Specialized Demo Headset ZS49 1-1/8 OEM Replacement
Specialized Demo Headset ZS49 1-1/8 OEM Replacement
Stage 21 Bikes
23582 Moulton Parkway
#111
Laguna Woods CA 92637
United States
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Specialized Factory Replacement Headset for Demo
Complete ZS49 Headset Assembly | 1-1/8" Steerer
The Specialized Factory Replacement Demo Headset is a genuine OEM complete headset assembly designed specifically for Specialized Demo frames utilizing a 49.65mm non-tapered headtube and 1-1/8" straight steerer fork. Featuring Zero Stack (ZS49) press-fit cups, precision angular contact bearings, and all required installation components, this headset restores factory fit, performance, and steering precision.
Built to keep your Demo race-ready.
Genuine Specialized OEM Replacement
- Complete factory replacement headset assembly
- Designed specifically for compatible Specialized Demo frames
- Restores original fit, steering performance, and durability
Complete Headset Kit
Includes:
✔ Upper ZS49 press-fit cup
✔ Lower ZS49 press-fit cup
✔ Upper bearing
✔ Lower bearing
✔ Alloy top cover
✔ Compression ring
✔ Crown race
Zero Stack (ZS49) Design
- Press-fit Zero Stack headset system
- Designed for frames with 49.65mm internal diameter headtube
- Maintains proper bearing alignment and frame compatibility
Precision Angular Contact Bearings
Upper & Lower Bearings:
- 41mm OD
- 30.15mm ID
- 6.5mm thickness
- 45° x 45° angular contact design
Provides smooth steering performance and durability under aggressive riding conditions.
Straight 1-1/8" Fork Compatibility
Compatible with:
- Non-tapered 1-1/8" steerer tubes
- 30mm crown race seat diameter
Specifications
- Brand: Specialized
- Product: Demo Complete Headset
- Headset Type: Zero Stack (ZS49)
- Cup Outside Diameter: 49.65mm
- Cup Depth: 15mm
- Steerer Compatibility: Straight 1-1/8"
- Top Cover: 46mm OD x 4mm height alloy
- Compression Ring: Split alloy, 6mm height
- Crown Race: Split alloy, 30mm ID
- Bearing Size: 41mm OD x 30.15mm ID x 6.5mm
- Bearing Angle: 45° x 45°
- MPN: S212500008
OEM Model Compatibility
Compatible with:
2025
- Demo Race Frameset
- Demo Race
2024
- Demo Race Frameset
- Demo Race
2023
- Demo Race Frameset
- Demo Race
- Demo Expert
2022
- Demo Race Frameset
- Demo Race
- Demo Expert
2021
- Demo Race Frameset
- Demo Race
- Demo Expert
2020
- Demo Race 29 Frame
- Demo Race 29
- Demo Expert 29
2019
- Demo Race 29 Frame
- Demo Race 29
- Demo Expert 29
Ideal For
✔ Demo frame headset replacement
✔ Downhill bike maintenance
✔ Restoring steering precision
✔ Bearing and headset service repairs
Why Choose Genuine Specialized Headsets?
• Exact OEM fit and compatibility
• Complete replacement solution
• High-quality angular contact bearings
• Smooth steering performance
• Designed specifically for Specialized Demo frames
The Specialized Factory Replacement Demo Headset provides the exact OEM solution for maintaining smooth steering, reliable bearing performance, and factory-correct fit on compatible Specialized Demo downhill bikes.