Cane Creek 40 ZS44 1 1/8 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 1 1/8 headset fits bikes/frames with straight 1-1/8" headtubes and forks that are compatible with Zero Stack headsets, and Will NOT work with frames that that have tapered headtube. Technical Description: ZS44/28. 6/H8/K ZS44/30/H4/K 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, Sealed Bottom Type: ZS - Zero Stack Bottom Head Tube Inside Dia. : 44. 00mm Crown Race Seat Dia. : 30. 015mm Crown Race Type: Steel, Face-Sealed Bottom Stack Height: 4mm Bottom Bearing Type: Black Oxide, Sealed Material: 6061 Weight: 88g Part Number: BAA0075K | Cane Creek | 40 Zs44 1 1/8 Short Headset | Black | Zs44, 1 1/8, Short