HEADSET TYPE: Threadless Zero Stack Cup
STEERER TUBE: Tapered 11/8" to 1.5"
MATERIAL: Alloy
STACK HEIGHT: 12.8mm
UPPER CUP: 44mm Flush Cup
LOWER CUP: 56mm Flush Cup
UPPER BEARING: 36° x 45° 11/8" ACB Sealed Bearing 41.0mm OD
LOWER BEARING: 36° x 45° 1.5" ACB Sealed Bearing 51.8mm OD

• For tapered steerers(can be converted to 1 1/8 steerer through purchase of a FS160-5538 crown race)
• FSA Part Number 121-0501