Part 2. Shimano MTB Groupset Overview. Altus vs Acera. Buyers Guide / Review. - YouTube
Four Months of Riding Shimano's 12-Speed Deore M6100: “the People's Champ” – John Watson | The Radavist | A group of individuals who share a love of cycling and the outdoors.
Your complete guide to Shimano mountain bike drivetrains - Tourney, Altus, Acera, Alivio, Deore, SLX, XT, XTR 12 speed | off-road.cc