Syncros Headset ZS56/28.6-ZS56/40 Eride
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What this headset is
A semi-integrated (ZS) tapered headset made specifically for:
- Scott Sub eRide (MY22+)
- Scott Silence eRide (MY22+)
Developed with Acros, so the focus is on durability, sealing, and smooth steering—important for heavier e-bikes.
Key technical breakdown (simplified)
Fit & standard (SHIS explained)
- ZS56/28.6 (top)
- ZS56/40 (bottom)
Meaning:
- Frame takes 56mm press-fit cups (top & bottom)
- Fork must be tapered:
- Top: 1 1/8" steerer (28.6mm)
- Bottom: 1.5" crown race (40mm)
This is a modern e-bike / MTB standard
Construction & materials
-
Stainless steel bearings
→ Better corrosion resistance (great for wet commuting) -
Double-sealed industrial bearings
→ Keeps dirt and water out
→ Longer lifespan, less maintenance -
Alloy + plastic components
→ Strong + lightweight balance -
Weight: ~132g
→ Reasonably light for a durable e-bike headset
Design details
-
Semi-integrated (ZS)
→ Bearings sit inside the frame
→ Cleaner look than external headsets -
Integrated cable routing
→ Internal guides for cables/hoses
→ Cleaner cockpit + added protection
Dimensions (important for fit)
- Press-in diameter: 56mm (actual ~55mm tolerance fit)
- Outer diameter (cups): 61mm
-
Stack height:
- Top: 2mm (without spacers)
- Bottom: 2mm
- Offset (top & bottom): 9mm
These confirm it’s a low-stack, flush-fitting headset
Real-world performance
What this means when riding:
-
Very smooth steering
(thanks to high-quality sealed bearings) -
Long service life
(stainless steel + strong sealing = less wear) -
Good for harsh conditions
(rain, dust, commuting abuse) -
Clean cockpit
(internal cable routing support)
Compatibility checklist
This WILL fit if:
- Your frame = ZS56 top + bottom
- Your bike = Scott Sub/Silence eRide MY22+
- Your fork = tapered (1 1/8" → 1.5")
This will NOT fit if:
- Different headset standard (ZS44, IS, EC, etc.)
- Straight steerer fork
- Older/non-eRide Scott frames (most cases)
Bottom line
This headset is best described as:
High-quality OEM replacement with premium bearings
- ✔️ Excellent sealing & durability
- ✔️ Designed for heavier e-bikes
- ✔️ Clean internal cable routing
- ❌ Not a universal upgrade part
