Cane Creek's Forty Series is the workhorse of the range. Good quality very reliable and very reasonably priced. The Cane Creek top / upper headset assemblies feature: CNC Machined 6061 Alloy Cup Captured Aluminium Compression Ring Cane Creek Interlok Spacer compatible Black Oxide Steel Bearing. Top Cap Bolt and Star Fangled Nut are all included. Available options: EC34/28.6 is Cane Creek Part Number BAA0083K. Made for frames with a 34mm Inner Diameter and 1 1/8th Steerer Tubes. Technical Description EC34/28.6/H16/K Top Type EC - External Cup Top Head Tube Inside Dia. 33.95mm Stem Clamp Dia. 28.6mm Top Stack Height 16mm Top Bearing Type Black Oxide Sealed Material 6061 Weight 50g IS41/28.6 is Cane Creek Part Number BAA0081K. This is a drop fit or integrated headset top half. There is no cup the bearings simply 'drop' into the frame. For 1 1/8th Steerers. Technical Description IS41/28.6/H9/K Top Type IS - Integrated Top Head Tube Inside Dia. 41.1mm Stem Clamp Dia. 28.6mm Top Stack Height 9mm Top Bearing Type Black Oxide Sealed Material 6061 Weight 37g ZS49/28.6 is Cane Creek Part Number BAA0078K Technical Description ZS49/28.6/H8/K Top Type ZS - ZeroStack Top Head Tube Inside Dia. 49.61mm Stem Clamp Dia. 28.6mm Top Stack Height 8mm Top Bearing Type Black Oxide Sealed Material 6061 Weight 57g ZS44/28.6 is Cane Creek Part Number BAA0080K. It's designed to go into frames with a internal diameter of 44mm. And accepts 1 1/8th or Tapered Steerers. Technical Description ZS44/28.6/H8/K Top Type ZS - ZeroStack Top Head Tube Inside Dia. 44.00mm Stem Clamp Dia. 28.6mm Top Stack Height 8mm Top Bearing Type Black Oxide Sealed Material 6061 Weight 44g If you'd like more information on which headset you need c* We're Australia's #1 retailer of MTB parts, clothing and accessories! Orders ship next business day. Note orders may incur NZ customs duty or tax - see whatsmyduty.org.nz.