Cane Creek 40 ZS44 EC49 Tapered Conversion Headset The 40-Series is the true workhorse line of Cane Creek's headsets. The 40-Series borrows design features from Cane Creek's premium 110-Series, incorporating all the features necessary for a durable, light-weight, long-lasting headset that represents the perfect balance of performance, durability and value. The Cane Creek 40 ZS44/EC49 Tapered Conversion headset fits bikes/frames with tapered (44/49) headtubes and straight 1-1/8" forks. Cane Creek Specifications Technical Description ZS44/28. 6/H8/K EC49/30 Top Type ZS - Zero Stack Top Head Tube Inside Dia. 44. 00mm Stem Clamp Dia. 28. 6mm Top Stack Height 8mm Top Bearing Type Black Oxide Bottom Type EC - External Cup Bottom Head Tube Inside Dia. 49. 61mm Crown Race Seat Dia. 39. 79mm Crown Race Type Steel, Face-Sealed Bottom Stack Height 12mm Bottom Bearing Type Black Oxide, Sealed Material 6061 alloy Weight 156g Manufacture Part Number BAA0739k Cane Creek Headset Finder To figure out which Cane Creek headset you need for your particular frame and fork, see Cane Creek's Headset Finder by clicking HERE. | Cane Creek | 40 Zs44 Ec49 Headset | Black | Zs44/28. 6/ec49/30