Park Tool
789 Reamer: 55.95mm

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Accessories and replacements parts for Park Tool head and steerer tube cutting tools.

Reams head tube I.D. to 55.95mm to accept "internal" headset cups with 55.99 - 56.04 O.D. (1-1/2" ZS standard)
Used with the 690-XXL Facing Cutter and 750 Centering Cone Adaptor
For upper and lower head tubes accepting the ZS56 or EC56 headsets

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