A bearing structure for a shaft includes a shaft on which a male thread section is formed and a concave section recessed inside in a radial direction is partially formed in a circumferential direction thereof, a cylindrical holder in which the shaft is disposed, a bearing attached between the shaft and the holder and configured to rotatably support the shaft at an opening side thereof at which the holder is open, a thread engagement member having a female thread section threadedly engaged with the male thread section and a flat surface section crossing the circumferential direction of the shaft and formed on an outer circumference thereof, and coaxially threadedly fastened to the shaft from the opening side, and a locking member having a convex section fitted into the concave section and an engaging section engaged with the flat surface section, and partially locked to the shaft and the thread engagement member.

A split handlebar assembly for an aerodynamic bicycle having a handlebar stem for attaching said split handlebar assembly, comprising a right handlebar and a left handlebar; the right handlebar having a mounting section at one end, and a right grip section at the other end; the left handlebar having a mounting section at one end, and a left grip section at the other end; the right handlebar mounting section being configured to engage with the left handlebar mounting section; and the engaged mounting sections being configured to secure the right handlebar and the left handlebar to the handlebar stem.

A mounting specification adjustable front fork mount for mounting on a bike rack on a car roof to cooperate with a quick release for securing a bicycle front fork is disclosed to include a holder having a shaft tube with a protruding portion at each of two opposite ends of the shaft tube, and two mounting tubes each having a first coupling recess and a second coupling recess so designed that the bottom of the first coupling recess and the bottom of the second coupling recess are respectively spaced from the distal end of the mounting tube by a different distance. The protruding portion at each end of the shaft tube can be selectively engaged into the first coupling recess or the second coupling recess according to the specification of the bicycle front fork.

A mounting specification adjustable front fork mount for mounting on a bike rack on a car roof to cooperate with a quick release for securing a bicycle front fork is disclosed to include a holder having a shaft tube with a protruding portion at each of two opposite ends of the shaft tube, and two mounting tubes each having a first coupling recess and a second coupling recess so designed that the bottom of the first coupling recess and the bottom of the second coupling recess are respectively spaced from the distal end of the mounting tube by a different distance. The protruding portion at each end of the shaft tube can be selectively engaged into the first coupling recess or the second coupling recess according to the specification of the bicycle front fork.

A steering assembly for a bicycle includes a front fork that includes an upper crown, a lower crown, and a rigid crown connector that connects the upper crown to the lower crown. The steering assembly also includes an upper cone configured to mount to the upper crown of the front fork. The upper cone includes an upper cone bearing interface configured to interact with an upper bearing assembly seated in an upper portion of a head tube of a bicycle frame. The steering assembly also includes a lower cone configured to mount to the lower crown of the front fork. The lower cone includes a lower cone bearing interface configured to interact with a lower bearing assembly seated in a lower portion of the head tube of the bicycle frame.

A steering assembly for a bicycle includes a front fork that includes an upper crown, a lower crown, and a rigid crown connector that connects the upper crown to the lower crown. The steering assembly also includes an upper cone configured to mount to the upper crown of the front fork. The upper cone includes an upper cone bearing interface configured to interact with an upper bearing assembly seated in an upper portion of a head tube of a bicycle frame. The steering assembly also includes a lower cone configured to mount to the lower crown of the front fork. The lower cone includes a lower cone bearing interface configured to interact with a lower bearing assembly seated in a lower portion of the head tube of the bicycle frame.

A vehicle includes a vehicle body and a front wheel that is disposed anterior to the vehicle body and that is steerable about a steering axis. The vehicle body includes a vehicle body frame and a steering rotation unit that is supported on the vehicle body frame and that rotates about the steering axis. The vehicle includes a variable trail length mechanism. The variable trail length mechanism includes an oscillation unit that supports front forks that are disposed to be oscillatable in a fore-aft direction and that support the front wheel, and an electric motor that oscillates the oscillation unit. The electric motor is supported by the vehicle body.

A vehicle includes a vehicle body and a front wheel that is disposed anterior to the vehicle body and that is steerable about a steering axis. The vehicle body includes a vehicle body frame and a steering rotation unit that is supported on the vehicle body frame and that rotates about the steering axis. The vehicle includes a variable trail length mechanism. The variable trail length mechanism includes an oscillation unit that supports front forks that are disposed to be oscillatable in a fore-aft direction and that support the front wheel, and an electric motor that oscillates the oscillation unit. The electric motor is supported by the vehicle body.

An adjustable head angle bicycle assembly includes a steerer tube; a head tube that includes a first annular surface protruding radially inward from an inner wall at the upper end, and a second annular surface protruding radially inward from the inner wall at the lower end; an upper cup that includes a third annular surface engaged with the first annular surface of the head tube; and a lower cup that includes a fourth annular surface engaged with the second annular surface of the head tube.

An adjustable head angle bicycle assembly includes a steerer tube; a head tube that includes a first annular surface protruding radially inward from an inner wall at the upper end, and a second annular surface protruding radially inward from the inner wall at the lower end; an upper cup that includes a third annular surface engaged with the first annular surface of the head tube; and a lower cup that includes a fourth annular surface engaged with the second annular surface of the head tube.