Joined: Mar 2008
Posts: 5,559
Likes: 53
From: The 'Wack, BC, Canada
Bikes: Norco (2), Miyata, Canondale, Soma, Redline
Just push the valve area in and hold it while you seat the rest of the tire.
It may well be the brand of tube you're using. I've never had an issue with the tube around the valve area.