US Patent 8960702 Electric bicycle

An electric bicycle and electric bicycle frame including batteries or a battery pack stored in one or more tubes of the frame. In some cases, a pair of top tubes extend rearward of the bicycle seat tube, and an electronics housing may be disposed between the rearward extending top tube portions. Alternatively or in addition, a removable bottom bracket shell portion and a removable bottom bracket insert may be provided, to allow convenient access to the interior portions of the down tube and/or seat tube of the frame. A battery pack and/or a battery electronics management unit may be conveniently within one or both of the down tube and the seat tube.