Gravity DX Pro Tapered Headset (Upper: 44mm I.D. Lower: 49.57mm I.D, Steerer Tube: 1-1/8-1.5-Inch Tapered) Bearing Type: Angular ContactCrown Race: 39.7Headset Detail Color: BlackHeadset Size: 1 1/8" to 1.5" TaperedHeadset Size: 1.5"Headset Type: Internal Upper 44mm 36/45, Standard 1.5" Lower CupMaterial: AluminumStack: 23.3mmStack Height: 23.3mmSteer Tube Size: 1.5 external&gt;1-1/8 internal (1.5&gt;1-1/8 fork)Weight: 141gWeight: 142g