Whilst this may appear a minor item it actually has quite a significant effect in use.
The split in the compression ring actually allows the ring to grab the fork steerer as the ring is compressed by the headset bearing adjustments.
The grabbing prevents any possibility of knocking from play between the fork and the headset. Many other so called Ahead type headsets do not have this patented feature even though, at first glance they appear to offer much the same performance.
IB-1 headset features;
Campagnolo system compatible.
Integrated style bearings fit directly into headtube
CNC alloy top cover.
Dia-Compe Styrlager, IB-1 Drop In Lager, 41.8
Lagerstatus: I lager
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