The 790 centers the HTR-1 Head Tube Reaming and Facing Set when the head tube is being faced but not reamed. Used in conjunction with the Park Tool HTR-1 Head Tube Reaming and Facing Set and 690-XL Facing Cutter. Sized for head tubes that use the 1.5" internal cup headset standard.

• Sized for 1.5" internal cup headsets
• SHIS: sized for ZS56 and EC56 head tubes
• 55.9 mm outer diameter
• Requires use of the 750.2 Centering Cone Adapte

NOTE: Always use cutting fluid such as Park Tool CF-2 when machining.