A compression ring that is configured to be disposed between a bearing and a stem of a bicycle head parts assembly. A system configured according to this disclosure transmits a video communication over a network, detects the video quality degradation of the video communication, selects an appropriate counter-measure based at least in part on the particular type of degradation encountered, and implements the appropriate counter-measure. Zapping data may be provided to mobile terminals via a wireless multicast network, such as a DVB-H network, using timeslicing and providing the scalably encoded zapping data as part of the source stream. While in the compressed state, the braided sleeve body stores energy.