The 10 series has the look and feel of Cane Creek's class leading 40 Series headsets with simpler machining and more economical materials. Designed with the upgrade path in mind, the 10-Series shares the internal geometry of Cane Creek's higher-end headsets and, as a result, replacement and upgrade parts are readily available.Machined from 6061 T-6 aluminiumSealed, lightweight polymer crown raceLightweight polymer compression ringInterlok spacer compatibleInternal parts are cross -compatible across the 10, 40 and 110-seriesExternal upper cup for 1'1/8" headtube