The wheel covers shouldn't move that much, but one thing that helps is to have fresh valve stems. Old ones that are dry and brittle are more likely to break when stressed that way. The wheel cover should not be sharp where the valve stem goes through it. You should take a look at the offending wheel cover and see if the edges around the hole are turned in. It would also be advisable to try another wheel cover and do so until you find one that doesn't "slide" on the rim. Paul In a message dated 7/18/2004 1:09:52 PM Eastern Daylight Time, "Jeffrey M. Fastov" <jfastov@xxxxxxxxxxxxx> writes: >what do people do when hubcaps slide and split the valve stems.this seems to >be �an ongoing problem amd very inconvenient when i wake up to flats.any >ideas? > > > >----------------- �http://www.imperialclub.com �----------------- >This message was sent to you by the Imperial Mailing List. Please >reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be >shared with everyone. Private messages (and attachments) for the >Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx >To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm > >