D-SET 1 1/8" ZS44/49

• Made in Italy
• Expander-Plug Team allows for easy installation and play-adjustment
• 100% machined from light alloy
• Angular Contact Bearings ACB - Bolt: Gold-plated Titanium. Torx 25
• Sealed bearings and rubber lip seals for years of trouble-free performance

STANDARDISED FRAME AND FORK DIMENSION

• The S.H.I.S. code incorporates the four critical interface dimensions required to fit a fork to a frame, as well as explicitly noting bearing location/cup type
• The four needed dimension are:

1. Stem/clamp diameter of fork
2. Crown-race seat diameter of fork
3. Head-tube top inside diameter
4. Head-tube bottom inside diameter

Bearing position and cup type are identified as:

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

• The S.H.I.S. code is made of four alfanumeric series separated by / and |
• The symbol | separates the upper form the lower headset parts
• The symbol / separates the dimensions-type of the frame from the diameter of the fork steerer tube

For example the code ZS44/28,6 I ZS49/30 of this headset is separated in four parts:

1. ZS44 identifies the upper headset as a Zero Stack (bearing inside the frame) for a 44mm frame bore
2. 28,6 identifies the diameter of the fork tube at the stem clamp of 28,6mm that is 1 1/8"
3. ZS49 identifies the upper headset as a Zero Stack (bearing inside the frame) for a 49,6mm frame bore
4. 30 identifies the diameter of the fork tube at the crown of 30mm, that is 1 1/8"