The bottom half of a Cane Creek 40-Series headset, built as a ZeroStack reducer: S.H.I.S. ZS49/30, adapting a 1.5in head tube down to a 1-1/8in steerer. Sold as the lower assembly only.

Compatibility & fit

S.H.I.S. ZS49/30: 49.61mm head tube inside diameter, 30.015mm crown race seat, 4mm stack height. For a 1.5in head tube that needs to run a 1-1/8in fork steerer rather than the native 1.5in or tapered standard. Match the S.H.I.S. code to both your frame and your fork steerer before ordering. The Tune workshop can confirm your frame's standard 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. ZS49/30 ZeroStack reducer lower assembly
  • Black-oxide, sealed cartridge bearing
  • Steel, face-sealed crown race
  • 6061 aluminium cup, 58g
S.H.I.S. (lower)ZS49/30
Bottom typeZeroStack (ZS) reducer
Head tube inside diameter49.61mm
Crown race seat diameter30.015mm
Crown race typeSteel, face-sealed
Stack height4mm
Bearing typeBlack-oxide, sealed cartridge
Material6061 aluminium
Weight58g
SKU DTW-CKG-HSCB40ZS49K
Barcode # 840226094991
Brand Cane Creek
Shipping Weight 0.1580kg

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