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      10-23-2012, 11:18 AM   #23
em5464
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Vibration fixed

Quote:
Originally Posted by urBan_dK View Post
Can you get a .1 mm thick hubcentric ring? I noticed the Apex wheels fit on a bit more loosely than the factory wheels, enough that they don't bind when attempting to remove them like the factory ones. Perhaps this is part of my issue....
Glad to report that the vibration in the steering wheel (75mph - 85 mpg) was fixed. The shop put the front wheels on the Hunter 9700 road force balance machine and one of the wheels was off by 1oz. Added more weights and the vibration is gone.

I guess sometimes you have to start with a systematic approach to the elimination process, by looking at the most obvious thing (wheel balancing).

To UrbanDK:

BMW E90 M3 centerbore is 72.56mm and the APEX wheels are 72.6 mm. That 0.04 difference is not a cause/suspect for the vibration.
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      10-23-2012, 11:48 AM   #24
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Quote:
Originally Posted by hova00 View Post
You can from the place i bought mine from. I actually bought 0.5mm and they are made from metal so they last more than one use if you decided to swap wheels for the season.
Did you use those on Apex wheels? There bores are only .04mm off according to someone else posting in this thread, so those seem too thick.
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      10-23-2012, 04:44 PM   #25
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Quote:
Originally Posted by em5464 View Post

BMW E90 M3 centerbore is 72.56mm and the APEX wheels are 72.6 mm. That 0.04 difference is not a cause/suspect for the vibration.
Absolutely correct.
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      10-23-2012, 04:56 PM   #26
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Quote:
Originally Posted by Malek@MRF View Post
Are your tires match mounted? (where the lightest part of the tire is mounted onto the heaviest past of the wheel, basically where the TPM sensor is located?)

The front bushings are also a problem on this car. They transmit a lot of harmonic vibration.
Match mounting is a black art that nobody does anymore.Match mounting takes much longer to do, hence why nobody does it.

Weights eliminates the need for match mounting. A tire can be roadforce balanced with weights in a few minutes.
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      10-23-2012, 04:57 PM   #27
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I guess sometimes you have to start with a systematic approach to the elimination process, by looking at the most obvious thing (wheel balancing).
+1
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      11-04-2012, 11:11 PM   #28
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Updated original post. Still have the vibration with brand new tires in front. Wheels are road force balanced, and measured within tolerance by two shops.
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      11-05-2012, 12:15 AM   #29
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Quote:
Originally Posted by urBan_dK View Post
Updated original post. Still have the vibration with brand new tires in front. Wheels are road force balanced, and measured within tolerance by two shops.
If the front wheels have been balanced and you still have this problem, try swopping the front wheels out with another set. Ask the dealer if they will put another set of wheels from another BMW on and test drive it or your front wheels on another car and test drive. My local BMW dealer did that one Saturday but their technition offered to not charge me and re-balance all my wheels and we did exactly that. Worth asking.

If the problem is the same with different wheels on your car or you test drive another BMW with your wheels and there is no vibe, then that's one possability checked off. Now you can consentrate on something else.

By the way, I posted earlier on this post about my problem and it seems to be just pad buildup on my rotors. Did several hard braking run-in events and the vibration is gone. What brakes are you running? I have a vibration at about 80mph just cruising and started about 1 month ago and now its gone.
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