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Item # 790

/ Tools / Frame & Fork

55.9mm Pilot for 1-1/2" ZS Headset Standard

The 790 Pilot takes the place of the 789 Reamer for head tube facing with the HTR-1 Headtube Reamer. The 790 is used with the 690-XXL Facing Cutter and #750.2 Centering Cone Adaptor. The tool allows facing head tubes with 55.95 – 55.90mm I.D. (“Internal” 1-1/2” ZS standard).

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790 Features

SHIS terminology: The 790 is used on ZS56 or EC56 upper or lower headtubes.

Compatible Products


Head Tube Reaming and Facing Set


Head Tube Reaming and Facing Set


Reamer/Facer Handle Set