Wolf Tooth Components
Mark Zero Upper Headset - IS41/28.6mm

MARKZERO

MK0 items represent a refined approach to component engineering. All items are made in small batches and feature premium raw materials, labor-intensive CNC machining, and a new design language. The result is components with a refreshed aesthetic and increased performance gains.

Features:

• Slammed
  Only 4mm of stack. The extra machining and new profile of the MK0 headsets have meaningful gains. Compared to the non-MK0 design, these have a 44% reduction in aluminum weight without compromising strength and durability.
• A New Profile
  MK0 headsets feature a new design language and an exclusive color. For this new aesthetic, each top cap spends 4x more time in our CNC lathe, before undergoing thorough QC inspection, anodizing in the new Shadow Gray color, and branding before it can be installed in a head tube.

Compatibility:

• Any frame that uses IS (Integrated Standard) headsets with 41mm upper and 52mm lower outer bearing diameter
• Uppers and lowers sold separately 
• Enduro stainless steel sealed bearings included on both the upper and lower
• IS42 is not compatible with Specialized mountain bikes or bikes using the Campagnolo Hiddenset standard
• Upper headsets ship with a star nut which can only be used on forks with steel or aluminum steerer tubes. For forks with carbon steerer tubes you will need a compression plug (sold separately). (Never use a star nut on a carbon steerer tube)

Specification:

Weight: 29 g  
Material: 6061 aluminum
Bevel Angle: 36 x 45 degrees
Stem Cap Bolt Torque Spec: 2-3 Nm MAX with light grease on threads only. Use a torque wrench.