Steve Potts Cycles Adventure HC Headset ZS44/EC44 Hybrid Ceramic Bearings
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Sealed cartridge bearing headset for bicycles with 44mm ID head tubes running 1-1/8" to 1-1/2" tapered steerer fork. Upper cup is ZS (Zero Stack semi-integrated) Lower cup is EC (external cup).
Hybrid ceramic bearings for longer bearing life and offers "self-cleaning" properties by grinding down dirt particles that happen to enter the bearing seals.
Cups: 6061-T6 aluminum
Upper Stack: 6.5mm
Lower Stack: 13.6mm
Bearings: Precision sealed cartridge bearing with both steel and ceramic balls