ASSEMBLY INSTRUCTIONS9STEP 5Insert the PEDAL SHAFT(5) through the tube located on the UPRIGHT(3). Slide the PEDAL CAPS(4)onto both ends of the PEDAL SHAFT(5) and secure with BUTTON HEAD BOLTS(M8x1.25x15mm)(14)and LARGE WASHERS(M8)(15). You need to use two Allen Wrenches to tighten the BUTTON HEADBOLTS(M8x1.25x15mm)(14) at both ends of the PEDAL SHAFT(5) at the same time.