The Campagnolo Chorus Hiddenset is an internal headset requires a frame with headtube designed for an internal headset. Hiddenset internal headset, requires head tube designed for internal headset TTC Tall Top Cap top bearing cap is 10mm taller to reduce the need for spacers additional spacers can be added 42mm head tube I.D. Includes top cap assembly Steerer Tube 118 Threadless Headset Type Integrated, 42.0mm OD bearing 4545 Hiddenset Color Black Crow
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