Product Description

S-PARTS Tarmac SL8 Grade 5 Titanium Thru Axle Set

Designed specifically for riders seeking the ultimate combination of lightweight performance, precision engineering, and premium aesthetics, the S-PARTS Titanium Thru Axle Set is a direct upgrade for the Specialized Tarmac SL8.

Manufactured entirely from aerospace-grade Grade 5 Titanium (Ti-6Al-4V), this complete front and rear axle set delivers exceptional strength, corrosion resistance, and weight savings while maintaining the reliability required for everyday riding and racing.

At just 46.5 grams per set, it offers a significant weight reduction compared to conventional steel axles without compromising structural integrity.

Package Includes

• Front Thru Axle – M12 × 120mm × P1.0
• Rear Thru Axle – M12 × 164mm × P1.0
• 90° Tapered M12 Conical Washers (+2mm Offset) × 2

Specifications

• Brand: S-PARTS
• Material: Grade 5 Titanium (Ti-6Al-4V)
• Compatibility: Specialized Tarmac SL8
• Front Axle Size: M12 × 120mm × P1.0
• Rear Axle Size: M12 × 164mm × P1.0
• Thread Pitch: 1.0mm
• Weight: Approx. 46.5g/set
• Recommended Tool: 6mm Hex Key
• Manufacturing Process: Full CNC Machining
• Dimensional Tolerance: ±0.02mm

Available Colors

• Gold
• Black
• Blue
• Green
• Purple
• Rainbow (Oil Slick)
• Indigo
• Candy

Why Choose Grade 5 Titanium?

Grade 5 Titanium (Ti-6Al-4V) is widely regarded as the benchmark material for premium cycling hardware.

Compared with traditional steel axles, titanium offers approximately 45% lower weight while maintaining outstanding mechanical strength. Its tensile strength exceeds that of many Class 10.9 steel fasteners, making it an ideal choice for performance-oriented road bikes.

In addition, titanium provides natural corrosion resistance and will not rust when exposed to rain, mud, road salt, or humid riding environments.

Premium Surface Finishes

PVD Vacuum Nitride Coating

(Gold / Black / Blue)

These colors are produced using an advanced Physical Vapor Deposition (PVD) vacuum nitriding process.

The treatment creates a dense metallic nitride layer on the surface, increasing hardness, wear resistance, and impact resistance while delivering deep, vibrant colors.

Unlike conventional paint or dye-based finishes, the coating becomes an integral part of the surface. Under normal riding conditions, the finish remains stable and highly resistant to fading, even through wet and muddy rides.

Anodized Titanium Finish

(Green / Purple / Rainbow (Oil Slick) / Indigo)

These finishes are created through a precision electrochemical anodizing process.

Rather than using pigments or dyes, different oxide-film thicknesses alter the way light interacts with the titanium surface, creating vivid colors through optical interference.

The result is a uniquely rich appearance that shifts subtly under changing light conditions while also enhancing surface hardness and corrosion resistance.

Precision CNC Machining

Every axle and washer is fully CNC machined from solid Grade 5 titanium and manufactured to strict tolerances within ±0.02mm.

Each component is carefully finished to ensure precise fitment, smooth installation, and long-term durability, providing the level of quality expected from a premium titanium upgrade.

Whether you're building an ultra-lightweight race bike, refining your dream Tarmac SL8 project, or simply replacing stock hardware with something stronger and more distinctive, the S-PARTS Titanium Thru Axle Set delivers performance, reliability, and craftsmanship in every detail.