Specialized Tarmac SL8 Custom Headset Spacer | 3D Printed Adapter for Black Inc, Roval Rapide, Shimano Pro Vibe EVO, EXS, SEKA, The One Pro, Farsport, Cadex, ENVE, THM

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.

Compatible 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.

Supports STS full internal cable routing and custom stack heights (starting from 10 mm).

Key Features

• 🔩 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

Available Models (SKUs)

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

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.

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.

Compatibility Check: Due to the complexity of original equipment manufacturer (OEM) parts' models and batches, there may be instances where this product is incompatible.

Upon receiving this product, please compare it with the OEM specifications to ensure compatibility before installation.

Torque Specifications: Install this product strictly according to the torque values specified in the OEM parts manual.Installation Issues: If you encounter any discrepancies with the OEM specifications or face difficulties at the initial stage of installation, stop immediately and contact customer service for assistance with returns or exchanges.

No Forced Installation: Do not force installation under any circumstances.Liability: Any damages resulting from forced installation or unauthorized modifications of this product (or its components) will be the sole responsibility of the buyer.

All products are photographed to accurately represent the colors you will see upon receipt.

Due to differences in lighting, angles, or screen settings, slight color variations may occur.

The actual product should be considered the standard.For "colored" and "blue" products, the coloring process may result in uneven color distribution, making each product unique.