Performance Inc., of Chapel Hill, N.C voluntarily recalled about 3,000 2007 and 2008 Performance Travel Trac Trainers because the springs in the resistance trainers can unhook and become a projectile, posing a puncture hazard to users or bystanders. As of the date of the recall, the company had received three reports of springs releasing from the bike trainers. The recalled trainers are folding stands that lift and apply resistance to the rear wheel of a standard bike, converting the bike into a stationary trainer. There are three Travel Trac (TT) models included in the recall. The TT Inertial and TT I-Force Wireless use the same stand, with a looping black base and two red bike support arms. Along the right arm is Travel Trac printed in white. "Millennium" is printed along the left arm of the stand on a vertical white decal. TT Inertial and I-Force Wireless have black horizontal decals. The TT Millennium I-Force has a collapsible black stand with Travel Trac and I-Force vertical white decals and Inertial in small red letters. The item numbers are printed on the bottom of the last page of the owner's manual. The products were sold through Performance stores nationwide, and Performance's Web site and catalogs from October 2006 through March 2008 for between $330 and $400.