First Look: Shimano Brings Electronic Di2 Tech Down to Deore XT, Adds Wireless Connectivity and 11-46 Cassette Option - Mountain Bike Feature - Vital MTB
Shimano introduces 12 speed XT Di2 MTB... for ebikes only, includes new Free Shift & Auto Shift features - Bikerumor
Shimano GRX RD-RX815 Di2 – Incycle Bicycles
Mountain bike groupsets: everything you need to know - BikeRadar