Cane Creek 40 Series IS42 1 1/8" Headset The 40-Series is the workhorse line of Cane Creek's headsets. The 40-Series borrows design features from their 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. Cane Creek's 40-series IS (Integrated-System) assemblies feature cartridge bearings that slip into the cups and sit inside the headtube. The 40 IS42 headset fits bikes/frames with 1 1/8" Integrated-Angular Contact System headtubes, and Will NOT work with External Cup or Zero Stack frames. Technical Description: Tall - IS42/28. 6/H15/K IS42/30/H1 Short - IS42/28. 6/H9/K IS42/30/H1 Top Type: IS - Integrated Top Head Tube Inside Dia. : 42. 00mm Stem Clamp Dia. : 28. 6mm Top Stack Height: Tall - 15mm Short - 9mm Top Bearing Type: Black Oxide, Sealed Bottom Type: IS - Integrated Bottom Head Tube Inside Dia. : 42. 00mm Crown Race Seat Dia. : 30. 015mm Crown Race Type: Steel, Face-Sealed Bottom Stack Height: 1mm Bottom Bearing Type: Black Oxide, Sealed Material: 6061 Weight: Tall - 78g Short - 72g Part Number: Tall - BAA0093K Short - BAA0092K | Cane Creek | 40 Is42 1 1/8" Headset | Black | Is42, Short, 1 1/8'