A bicycle sprocket assembly comprises a first sprocket and a second sprocket. The first sprocket includes a first sprocket body, first sprocket teeth, and a first pitch circle. The first pitch circle has a first diameter. The second sprocket includes a second sprocket body, second sprocket teeth, and a second pitch circle. The first sprocket teeth include a large-sprocket downshifting tooth and an additional large-sprocket downshifting tooth. The second sprocket teeth include a first small-sprocket downshifting tooth, a second small-sprocket downshifting tooth, a first adjacent tooth, and a second adjacent tooth. A circumferential area is defined from a driving surface of the first adjacent tooth to a non-driving surface of the second adjacent tooth in a driving rotational direction about a rotational center axis when viewed in an axial direction. The large-sprocket downshifting tooth is disposed in the circumferential area when viewed in the axial direction.

A right crank arm assembly for a bicycle has a right crank arm and at least one toothed crown that is coupled to the right crank arm. At least one damping element is arranged between the right crank arm and the toothed crown to be in abutment against respective faces of the right crank arm and the toothed crown.

The device for the motion transmission onto cycles comprises: a connecting core able to be associated with a frame of a cycle in a rotatable way around an axis of rotation; and a ring gear lying on a lying plane surrounding the core and able to be coupled to a flexible transmission element closed on itself in a loop for starting said cycle along a direction of forward movement; oscillation means placed between the connecting core and the ring gear and able to tilt the lying plane with respect to the axis of rotation.

A chain guide for a bicycle having may include a base frame and a height adjustment member connected to the base frame and slidable relative to the base frame and lockable in a first position by engaging a first locking member. A retaining member may be pivotally connected to the height adjustment member and may be pivotable about a pivot axis a retaining position, in which the retaining member is positioned to obstruct lateral movement of the chain away from the chainring thereby preventing lateral misalignment between the chain and the chainring, and a removal position, in which the retaining member does not obstruct lateral movement of the chain away from the base frame while the height adjustment member is locked in the first position. The pivot axis may be spaced apart from the first locking member.

A toothed wheel assembly that has at least two toothed wheels. Each toothed wheel has a plurality of teeth separated from one another by corresponding troughs and the second toothed wheel has a greater number of teeth than the number of teeth of the first toothed wheel. A plurality of connection bodies connect the first and second toothed wheels axially and space them. Each connection body has a first connection portion that is connected to the second toothed wheel and extends radially from the second toothed wheel towards the first toothed wheel and a second connection portion connected to the first toothed wheel that extends axially from the first toothed wheel. The second connection portion of each connection body has a circumferential bulk the radial projection of which is completely contained in a trough of the first toothed wheel.

A bicycle sprocket has a sprocket main body, a plurality of teeth disposed on the sprocket main body, and at least one shifting area. The teeth include at least one first tooth having a first maximum axial width and at least one second tooth having a second maximum axial width. The first maximum axial width is larger than the second maximum axial width. The first tooth is configured to engage with an outer link plate of a chain. The second tooth is configured to engage with an inner link plate of the chain. The at least one shifting area includes an area where a chain engages with one of the teeth during shifting from a small sprocket to the bicycle sprocket and an area where the chain separates from one of the teeth during a shifting action from the bicycle sprocket to the small sprocket.

A multi sprocket arrangement is configured for mounting on a driver of a bicycle wheel. The multi sprocket arrangement includes a plurality of adjacent sprockets each of the plurality of sprockets having a different number of teeth. The plurality of adjacent sprockets include a first sprocket having a first inner diameter which is larger than an outer diameter of a profile base of a carrier profile of the driver, and a second sprocket having a second inner diameter which is smaller than the outer diameter of the profile base of the carrier profile of the driver. The first sprocket and the second sprocket are connected together by welding.

A chain ring for engaging a chain link of a chain, the chain ring including an inner edge fully circumscribing both an opening and an axis of rotation, an inner surface extending between the inner edge and an outer edge where a plurality of chain ring teeth emanate, and a plurality of ramps disposed about the inner surface, wherein at least one of the plurality of ramps includes a lifting surface for initiating lift of a chain without assistance from the plurality of chain ring teeth. The lifting surface extends radially along the inner surface toward the outer edge, and the at least one ramp has a first end proximate the inner edge and a second end proximate the outer edge. The second end of the at least one lifting surface terminates before reaching the bottom of a trough positioned between two or more of the plurality of chain ring teeth.

A drive arrangement for a bicycle may include a plurality of sprockets arranged at a rear wheel of the bicycle. The sprockets may be particularly arranged to have a spacing that facilitates the configuration of an increasing number of sprockets in the plurality of sprockets. A singular front sprocket or chain ring may be used to drive the rear plurality of sprockets. The singular front chain ring may include first and second groups of teeth, the first group of teeth being wider than the second group of teeth. The drive arrangement may also include a rear derailleur. A chain having inner link plates with recesses may also be include in the drive arrangement.

A bicycle sprocket comprises at least one chain engaging member constituting at least a part of at least one sprocket tooth of the bicycle sprocket. The at least one chain engaging member is configured to contact a bicycle chain in a state where the bicycle chain engages with the bicycle sprocket. The at least one chain engaging member is made of a first material. At least one bicycle attachment member constitutes at least a part of a sprocket body of the bicycle sprocket. The at least one bicycle attachment member is configured to be coupled to a bicycle. The at least one bicycle attachment member is made of a second material that is different from the first material. At least one shifting facilitation area is provided in the at least one chain engaging member to facilitate a shifting operation of a bicycle chain.