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
• Compatible with straight 1-1/8" steerer tubes, or tapered 1-1/8" to 1-1/2" steerer tubes with a 40mm crown race (sold separately)