Specialized Tarmac SL8 Custom Headset Spacer | 3D-Printed Adapter for Integrated Cockpit Systems
💎 $400–$1000 Orders — 12% OFF
🌟 $1000+ Orders — 15% OFF
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Choose a NIUJU headset spacer for a Specialized Tarmac SL8 conversion to a compatible integrated handlebar or stem. The 3D-printed PA parts are available in model-specific designs and custom stack heights.
Model and SKU selection (SKUs)
| SKU | Description | Handlebar / System |
|---|---|---|
| DQ-S0001 | Upper Spacer Adapter | Black Inc Aero Integrated Handlebar |
| DQ-S0002 | Upper Spacer Adapter | Shimano Pro Vibe EVO |
| DQ-S0003 | Upper Spacer Adapter | BIGROCK V2 |
| DQ-S0004 | Upper Spacer Adapter | The One Pro |
| DQ-S0005 | Upper Spacer Adapter | Farsport F1 / F1S |
| DQ-S0006 | Upper Spacer Adapter | EXS Aerover |
| DQ-S0007 | Upper Spacer Adapter | SEKA Exceed |
| DQ-S0009 | Upper Spacer Adapter | Trek Madone (Y28) |
| DQ-S0010 | Upper Spacer Adapter | Roval Rapide (2nd Gen) |
| DQ-S0031 | Headset Base | EXS Aerover (STS Mount Type) |
| DQ-S0032 | Headset Base (1 cm Low Stack) | EXS Aerover STS Install |
| DQ-S0033 | Headset Base | DEDA Superbox / Colnago CC.01 |
| DQ-S0034 | Headset Base | The One Pro / BIGROCK V1 & V2 / RPANTAHI |
| DQ-S0035 | Headset Base | Farsport F1 / F1S |
| DQ-S0036 | Headset Base | FSA / Vision System |
| DQ-S0037 | Headset Base | Cannondale MOMO |
| DQ-S0050 | Headset Base | Roval Rapide |
| DQ-S0051 | Height Extension Spacer (1 cm) | Compatible with OEM Cockpit |
| DQ-S0052 | Full Spacer Set (48 mm) | SL8 to SL7 Stem Adapter |
Additional custom models in progress
SL8 → THM Full Internal Handlebar Adapter
SL8 → Shimano SL Stem 1 cm Adapter
SL8 → Cadex Aero Adapter
SL8 → SEKA Rapier Adapter
SL8 → Quick SSL Integrated Base
SL8 → ENVE Internal Headset Base
Construction, purpose and ride benefits
Supports STS full internal cable routing and custom stack heights (starting from 10 mm).
Works with multiple handlebar systems including Black Inc, Shimano Pro Vibe EVO, Roval Rapide, EXS Aerover, SEKA Exceed, The One Pro, BIGROCK, Farsport, FSA/Vision, MOMO, THM, Cadex Aero, Quick SSL, ENVE, and more.
The NIUJU Custom Headset Spacer Series is engineered exclusively for the Specialized Tarmac SL8, offering precision-fit solutions for a wide range of integrated cockpit systems.
Each spacer is 3D-printed from PA material, ensuring strength, lightweight performance, and perfect alignment with the original SL8 headset structure.
Technical specifications
Material: PA (3D-Printed Industrial Nylon)
Fit: Specialized Tarmac SL8 Headset
Routing: STS Full Internal Compatible
Default Height: 10 mm (Adjustable)
Weight: Ultra-light structure — precision fit
Color: Matte Black / Customizable
Why Choose NIUJU
NIUJU specializes in custom-fit headset solutions for aero road bikes.
Each component is precision-scanned from the original frame and cockpit for millimeter-level accuracy, ensuring a clean integration with factory-style aesthetics and flawless cable management.
Design advantages
🔩 Precision fit for Specialized Tarmac SL8 headset
🧩 Customizable height (standard 10 mm; custom heights available)
⚙️ Compatible with multiple integrated handlebars and stems
🌀 Smooth internal cable routing design
🪶 Lightweight 3D-printed PA construction
🧠 Factory-scanned geometry ensures perfect alignment with frame and compression ring
Customization Options
Custom height and stack configurations available
Support for STS internal routing or external cable setups
Option to match OEM compression ring and bearing cover
CAD verification or 3D scan-based fitment service upon request
For special cockpit systems or unique stack requirements, please contact us for a custom quotation before ordering.
Shipping information
Use this text to share information about your product.
Returns & warranty
Use this text to share information about your product.