2008 Dahon and REI Novara Folding Bicycles can cause the rider to fall.
The Consumer Product Safety Commission says the hinge on the handlepost can crack.
That creates a fall risk while in use.
The bikes were sold at authorized Dahon dealers and at REI or Recreational Equipment Inc stores nationwide from March 2008 through April 2009.
Either one will arrange for a free inspection and repair.
Contact Dahon California at 1-800-442-3511 or visit the firm's Web site at www.dahon.com