Upper Headtube ID: 44mm (semi integrated)Lower Headtube ID: 49.57mm (1.5")For 1.1/8" steerer
- 1.1/8" Upper to 1.5" bottom
- For differential OD headtube
- For tapered 50mm/61mm OD headtube
- For 1.5" sized headtube and 1.1/8" steerer
- Upper: forged alloy shallow cup with 36° × 45° ACB
- Lower: CNC machined alloy cup with 1.5", 36° × 45° ACB
- Stack height: 18.7 +2.4 = 21.1mm