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IMPORTANT: READ BEFORE PURCHASE
This product is OE (Original Equipment) Packing. It is sold exactly as shown in the product image.
What is INCLUDED:
1x Upper Assembly: ZS44/28.6 (includes cup, sealed bearing, and top cover).
1x Lower Assembly: EC44/40 (includes external cup, sealed bearing, and crown race).
What is NOT INCLUDED:
Top Cap
Star Nut
Preload Bolt
Retail Box/Packaging
Key Features and Specs:
Material: The cups and covers are made from 6061 T-6 aluminum.
Bearings: It uses dependable, sealed, zinc-coated ZN40 bearings, which are corrosion-resistant.
Crown Race: The crown race is made of durable steel and is face-sealed for protection from contaminants.
SHIS (Standardized Headset Identification System) Specs:
Upper: ZS44/28.6 (ZeroStack). This means the upper head tube's inner diameter is 44mm, and the steerer clamp diameter is 28.6mm (1 1/8"). The top stack height is 8mm.
Lower: EC44/40 (External Cup). The lower head tube's inner diameter is 44mm, and the fork crown race seat diameter is 39.79mm. The bottom stack height is 12mm.
Compatibility: Designed for a 1 1/8" to 1 1/2" tapered steerer tube and frames with a 44mm headtube.
Weight: The total weight is around 171g. The top assembly weighs approximately 44g and the bottom assembly weighs around 76g.
Other details: The headset also features an innovative Clip-Seal that seals the top assembly and an Interlok® compatible design.
Upper Assembly (ZS44):
SHIS: ZS44/28.6/H8
Stack Height: 8mm
Bearing: Black Oxide, Sealed
Head-tube Inside Diameter: 44mm
Steerer Tube Diameter: 28.6mm (1-1/8")
Top Cover: Features an innovative Clip-Seal to protect the upper bearing from dirt and moisture.
Lower Assembly (EC44):
SHIS: EC44/40
Stack Height: 12mm
Bearing: Black Oxide, Sealed
Head-tube Inside Diameter: 44mm
Crown Race Diameter: 40mm (for a 1.5" tapered fork steerer tube)
Crown Race: Durable, steel, with a face seal.
Materials & Finish:
Cups & Covers: 6061-T6 Aluminum
Bearings: Dependable, zinc-coated ZN40 bearings
Finish: Black anodized with laser-etched graphics.
Compatibility:
Head Tube: Fits frames with a 44mm straight head tube that is compatible with a tapered steerer tube.
Fork: Designed for a 1 1/8" to 1 1/2" tapered steerer tube.
Please visit our website at http://www.ecomtb.com.my OR https://shopee.com.my/eco_mtb
** There is 1-3cm errors due to manual measurement. Please kindly understand.
** Actual product colour may slightly vary due to photographic lighting sources or your monitor settings.
** WE DO NOT DO COD
** ONLINE ONLY
** We support original products only.
** PRICE INDICATED IS ALREADY BEST PRICE, EXCLUDE COURIER
Last Updated @ 8/5/2026 12:29:11 PM
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