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      10-10-2008, 07:59 PM   #10
ben@tirerack
M3Post Supporting Vendor
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Drives: 740i
Join Date: Mar 2008
Location: South Bend, IN

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Quote:
Originally Posted by rldzhao View Post
Hi Ben,

while you are here. Quick question for you. What are the disadvantages of using spacers?

Thanks!
For street use, other than having an extra part to deal with when installing or removing wheels, it is not generally an issue. Radically increasing the track with large spacers can have some effect on steering feel. Obviously you can go too wide and get rubbing issues, but that just means you need a smaller spacer.

You should run a lug bolt with an increase in length ~equal to the thickness of the spacer to ensure proper thread engagement.

For track use, spacers are not recommended, because under the extreme stress of track driving, the longer lug bolts come under more strain and can break off due to metal fatigue. If your track wheels use spacers, replace the bolts at least every season.
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I have accepted a new position at Tire Rack and am no longer in the sales department. gary@tirerack.com is available to assist with M3 questions.