Abstract: Bike comprising a first frame element extending from one end carrying a front wheel housing to a lower end, a second frame element extending to a lower end rigidly fixed to the first lower end, a rear fork comprising a chainstay extending from the first element to a spindle support and a seat stay extending from the spindle support to the second element, a crankset having a lateral chainring, a rear wheel driven by a sprocket inside the fork, a belt engaged with the chainring and the sprocket. The chainstay has a major portion arranged below a straight line passing through the lower ends of the chainring and of the sprocket. The belt extends through the triangle formed by the second frame element, the chainstay and the seat stay, which form an irremovable assembly.

Abstract: Bike comprising a first frame element extending from one end carrying a front wheel housing to a lower end, a second frame element extending to a lower end rigidly fixed to the first lower end, a rear fork comprising a chainstay extending from the first element to a spindle support and a seat stay extending from the spindle support to the second element, a crankset having a lateral chainring, a rear wheel driven by a sprocket inside the fork, a belt engaged with the chainring and the sprocket. The chainstay has a major portion arranged below a straight line passing through the lower ends of the chainring and of the sprocket. The belt extends through the triangle formed by the second frame element, the chainstay and the seat stay, which form an irremovable assembly.

Abstract: Steering assembly for a two-wheeler comprising a frame, a handlebar and a fork holding a steering front wheel. The steering assembly comprises a head tube rigid with the frame and defining a swivel axis, a steering rod mounted swivelling through the head tube and connected on the one hand to the handlebar and on the other hand to the fork. A torque generation device comprises an elastically deformable component arranged in a space inside the steering assembly and surrounding the steering rod. The elastic component having a first portion that cooperates with the tube and a second portion that cooperates with the rod, so as to create restoring torque when the steering rod swivels through at least a given angle with respect to a neutral angular position corresponding to travel in a straight line.