Trek SC Super-X Plate Installation Guide

⚠️ This plate is designed specifically to work on the Trek Speed Concept Twin Post (disc brake) TT bike.

1. Prepare the Basebar

  • Start with a naked Trek Speed Concept basebar with only the risers installed.

  • Remove all other hardware (arm cups, plates, brackets, etc.).

  • Verify that the risers are properly seated but do not remove them.

2. Position the Super-X Plate

  • The Super-X plate installs directly on top of the risers.

  • Gently bring the plate into position over the risers.

  • The plate features locating holes designed to help align it with the risers.

  • (The plate also has cable ports to help guide electronic wiring).

3. Align the Plate

  • Align one side of the plate first, engaging the locating holes with the riser.

  • Once the first side is seated, align the opposite side.

  • Do not force the plate into position, it should click into place.

If alignment is difficult:

  • Slightly loosen the riser bolt from the underside of the bar.

  • This will allow enough movement for the plate to snap cleanly into place.

  • Repeat as needed on the opposite side.

(Gentling wigging the plate into place).

4. Install Countersunk Bolts

  • Once both sides of the plate are properly aligned and seated:

    • Install the 4 countersunk bolts through the Super-X plate.

  • Thread all bolts in by hand before tightening.

5. Final Tightening

  • Tighten the countersunk bolts evenly, alternating between bolts to seat the plate flat.

  • Re-tighten all riser bolts from the underside of the bar to ensure the risers are fully secured.

Final Checks

  • Confirm the plate is fully seated on both risers.

  • Verify all countersunk bolts are tight.

  • Confirm all riser bolts are tightened and secure.

  • Ensure there is no play or misalignment in the assembly.

OPTIONAL: 

  • Can use the Alpha Prime extension clamps bolted underneath the plate.