Cane Creek Forty Series Headset Bottom Assembly

Cane Creek's workhorse headset! The Forty Series is a quality product at a mid-range price point.

All of the Headset cups are machined from 6061 T-6 Alloy and utilise black-oxide sealed bearings. The crown races are made from treated steel and feature a single, low friction sealing lip to keep debris out. All of the parts from the Forty series headsets are cross-compatible with Cane Creek's 10 and 110 series headsets.

Want to run a fork with a tapered steerer on your frame with a straight 1 1/8" head tube? - Check out the EC44/40 lower headset cup below.

Available options:

EC49/40: Cane Creek Part Number BAA0091K. Made for frames with a 49mm Inner Diameter and 1.5 Inch or Tapered Steerer Tubes.

• Technical Description EC49/40/H12/K
• 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
• Weight 76g

ZS56/40: Cane Creek Part Number BAA0090K. Made for frames with a 56mm Inner Diameter and 1.5 Inch or Tapered Steerer Tubes.

• Technical Description ZS56/40/H4/K
• Bottom Type ZS - ZeroStack
• Bottom Head Tube Inside Dia. 55.95mm
• Crown Race Seat Dia. 39.79mm
• Crown Race Type Steel, Face-Sealed
• Bottom Stack Height 4mm
• Bottom Bearing Type Black Oxide, Sealed
• Material 6061
• Weight 65g
• Part Number BAA0090K

IS52/40: Cane Creek Part Number BAA0086. Made for frames where the bottom bearing sits directly into the frame without a bottom cup and 1.5 Inch or Tapered Steerer Tubes.

• Technical Description IS52/40/H1
• Bottom Type IS - Integrated
• Bottom Head Tube Inside Dia. 52.1mm
• Crown Race Seat Dia. 39.79mm
• Crown Race Type Steel, Face-Sealed
• Bottom Stack Height 1mm
• Bottom Bearing Type Black Oxide, Sealed
• Material N/A
• Weight 50g

ZS55/40: Cane Creek Part Number BAA0737K. Made for frames with a 55mm Inner Diameter and 1.5 Inch or Tapered Steerer Tubes.

• Technical Description ZS55/40/H4/K
• Bottom Type ZS - ZeroStack
• Bottom Head Tube Inside Dia. 54.95mm
• Crown Race Seat Dia. 39.79mm
• Crown Race Type Steel, Face-Sealed
• Bottom Stack Height 4mm
• Bottom Bearing Type Black Oxide, Sealed
• Material 6061
• Weight 65g

EC44/40: Cane Creek Part Number BAA0085K. Made for frames with a 44mm Inner Diameter and 1.5 Inch or Tapered Steerer Tubes.

Allows for a tapered steerer fork to be used on a frame with a straight 1 1/8" headset.

• Technical Description EC44/40/H12/K
• Bottom Type EC - External Cup
• Bottom Head Tube Inside Dia. 44.00mm
• Crown Race Seat Dia. 39.79mm
• Crown Race Type Steel, Face-Sealed
• Bottom Stack Height 12mm
• Bottom Bearing Type Black Oxide, Sealed
• Material 6061
• Weight 65g