pretty sweet in Matte black. Tirerack and a few other online sites seem to think that running a +40 front/ +45 rear offset will work well. I know the stock offsets are +34 front/ +37 rear.

My question is will this change throw off the dynamics of the car? Will it destroy DTC as my dealer claims?
No one can help unless you have the rim width. If you went 1/2" bigger in the front and rear rims then you are at the default nominal offset so it will stick out 1/4" and 1/4" more inwards so this would be perfect and no effects on the car dymanics as your srub raduis has not changed.

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      12-09-2007, 07:17 PM   #8
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OK, sure, you're tucking the wheels in closer. You're dealers an idiot telling you it'll mess with DTC. It never ceases to amaze my what kind of bullshit they'll spew to get you to buy from them.

By tucking the wheels in closer, you are narowing the track which will raise the effective moment arm of the center of gravity over the wheels, making the car easier to tip. There, that's the difference.

I'm laughing because you'd need MATLAB to calculate the difference. If you don't have degree in Engineering or Applied Mechanics or something, you'll never be able to even calcualte the difference. And there's no way in hell you'll feel any difference.

Don't worry about it.
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      12-10-2007, 04:01 PM   #9
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try not to go lower than 30mm offset all around, and dont try to go over 38mm offset all around.
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      12-10-2007, 04:52 PM   #10
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+22 rear offset on my csl's and im thinking about putting a 5mm spacer on the front
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