Product Description

S-PARTS Tarmac SL8 3DAM Titanium Thru Axle Set

The S-PARTS 3DAM Series represents a new generation of cycling components engineered through advanced metal additive manufacturing.

Designed specifically for the Specialized Tarmac SL8, this ultra-lightweight thru axle set combines aerospace-grade Grade 5 Titanium (Ti-6Al-4V), topology optimization, and Selective Laser Melting (SLM) technology to achieve a level of weight reduction and structural efficiency that traditional machining simply cannot match.

Built layer by layer from high-purity titanium powder, each axle is engineered to place material precisely where it is needed and eliminate it where it is not. The result is an exceptionally lightweight, visually distinctive, and performance-driven axle system built for riders who demand the very best.

Package Includes

• 1× Front Thru Axle
• 1× Rear Thru Axle
• 2× 90° Tapered M12 Conical Washers (+2mm Offset)

Specifications

• Brand: S-PARTS
• Series: 3DAM
• Material: Grade 5 Titanium (Ti-6Al-4V) Powder
• Manufacturing Process: Metal Additive Manufacturing / Selective Laser Melting (SLM)
• Compatibility: Specialized Tarmac SL8
• Front Axle Size: M12 × 120mm × P1.0
• Rear Axle Size: M12 × 164mm × P1.0
• Thread Pitch: 1.0mm
• Weight: Approx. 36.6g / set
• Recommended Tool: 6mm Hex Key / Torque Wrench (Install according to frame manufacturer specifications)

Available Colors

• Gold
• Black
• Blue
• Rainbow (Oil Slick)
• Splatter Pop
• Neon Splatter
• Digital Camo
• Tiger Green-Gold
• Jaguar Green-Gold
• Snowstorm

What Is 3DAM?

3DAM (3D Additive Manufacturing) is fundamentally different from conventional CNC machining.

Rather than removing material from a solid billet, additive manufacturing builds a component layer by layer from titanium powder according to a precise digital model.

This approach unlocks design possibilities that were previously impossible to manufacture, allowing engineers to create optimized internal geometries, hollow structures, and advanced load-distribution pathways while maintaining exceptional strength and reliability.

Ultra-Lightweight by Design

Every gram matters when building a high-performance road bike.

Through topology optimization, simulation-driven engineering, and additive manufacturing, the complete axle set weighs approximately 36.6 grams.

Compared with conventional steel thru axles, significant weight is removed without sacrificing structural integrity, creating an ideal balance between performance, reliability, and efficiency.

Topology-Optimized Engineering

The greatest advantage of additive manufacturing is not simply that a part is 3D printed.

Using advanced simulation software and structural analysis, every critical load path within the axle has been carefully evaluated and optimized. Material is added only where strength is required and removed where it serves no structural purpose.

The result is a highly efficient structure that maximizes stiffness, durability, and weight savings simultaneously.

Aerospace-Grade Titanium Performance

Manufactured from aerospace-grade Grade 5 Titanium (Ti-6Al-4V), the axle system delivers:

• Outstanding strength-to-weight ratio
• Excellent fatigue resistance
• Exceptional corrosion resistance
• Long-term structural reliability
• Low density and high mechanical performance

Combined with SLM manufacturing technology, the material provides an ideal balance between lightweight performance and real-world durability.

Selective Laser Melting Technology

Each axle begins as ultra-fine titanium powder.

Using a high-energy laser beam, the powder is selectively melted and fused layer by layer to create a dense, highly uniform structure with excellent mechanical properties.

This process enables complex geometries and structural features that are impossible to achieve through traditional subtractive machining methods.

Refined Industrial Design

The visual language of the 3DAM Series reflects the same engineering philosophy found throughout the product.

Clean surfaces, purposeful geometry, and carefully sculpted transitions create a modern industrial aesthetic without unnecessary decoration.

A standard 6mm hex interface ensures straightforward installation and precise torque control while maintaining a clean and minimalist appearance.