Item # 788/ Tools / Frame & Fork
Reams head tube I.D. to 43.95mm to accept “internal” headset cups with 44.05 - 44.10mm O.D. (1-1/8 ZS standard). Used with #690-XL Facing Cutter and #750 Centering Cone.
SHIS terminology: the 788 is used for upper or lower headtubes that accept the ZS44 or EC44 headsets.