Facing improves the alignment of bearings in the headset, giving a better fit for improved strength and durability.
The 690-XXL has an approximate diameter of 65 mm and is a larger version of the 690 and 690-XL facers for facing 1.5 inch head tubes with low profile Zero Stack type headsets.
Must be used with the 55.9 mm 790 pilot to ensure the frame is reamed and faced accurately.








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