Headset standard: 1-1/8" Integrated IS top/bottom
Bearing shell dimension: none
Ø head tube top: 41.10 - 41.20 mm I.D. 3.10 - 3.20 mm deep
Ø head tube bottom: 41.10 - 41.20 mm I.D. 6.90 - 7.00 mm deep
Tools internal and face milling: HTR-1 / 1B, 756S, 750.2