The FSA Orbit Z headets feature a very low-profile design primarily for ATB and are compatible with Cane Creek internal style headsets.
2010 Print catalog error: HD4647 is the part number listed for two different headsets. HD4647 is FSA Orbit Z 1-1/8" Internal Threadless Headset, Black The other headset listed as HD4647 is part number HD4557
7075 alloy crown race
Very low profile designed primarily for Mountain Bikes
Patented alignment tip for increased durability and performance