This is the top half only of a Cane Creek 40-Series headset: the external cup, bearing and top cap, sold separately for building up or servicing a headset rather than as a complete set.

Compatibility & fit

S.H.I.S. (the Standardized Headset Identification System) is the code the whole headset industry uses for cup and crown race sizes, written upper | lower — this top assembly is EC34/28.6, meaning an External Cup upper with a 34mm head tube bore (33.95mm measured) and a 28.6mm (1-1/8in) stem clamp, 16mm stack height. External Cup headsets sit the bearing in a cup that presses into a standard (non-tapered, non-integrated) 1-1/8in head tube, with the cup visible above the frame. Match it to your frame and stem by that S.H.I.S. code, not by looks. If you're not sure which headset standard your frame uses, the Tune workshop can check and fit it.

Cane Creek's 40-Series (Forty) headsets carry a 1-year warranty to the original owner against defects in materials and workmanship. For warranty support, return the product to Tune Cycles and we'll manage the claim with Cane Creek's Australian distributor. This is in addition to your rights under the Australian Consumer Law, so keep your proof of purchase.
  • S.H.I.S. EC34/28.6 top assembly: external cup, sealed cartridge bearing and top cap
  • Black-oxide sealed bearing for corrosion resistance
  • Clip-Seal top cover captures the compression ring
  • 16mm stack height
  • 6061 aluminium cup, 50g
S.H.I.S. (upper)EC34/28.6
Top typeExternal Cup (EC)
Head tube inside diameter33.95mm
Stem clamp diameter28.6mm
Stack height16mm
Bearing typeBlack-oxide, sealed cartridge
Material6061 aluminium
Weight50g
SKU DTW-CKG-HST40EC34K
Barcode # 840226094786
Brand Cane Creek
Shipping Weight 0.1500kg