Hope EC34/28.6 - EC34/30 Standard Headset

Use: for 1 1/8" head tubes and standard 1 1/8" fork.

Specifications:

Application: Downhill, All Mountain, Enduro, Cross Country, Trail
Upper Cup: 1 1/8"
Lower Cup: 1 1/8"
Steerer Tube: 1 1/8"
Design: external cup (EC)

Technical Information

Material: aluminium (2014)
Bearings: cartridge bearings (sealed)
Upper Insert Depth: 10 mm
Lower Insert Depth: 10 mm
Upper Outer Diameter: 34.1 mm
Upper Inner Diameter: 28.6 mm
Lower Outer Diameter: 34.1 mm
Lower Inner Diameter: 30 mm

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

The Standardized Headset Identification System (S.H.I.S.) creates a common language for describing modern bicycle headsets. The system provides comprehensive and scalable headset fitment information in a standardized format; making it easy to communicate headset requirements based on frame and fork interfaces.
The system addresses the critical interface dimensions required to fit a fork to a frame, as well as bearing location/cup type. To determine fit, four dimensions are needed: (1) stem-clamp diameter of fork, (2) crown-race seat diameter of fork, (3) head-tube top inside diameter, and (4) head-tube bottom inside diameter. Bearing location and cup-type are identified as (a) external cup (EC), (b) semi-integrated or ZeroStack (ZS), or integrated (IS).

Nomenclature:

EC: Bearings contained within cups that are located outside of the frame (External Cup).
ZS: Bearings contained within pressed-in cups where the cup and bearings rest inside the frame (ZeroStack).
IS: Bearings that fit directly into a bonded or machined interface that is integrated into the frame (Integrated)

Manufacturer Part Number:

red: HSXR
blue: HSXB
orange: HSXC
purple: HSXPU
black: HSXN
silver: HSXS

Contents:

- 1 x Hope upper cup, stainless steel bearings
- 1 x Hope lower cup, stainless steel bearings
- 1 x Hope dust cap
- 1 x expander
- 1 x compression ring
- 1 x star nut