Why does the XPLR derailleur only work as a 1x? August 09, 2021 21:52 Updated Due to an offset upper pulley, the XPLR rear derailleur will only work with a single front chainring. Related articles Can I make the XPLR rear derailleur work with a 2x system? What’s the difference between XPLR eTap AXS rear derailleurs, eTap AXS wider gearing derailleurs, and eTap AXS derailleurs? Does the XPLR rear derailleur have chain management? What type of brake pads are required for SRAM eTap AXS HRD road disc brakes? What do I need to do to convert to XPLR gearing if I already have an eTap AXS drivetrain? Comments 0 comments Article is closed for comments.