For extreme terrain, Apex controls and 1x cranksets can be paired with Eagle rear derailleurs: Apex AXS can be paired with Eagle AXS derailleurs and Apex mechanical shifters can be pared with Apex Eagle rear
derailleurs, Eagle 11-50T, 10-50T, or 10-52T cassette, and Eagle chain for a super wide 1x gearing.
The Apex XPLR AXS and Apex XPLR mechanical systems are a 1x 12-speed drivetrain that comes with a 44T max rear derailleur. The Apex XPLR AXS rear derailleur is designed specifically for 1x and will work with 11-44T, 10-44T, and 10-36T cassettes only. The Apex XPLR mechanical rear derailleur is compatible with 11-44T and 10-44T cassettes.
Apex offers a 1x Wide crankset with direct mount style chainrings in 38T, 40T, and 42T.