How much does the Apex mechanical system weigh? Apex XPLR drivetrain weighs 2872g.Apex mechanical with Eagle (Mullet style) drivetrain weighs 3062g. Related articles How much does the Apex AXS system weigh? What is the weight of the XPLR derailleur, cassette, and crankset? What is the MSRP for a full Apex mechanical groupset? Are oval 2x chainrings compatible with Rival eTap AXS cranksets? What are the main differences between RED eTap AXS and Force eTap AXS?