Drums are "turned" (lathe cut) on the inner surface to assure that they are round and smooth. It is common to have visible runout on the outside of the drum even when the inside is nearly perfectly round. Of course the reverse can be true also. The outside can appear to be very round as it rotates and yet the inside surface can be sufficiently out of round as to cause vibrations during braking. Marshall Goodknight Please note: message attached From: LUCKYL46@xxxxxxx To: Chrysler300@xxxxxxxxxxxxxxx Subject: [Chrysler300] Re: still have rumble strips Date: Sat, 7 Apr 2012 08:01:25 -0400 (EDT) ____________________________________________________________ 53 Year Old Mom Looks 33 The Stunning Results of Her Wrinkle Trick Has Botox Doctors Worried http://thirdpartyoffers.juno.com/TGL3131/4f8037e15e6f5188a35st02duc [Non-text portions of this message have been removed] ------------------------------------ To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx To unsubscribe from this group, send an email to bob@xxxxxxxxxxxxx or go to http://autos.groups.yahoo.com/group/Chrysler300/join and select the "Leave Group" button For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/search.htm#querylangYahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Chrysler300/join (Yahoo! ID required) <*> To change settings via email: Chrysler300-digest@xxxxxxxxxxxxxxx Chrysler300-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/