Headset standard: 1-1/8" Conventional
Ø Bearing shell: 34.05 - 34.15 A.D.
Ø Head tube: 33.90 - 33.95 I.D.
Tools internal and face milling: HTR-1 / 1B, 754.2, 690
Face milling tools only: HTR-1 / 1B, 765, 690
#754.2 included with HTR-1B
#765 included with HTR-1 / 1B