Park Tool 769 Head Tube Reamer Extension

For use with the HTR-1 Head Tube Reaming and Facing Set, the #769 extends the reaming depth of reamers used in 1", 1-1/8" and 1-1/4" headset standards down to 27mm from the head tube face. Designed for head tubes using headsets with deep insertion cups (Chris King® SteelSet headsets and others).

SHIS terminology: The 769 is used for EC34, EC30, or EC37 lower and upper headtubes.

  • 27mm reaming depth
  • Designed for head tubes using headsets with deep insertion cups

Note: Always use cutting fluid such as Park Tool CF-1 when machining