Super-smooth steering, quality materials, cutting-edge design and serious durability are all hallmarks of Cane Creek's 40-Series headsets.

• Technical Description: ZS56/30/H4/K
• Bottom Type: ZS - ZeroStack
• Bottom Head Tube Inside Dia.: 55.95mm
• Crown Race Seat Dia.: 30.015mm
• Crown Race Type: Steel, Face-Sealed
• Bottom Stack Height: 4mm
• Bottom Bearing Type: Black Oxide, Sealed
• Material: 6061 aluminum
• Weight: 88g