The top half of Cane Creek's Hellbender 70 ViscoSet headset: an external-cup upper built around interleaved, fluorocarbon-coated damping plates that resist the high-frequency steering oscillation riders call speed wobble, sold on its own as an EC34/28.6 upper. Half the plates lock to the cup and half move with the steerer, so relative movement between them is damped rather than left to amplify.

How the damping works

The headset ships with a mid-range damping setting. Riders can run it with more or less damping by changing the orientation of the internal plates during a normal headset service — no proprietary tools needed.

Compatibility & fit

S.H.I.S. EC34/28.6: 13.5mm stack height, for 1-1/8in standard (non-tapered) head tubes running a 1-1/8in steerer. This EC34 top fitment suits traditional, non-integrated head tubes; Cane Creek also offers a ZS44/28.6 top for ZeroStack head tubes, both pairing with the same Hellbender 70 ViscoSet ZS56/40 bottom. If you're not sure which your frame needs, the Tune workshop can check and fit it.

Cane Creek's Hellbender 70 headsets carry a 2-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, 13.5mm stack height
  • Interleaved ViscoSet damping plates calm speed wobble
  • Field-adjustable damping, no special tools
  • 7075-T6 aluminium cup, sealed stainless steel Hellbender bearing
  • Mid-tune damping preset as shipped
S.H.I.S. (upper)EC34/28.6
Top typeExternal Cup (EC)
Stack height13.5mm
Bearing typeSealed stainless steel (Hellbender)
Material7075-T6 aluminium
Damping presetMid-tune, field-adjustable
FunctionViscoSet steering damping (anti speed-wobble)
SKU DTW-CKG-HST70VSEC34K
Barcode # 840226028101
Brand Cane Creek
Shipping Weight 0.1000kg