A bicycle frame is discussed having a battery fully contained within a down tube of the bicycle frame. The battery may be inserted into or removed from the down tube via a through opening through a bottom bracket housing of the bicycle frame. Weakness in the bottom bracket housing due to the through opening may be compensated for, fully or partially, by utilizing a bottom bracket bearing assembly that has a structural component, or structural component assembly, that extends completely through the bottom bracket housing and removably couples to the bottom bracket housing.

A bike frame includes including a seat tube (10) configured to receive a seatpost (2), a front portion comprising a top tube (13) connecting the seat tube (10) to a head tube (16), the seat tube (10), the top tube (13). The head tube (16) extends in a plane of symmetry of the bike frame (1). A rear portion has two chain stays (11a, 11b) and two seat stays (12a, 12b) arranged symmetrically relative to the plane of symmetry of the bike frame (1). Each seat stay (12a, 12b) has a perpendicular cross-sectional profile that is elongated in a direction parallel to the plane of symmetry. The two seat stays (12a, 12b) are independent of each other and the two seat stays (12a, 12b) have a preform that is curved along at least one arc in a plane passing through the two seat stays, so as to enable the two seat stays to move away from or closer to each other under the action of a vertical load.

A bike frame includes including a seat tube (10) configured to receive a seatpost (2), a front portion comprising a top tube (13) connecting the seat tube (10) to a head tube (16), the seat tube (10), the top tube (13). The head tube (16) extends in a plane of symmetry of the bike frame (1). A rear portion has two chain stays (11a, 11b) and two seat stays (12a, 12b) arranged symmetrically relative to the plane of symmetry of the bike frame (1). Each seat stay (12a, 12b) has a perpendicular cross-sectional profile that is elongated in a direction parallel to the plane of symmetry. The two seat stays (12a, 12b) are independent of each other and the two seat stays (12a, 12b) have a preform that is curved along at least one arc in a plane passing through the two seat stays, so as to enable the two seat stays to move away from or closer to each other under the action of a vertical load.

A bicycle frame assembly including a seat tube having first and second end portions (wherein the seat tube second end portion includes a bend and terminates in a first open end facing a first direction), a down tube having first and second end portions (wherein the down tube first end portion is mounted to the seat tube first end portion, and the down tube second end portion includes a bend and terminates in a second open end facing a second direction opposite to the first direction), and a top tube having first and second end portions (wherein the top tube first end portion is mounted to the seat tube second end portion and terminates in a third open end facing the first direction, and the top tube second end portion is mounted to the down tube second end portion and terminates in a fourth open end facing the second direction).

A bicycle frame is discussed having a battery fully contained within a down tube of the bicycle frame. The battery may be inserted into or removed from the down tube via a through opening through a bottom bracket housing of the bicycle frame. Weakness in the bottom bracket housing due to the through opening may be compensated for, fully or partially, by utilizing a bottom bracket bearing assembly that has a structural component, or structural component assembly, that extends completely through the bottom bracket housing and removably couples to the bottom bracket housing.

A bicycle frame is discussed having a battery fully contained within a down tube of the bicycle frame. The battery may be inserted into or removed from the down tube via a through opening through a bottom bracket housing of the bicycle frame. Weakness in the bottom bracket housing due to the through opening may be compensated for, fully or partially, by utilizing a bottom bracket bearing assembly that has a structural component, or structural component assembly, that extends completely through the bottom bracket housing and removably couples to the bottom bracket housing.

A tube-embedded GPS box installation locking structure includes a crossbar. The interior of the crossbar is provided with a GPS locator body; butt holes are formed in positions, close to edges on both sides, of a bottom of the GPS locator body; and the interior of each of the two butt holes is provided with a nylon sleeve. In the application, an interior of the crossbar is arranged to be hollow, and the GPS locator body is installed to the interior of the crossbar, the butt holes are formed in the positions, close to the edges on both sides, of the bottom of the GPS locator body during installation, and the interior of each of the two butt holes is provided with the nylon sleeve, so that the GPS locator body is conveniently fixed and locked at the bottom of the crossbar by bolts.

The invention relates to a bicycle frame (10), with a front part (11) defined by a head tube (1), a down tube (2), a top tube (3) and a strut tube (7) and a rear part (12) defined by the strut tube (7) and a set of tubes connecting to a rear wheel axle, usually a pair of seat stays (5) and a pair of chain stays (6). The frame also comprises a cantilevered seat tube (4), between an upper end (4a) and a lower end (4b). The seat tube (4) is connected to the strut tube (7), to the top tube (3) and to the seat stays (5). In the frame (10) of the invention, the top tube (3), the seat tube (4) and also the strut tube (7) and the seat stays (5) are connected to the lower end of the seat tube (4). This geometry is particularly advantageous for reducing the vertical stiffness and the bending stiffness of the seat tube (4).

A tube-embedded GPS box installation locking structure includes a crossbar. The interior of the crossbar is provided with a GPS locator body; butt holes are formed in positions, close to edges on both sides, of a bottom of the GPS locator body; and the interior of each of the two butt holes is provided with a nylon sleeve. In the application, an interior of the crossbar is arranged to be hollow, and the GPS locator body is installed to the interior of the crossbar, the butt holes are formed in the positions, close to the edges on both sides, of the bottom of the GPS locator body during installation, and the interior of each of the two butt holes is provided with the nylon sleeve, so that the GPS locator body is conveniently fixed and locked at the bottom of the crossbar by bolts.

A cross frame for a bicycle, such as an e-bike, includes a head tube and a seat tube with a bottom bracket area arranged at the lower end of the seat tube, a straight first tube starting from the head tube which crosses the seat tube and then extends towards a rear dropout of a rear triangle of the cross frame, a second tube starting from the head tube above the first tube which crosses the first tube at an intersection and then extends towards the bottom bracket area, and at least one chain stay extends from the bottom bracket area to the rear dropout. The second tube has an angular deflection within the plane of the frame in the section between the head tube and the intersection to create a visually appealing frame that offers high stability and torsional rigidity with minimal weight and allows for improved handling of a bicycle equipped with the frame.