Apex/Apex35 Stem Fitting

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

Important - Follow all fitting instructions in order

Steerer tube preparation

  • The Renthal Apex stem requires a 28.6mm (1 1/8”) steerer tube (check prior to installation).
  • Ensure the steerer tube is the correct length – no more than a 3mm gap from the top of the stem to the top of the steerer tube (Fig. 1). If the steerer tube requires modifying to fit, ensure it is cut level.
  • Ensure all sharp edges and burrs are removed from the steerer tube and the external surface is both clean and dry.

Installation

  1. Remove all screws. Grease the threads and under the heads.
  2. Slide the stem onto the steerer, either way up depending on the rise spec required. Fit the top-cap and tighten the pre-load screw to the manufacturer’s specified torque.
  3. Place one of the gold handlebar clamps over the narrow section of your handlebar (Fig. 2) and slide to the centre, ensuring the ‘Lower Clamp – No Gap’ marking is at the underside of the bar and facing outwards. If your handlebar has a logo, use the gap in the clamp to avoid marking it. Repeat with the second clamp (Fig. 3).
  4. Hold the handlebar against the stem body and rotate the first clamp until the lower section contacts the stem (Fig. 4). Insert the screw and tighten until finger tight. Repeat with the second clamp.
  5. Insert the two upper handlebar clamp screws and thread in 3-4 turns.
  6. Tighten both lower clamp screws to 5Nm (Fig. 5).
  7. Centre the handlebar and set your required angle. Tighten the two upper handlebar clamp screws to 5Nm (Fig. 6).
  8. Insert the steerer clamp screws, align the stem and tighten to 5Nm (Fig. 7).