KCNC Omega S3 IS42/28.6 - IS42/30 Headset

Use:

For 1 1/8" upper and lower head tubes combined with standard 1 1/8" forks.

Top Bearing:

1 1/8" dimension

Bottom Bearing:

1 1/8" dimension

Steerer Tube:

1 1/8"

Design:

integrated (IS)

Technical Information:

Bearings:

cartridge

Steerer Tube:

1 1/8"

Top Cup Material:

stainless steel

Bottom Cup Material:

stainless steel

Top Outer Ring Diameter:

42 mm

Bottom Outer Ring Diameter:

42 mm

Standardized Headset Identification System (S.H.I.S.):

In order to clarify and bring uniformity to a sea of headset standards, manufacturers Acros, Cane Creek, Hope, Race Face, Reset Racing and Ritchey have agreed upon using a shared nomenclature, which will likely include more participating companies in the future. This system takes into account a combination of frame and fork dimensions. Both the top and bottom parts of the headset are marked by two alphanumeric identifiers. The first identifier indicates the type of headset (External Cup, Zero Stack, Integrated) and head tube diameter. The second identifier - separated from the first by a backslash - indicates the diameter of the steerer tube. When referring to a complete headset, the specifications of both top and bottom parts must be combined.

Nomenclature:

EC:

Bearings contained within headset cups that are located outside of the frame (External Cup)

ZS:

Bearings contained within pressed-in headset cups where the cup and bearings rest inside the frame (Zero Stack)

IS:

Bearings that fit directly into a bonded or machined interface that is integrated into the frame (Integrated)

Models:

IS42/28.6

• Design: integrated (IS)
• Application: top
• Steerer Tube: 28.6 mm
• Head Tube (Frame Inner Diameter): 42 mm
• Stack Height: 18 mm

IS42/30

• Design: integrated (IS)
• Application: bottom
• Steerer Tube Crown Race: 30 mm
• Head Tube (Frame Inner Diameter): 42 mm
• Stack Height: 1 mm

Contents:

• 1 x KCNC top cartridge bearing
• 1 x KCNC bottom cartridge bearing
• 1 x KCNC headset cap
• 1 x KCNC top cap
• 1 x star nut with bolt
• 1 x crown race