Ritchey comp headset lowers drop indrop in headsets with full complement angular contact cartridge bearings alloy bearing cover and cap integrated system threadless headset for campagnolo hiddenset compatible frames with 41 8mm headtube id features comp alloy top bearing cover and compression top cap sealed cartridge bearings 4545 degree angular contact bearings 418mm buyritchey componentsfrom chain reaction cycles the worlds largest online bike store