This is the top half only of a Cane Creek 40-Series headset: the ZeroStack cup, bearing and short 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 ZS44/28.6, meaning a ZeroStack (ZS) upper that presses fully into a 44.00mm head tube bore with no external shoulder, with a 28.6mm (1-1/8in) stem clamp, in the short (8mm stack) cover height. ZeroStack sits lower-profile than an External Cup (EC) top on the same size frame. 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. ZS44/28.6 top assembly, short cover: ZeroStack cup, sealed cartridge bearing and top cap
  • Black-oxide sealed bearing for corrosion resistance
  • 8mm stack height (short cover)
  • 6061 aluminium cup, 44g
S.H.I.S. (upper)ZS44/28.6
Top typeZeroStack (ZS), short cover
Head tube inside diameter44.00mm
Stem clamp diameter28.6mm
Stack height8mm
Bearing typeBlack-oxide, sealed cartridge
Material6061 aluminium
Weight44g
SKU DTW-CKG-HST40ZSS8K
Barcode # 840226094977
Brand Cane Creek
Shipping Weight 0.1000kg