Avid makes good bearings, and they are also $1.00 a pop. Just order $20.00 worth and you'll never lose a tank or bell again. Change weekly, and changing before your main or last qualifier is a good idea.
5x13
http://www.avidrc.com/shop/?action=i...=1&prevstart=0
5x10
http://www.avidrc.com/shop/?action=item&id=1
