40-Series Zero Stack headsets set the standard for performance durability and value. Drawing from the premium 110-Series design the 40-Series includes all the features necessary for a durable lightweight long-lasting headset.

Sealed ZN40 cartridge bearings

6000 series alloy cups and materials

Steel crown race with integrated seals

Interlok spacer compatible

Color	Black
Lower Stack Height	12
Bearing Type	Cartridge
Crown Race	30
Weight	171
Defined Color	Black
Upper Stack Height	8
S.H.I.S Upper	ZS44
S.H.I.S. Stem Clamp Diameter	28.6 Threadless
S.H.I.S Lower	EC44