Cane Creek 40 ZS49/28.6 /ZS49/30 Conversion Headset BlackCane Creek 40 Series. The 40 Series is the workhorse of Cane Creek's headset line up. Representing the balance of performance, durability and value, the series incorporates all the features necessary for a robust, lightweight, long lasting headset. Replaces Cane Creek XXc Flush and XXcII Flush headsets Zero Stack (ZS) assemblies feature press in cups with bearings inside the frame Item Specifications Color Black Weight 115g Material AL 6061 Crown Race