AXIS A2 Double Pedal (AX-A2) The A2 is the double version of the AXIS A. The new and improved drive shaft linkage was specifically designed to maintain the all ball bearing action which sets the AXIS double pedals apart from anything else in the industry. The universal joints feature a -zero backlash- design which transfers the power from the slave side to the primary side with the maximum transfer of torque, rebound and sensitivity.