Duo Stem Fitting

Equipment required – Torque Wrench, 4mm Hex Socket Bit, Waterproof Grease.

Important - Follow all fitting instructions in order

Steerer tube preparation

  • 1. The DUO™ Stem is designed to work only with 28.6mm (1 1/8") steerer tubes (check prior to installation).
  • 2. Ensure the steerer tube is set to the correct length - leave no more than a 3mm gap from the top of the stem to the top surface of the steerer tube (if the steerer tube requires modifying to fit, ensure it is cut level).
  • 3. Ensure all sharp edges and burrs are removed from the top of the steerer tube (both inside and out).
  • 4. Ensure that the steerer tube and stem are both clean and dry.

Installation

  1. Remove all bolts, apply grease to the threads and under the heads of the bolts.
  2. Place the handlebar in the stem (in the correct orientation) and loosely assemble the two central SILVER bolts. (Fig. 1).
  3. Slide the stem onto the steerer tube until it contacts the headset spacer(s) and then tighten the two central SILVER bolts to 5Nm.
  4. Install the top cap onto the top of the stem, then tighten to the manufacturer’s specification.
  5. Align the handlebar with the front wheel and install two BLACK bolts into the rear of the stem. Alternating between the two bolts, progressively tighten to 5Nm, to ensure even clamping. (Fig. 2).
  6. Install the remaining two BLACK bolts into the front of the stem, align the handlebar to the desired position, and alternating between the two, progressively tighten to 5Nm, to ensure even clamping. (Fig. 3).