99spokes - Search and compare bikes.
BikeCad - Bicycle design software.
Sheldon Brown - maintenance and more.
Berm Peak - MTB, trails. [Youtube]
Berm Peak Express - trails and mostly biking related stuff. [Youtube]
Gran Fondo - Cycling magazine.
E-mountainbike - E-mountainbike magazine.
EMTB.no - eMTB (partly norwegian content, but videos in english)
SYD and MACKY - riding mountain bikes.
Syd Fixes Bikes - bike maintenance.
Berm Peak - riding bikes and builing paths.
Cycling Weekly - bike reviews and tips.
Alex Dowsett - vlogging about riding bikes.
GMBN Tech - mountain bikes maintenance and new tech.
Two Wheel Cruise - cycling in Japan.
Long Tiny Loop - traverse the longest possible non-self-intersecting loop within the smallest possible region.