installation instructions pdf rebuild instructions pdf installing acid pedals installing rebuild kit cleat set-up acid pedals maintenance Pedal installation Acid pedals have a 6mm hex on the end of the spindles. For identification, left pedal has a small groove around the spindle flange. Important: The right spindle has right-handed threads, and the left spindle has left-handed threads. Grease the spindle threads and then tighten the pedals to 25 to 30 foot pounds torque (34 to 41Nm) with a 6mm hex.