The FSA The Big Fat Pig headset features a 21mm headtube insertion and is constructed of aluminum/CrMo.
• EC49.57/38.1 (7/32x20) | EC49.57/39.78 (7/32x20)
• Forged chromoly cups
• 21mm headtube insertion
• Chromoly crown race
• Laser etched aluminum top cap
• Lower cup uses super durable 7/32" bearings
• Black anodized finish