A chainring protection system includes a chainring having a torque input section and a torque output section. The torque output section is radially outer relative to the torque input section and has a plurality of teeth. The chainring protection system also includes a cover connected to the chainring, such that the cover at least partially covers a circumferential portion of the torque output section. The circumferential portion of the torque output section includes less than all teeth of the plurality of teeth.

A chainring protection system includes a chainring having a torque input section and a torque output section. The torque output section is radially outer relative to the torque input section and has a plurality of teeth. The chainring protection system also includes a cover connected to the chainring, such that the cover at least partially covers a circumferential portion of the torque output section. The circumferential portion of the torque output section includes less than all teeth of the plurality of teeth.

A crank set for a two-wheeler, the crank set comprising a crank with a crank spider, a chainring and a chain guard ring, the chainring being fastened to the crank spider by fastening elements, and the fastening elements pressing the chainring and the crank spider against one another along a pressing direction. A clamped area of the chain guard ring is clamped in a clamping zone between at least one of the fasteners by which the chainring is secured to the crank spider and the crank spider or chainring and thereby secured to the crank set.

A crank set for a two-wheeler, the crank set comprising a crank with a crank spider, a chainring and a chain guard ring, the chainring being fastened to the crank spider by fastening elements, and the fastening elements pressing the chainring and the crank spider against one another along a pressing direction. A clamped area of the chain guard ring is clamped in a clamping zone between at least one of the fasteners by which the chainring is secured to the crank spider and the crank spider or chainring and thereby secured to the crank set.

An e-bike includes a frame assembly, wheels supporting the frame assembly, a motor assembly coupled to the frame assembly by a motor fastener having a hollow portion, and an accessory component coupled to the frame assembly by an accessory fastener positioned at least partially in the hollow portion of the motor fastener.

A device and a method of using the same, the chain cleaning device forming a bath-like cavity in the lowest point of the chain travel, around the rear sprocket of a motorcycle or another rotating part of a chain-driven mechanism. This device allows for the chain to be completely or partially submerged in chain cleaning liquid, allowing for best coverage of chain cleaning liquid on the chain, a more efficient and thorough cleaning and minimizing the waste of the liquid and the pollution.

An e-bike includes a frame assembly, wheels supporting the frame assembly, a motor assembly coupled to the frame assembly by a motor fastener having a hollow portion, and an accessory component coupled to the frame assembly by an accessory fastener positioned at least partially in the hollow portion of the motor fastener.

An e-bike includes a frame assembly, wheels supporting the frame assembly, a motor assembly coupled to the frame assembly by a motor fastener having a hollow portion, and an accessory component coupled to the frame assembly by an accessory fastener positioned at least partially in the hollow portion of the motor fastener.

The present invention is directed to aqueous compositions with wax and graphene. These compositions offer surprising benefits in reducing bicycle or motorbike chain lengthening, particularly in off road environments with high dirt and water levels such as during mountain biking or off-road biking. The invention is further directed to a method of preparing such compositions and to the use of such compositions on bicycle or motorbike chains.

The present invention is directed to aqueous compositions with wax and graphene. These compositions offer surprising benefits in reducing bicycle or motorbike chain lengthening, particularly in off road environments with high dirt and water levels such as during mountain biking or off-road biking. The invention is further directed to a method of preparing such compositions and to the use of such compositions on bicycle or motorbike chains.