Completely silent XT rearHUB? SCYLENCE tech by SHIMANO - YouTube
Shimano Scylence information | Mountain Bike Reviews Forum
Shimano patent shows silent ring drive hub internals that could be the next Dura-Ace - Bikerumor
XTR M9100 The Sound Of SCYLENCE SHIMANO - YouTube
XTR M9100 SCYLENCE Hub | Listen, can you hear the sound of your hub ticking? Not when you're on the new XTR. We made it nearly silent with our SCYLENCE technology so