United States CPSC standards require the Alpha One to be shipped with a coaster brake installed. A coaster brake is the type of brake the is operated by pedaling backwards.  Many parents/riders prefer to a bike without a coaster brake.  The freewheel kit allows the removal of the coaster brake and installation of a freewheel. It includes a complete extra wheel with a freewheel hub, tire and tube. Requires Installation.
Freewheel Kit Installation Instructions