Full speed ahead Orbit IS Upper SHIS IS41.2/28.6| Black 52.5g 28.6 41.2 30 36/45 1-1/8`

FSAs flagship headsets in separate upper and lower headset cup assemblies FSA Integrated 41.2mm ID (36x45), Campy Hiddenset 42.0mm ID (45x45) , ZS (ZeroStack), or EC (traditional External Cup) available for 1-1/8 inch and tapered steerers For clarification