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Old 11-21-2009, 01:19 AM   #1
irish44j
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85 BMW E30 M2 Rallycrossr

Default wheel offset difference, which way to go in this situation?

A bit of a theoretical situation. Assuming all other suspension settings remain the same. Assuming that tires are the same. Assuming there are no clearance issues with either. Tires are 225/45/17 RE01R's...

Wheel 1: 17x7.5, ET48

Wheel 2: 17x7.5 (same wheel), ET53.

The question for discussion: Which is better for the typical autocross course? Does the 10mm overall extra stance width benefit outweigh any (presumably negative) impact on scrub radius angles and turn-in?

Just thinking out loud here and interested in what everyone thinks.
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Old 11-21-2009, 08:32 AM   #2
sniper1rfa
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I have a feeling the difference would be totally unnoticeable.
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Old 11-21-2009, 08:43 AM   #3
KC
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Nothing noticeable on either wheel. The 48mm gives you 10mm more track.

Down the road, if you want a wider tire, the 48mm may want the fenders rolled.

--kC
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Old 11-21-2009, 11:22 AM   #4
Butt Dyno
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Eh, with wide 245 Dunlops and 17x8 +45s I barely need a roll in the rear only (it rubs a little on the highway when the car is loaded with autox gear). I would not worry about that.
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Old 11-21-2009, 10:53 PM   #5
irish44j
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i figured not, but it was just a random though, lol....
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Old 11-22-2009, 12:55 PM   #6
STirish
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I won't tell you what is better, but I can say a 10mm track change can be felt in back to back runs.

Rob
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