A rear wheel suspension system for a bike, includes a seat tube, left and right side flexible chainstays, left and right side seatstays. A leaf spring interconnects the seatstays and the seat tube, wherein one end of the leaf spring is connected to the upper end area of said seatstays, the leaf spring extending upwardly from its point of connection to the upper end area of the seatstays to a point of connection to the seat tube of said bicycle. The leaf spring is arranged at a distance D to the seat tube in a direction perpendicular to top and bottom surfaces of the leaf spring to allow flex of the leaf spring towards the seat tube and thus vertical flex of said flexible chainstays.

A low travel rear wheel suspension system for a bike includes a seat tube, left and right side flexible chainstays each with its front end attached to the seat tube, left side and right side seatstay. In the area of the seat tube where it connects to the seatstays, the seat tube is split up into a seat tube posterior part and a seat tube anterior part, the seatstays connecting to the seat tube posterior part, and the seatstays not connecting directly to the seat tube anterior part. The seat tube posterior part and the seat tube anterior part connect to one another both above and below a seat tube cavity. The seat tube posterior part and the seat tube anterior part are configured to allow flex of the seat tube posterior part towards the seat tube anterior part, and thus allow vertical flex of the flexible chainstays.

A rear wheel suspension system for a bike includes a seat tube, a bottom bracket shell, left and right side flexible chainstays and a right side flexible chainstay, left and right side seatstays, and a set of dropouts located where the flexible chainstays and the seatstays interconnect for rotably supporting the rear wheel of the bicycle. The leaf spring is connected to the upper end area of the seatstays, and extends downwardly from its point of connection to the upper end area of the seatstays to a point of connection to the seat tube of the bicycle. The leaf spring is arranged at a distance D to the seat tube in a direction perpendicular to the top and bottom surfaces of the leaf spring to allow flex of the leaf spring towards the seat tube and thus vertical flex of the flexible chainstays.

A bicycle frame assembly that includes an upper frame member and a lower frame member that each extend between a head tube and a dropout. A seat tube extends between the upper frame member and the lower frame member. The seat tube is preferably connected to a bottom bracket of the lower frame member and is connected by a pivot to the upper frame member so that the seat tube can deflect from a rest position without altering an orientation of a top tube to a bottom tube of the upper and lower frame members, respectively.

A bicycle comprising a frame; a handlebar assembly attached to an upper steering tube of the frame in such a way that at least the relative rotation between the two with respect to an upper axis is allowed, but the relative displacements between both in the directions perpendicular to the upper axis are restricted; a fork attached to a lower steering tube of the frame so that it has the same degrees of freedom relative to the lower axis between the fork and the lower steering tube as the degrees of freedom relative to the upper axis between the handlebar assembly and the upper steering tube; and a means for rotation transmission for transmitting at least partially a rotation of the handlebar assembly with respect to the upper tube into a rotation of the fork with respect to the lower steering tube.

The present invention relates to a vehicle (100), in particular a bicycle, for performing tests for a driver assistance system. The vehicle (100) has a base body (101) and at least one strut (102), which is formed to be dimensionally stable without influence of an impact force, which is generatable upon a collision of the vehicle (100) with a collision body, and is elastically deformable upon influence of the impact force. The strut (102) is connected to the base body (101) such that upon influence of the impact force the strut (102) is non-destructively detachable from the base body (101).

A bicycle assembly can include a bicycle frame having a main frame and a sub-frame, and a shock absorber assembly. The shock absorber assembly can comprise a shock absorber and an extension body. The sub-frame can rotate in relation to the main frame and the shock absorber assembly can be used to regulate that relationship. An eccentric insert positioned functionally between the shock absorber and extension body can be used to modify the overall length of the shock absorber assembly to beneficially alter the geometry of the bicycle frame.

A collision testing vehicle is disclosed which can be utilized to perform testing with a driver assistance system. The collision testing vehicle includes a vehicle having a vehicle body. The vehicle is structured to be subject to an impact force during a collision with a collision body. A wheel is coupled to the vehicle body, and the wheel includes a detachable support that is configured to non-destructively detach from the wheel when subjected to the impact force.

A bike frame includes including a seat tube (10) for receiving 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). 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 comprising a frame; a handlebar assembly attached to an upper steering tube of the frame in such a way that at least the relative rotation between the two with respect to an upper axis is allowed, but the relative displacements between both in the directions perpendicular to the upper axis are restricted; a fork attached to a lower steering tube of the frame so that it has the same degrees of freedom relative to the lower axis between the fork and the lower steering tube as the degrees of freedom relative to the upper axis between the handlebar assembly and the upper steering tube; and a means for rotation transmission for transmitting at least partially a rotation of the handlebar assembly with respect to the upper tube into a rotation of the fork with respect to the lower steering tube.