How much does the Apex mechanical system weigh? Apex XPLR drivetrain weighs 2872g. Apex mechanical with Eagle (Adventure gravel bike) drivetrain weighs 3062g. Related articles How much does the Apex AXS system weigh? What are the weights of the XPLR derailleurs and cassettes? What is the MSRP for a full Apex mechanical groupset? What are the main differences between RED eTap AXS and Force eTap AXS? Are oval 2x chainrings compatible with Rival eTap AXS cranksets?