S-Parts Titanium Thru-Axle Kits

Lightweight Titanium Axles designed for Specialized Tarmac SL8 Performance Builds

The S-Parts Titanium Thru-Axle Kit is a premium upgrade designed to reduce weight, increase durability, and elevate the finish of the Specialized Tarmac SL8. Precision-machined from S-Parts TC4 Grade 5 titanium, these axles offer an exceptional strength-to-weight ratio while delivering a clean, technical aesthetic that complements one of the most advanced performance road bikes available.

Ideal for riders chasing marginal gains, custom builds, or long-term reliability, S-Parts titanium axles replace standard aluminium alternatives with a lighter, corrosion-resistant solution — without compromising stiffness or safety.

Total Weight for complete set – approximately 46.5g

Key Benefits

• Significant Weight Savings
  Titanium construction reduces weight compared to standard aluminium thru-axles, making this a simple upgrade for weight-conscious Tarmac SL8 builds.
• TC4 Grade 5 Titanium (Ti-6Al-4V)
  Industry-proven aerospace alloy known for outstanding strength, fatigue resistance, and longevity.
• Precision CNC Machined
  Tight manufacturing tolerances ensure accurate thread engagement, secure wheel retention, and consistent alignment.
• SL8-Specific Kit
  Designed specifically for the Specialized Tarmac SL8, with front and rear axles plus the required conical washers supplied as a complete set.
• Corrosion Resistant
  Titanium will not rust, making it ideal for year-round riding and long-term ownership.
• Clean, Premium Finish
  S-Parts' distinctive machining and range of titanium finishes make these an ideal finishing detail for high-end and custom SL8 builds.

Ideal For

• Specialized Tarmac SL8
• Lightweight race builds
• Custom colour builds
• Weight-conscious upgrades
• Riders upgrading from standard aluminium thru-axles

Technical Specifications

• Compatibility: Specialized Tarmac SL8
• Material: TC4 Grade 5 Titanium (Ti-6Al-4V)
• Manufacturing: CNC machined
• Front Axle: Ø12 / M12 / 120mm length
• Rear Axle: Ø12 / M12 / 164mm length
• Washers: 2 × M12 90° conical +2mm washers
• Tool Required: 6mm hex key
• Complete Set Weight: Approx. 46.5g
• Use: Front and rear thru-axle set

Why Choose S-Parts?

S-Parts focuses on high-value performance upgrades that deliver real gains without unnecessary hype. Their titanium components are chosen by riders who care about weight, function, and clean design — whether you're building a race bike or creating a completely individual Tarmac SL8.

Upgrade Where It Matters

Small changes add up. Swapping to an S-Parts Titanium Thru-Axle Kit is a simple, effective way to cut weight, improve corrosion resistance, and add another premium finishing detail to your Tarmac SL8.

Total Weight for complete set – approximately 46.5g

This is an aftermarket component and is not affiliated with or endorsed by Specialized Bicycles.

Why Choose S-Parts Titanium Bolts & Screws?

Small upgrade. Massive difference.

S-Parts are one of the most respected names in titanium bicycle bolts and screws, producing lightweight bike hardware designed for riders who care about performance and finishing detail. Since 2010, they’ve specialised in precision fixings for road, gravel, mountain and performance builds — helping riders reduce weight, prevent corrosion, and finish a bike properly.

Whether you’re chasing grams or building a clean custom colourway, S-Parts is one of the easiest ways to upgrade the details that most bikes leave behind.

With 1000+ bolt and screw options, S-Parts covers everything from cockpit hardware and bottle cages to drivetrain, brake and suspension fixings.

Why Titanium?

Stock hardware works — until it doesn’t.

Titanium is trusted across cycling because it offers an elite balance of:

• low weight
• high strength
• corrosion resistance
• long-term durability

S-Parts components are manufactured from TC4 Grade 5 titanium (Ti-6Al-4V) — an aerospace-grade alloy known for excellent fatigue resistance and strength-to-weight performance.

Many S-Parts titanium bolts and screws offer strength comparable to high tensile steel hardware, while weighing significantly less and staying corrosion-free year-round.

S-Parts Bolt & Screw Colour Options

S-Parts titanium hardware is available in 9 standout colourways:

• Blue
• Black
• Candy
• Gold
• Green
• Indigo
• Purple
• Rainbow
• Titanium

Perfect for matching frames, finishing kits, accent builds and custom upgrades.

How Are S-Parts Bolts & Screws Coloured?

S-Parts uses two proven finishing methods to achieve durable, high-end colourways:

Vacuum Nitriding

Used for:
Black, Blue, Gold, Rainbow

A hard-wearing surface treatment designed for durability and long-term appearance.

Anodising

Used for:
Candy, Green, Indigo, Purple

An electrochemical process that creates vivid colours while maintaining titanium’s natural corrosion resistance.

Measuring Your Bolts & Screws (Important)

Bolt sizing can be confusing — especially when brands measure hardware differently.

For S-Parts products, bolt and screw length refers to the shaft length only:
✅ measured from under the bolt head to the end of the thread.

S-Parts thread sizes range from M3 through to M10, covering the most common bicycle applications.

If you’re unsure what size you need, contact us — we’ll help you match the correct part.

Installation Note

Always follow your component manufacturer’s official installation instructions and torque settings. If in doubt, use a torque wrench and reach out before fitting.

Weights may vary by ±2% due to manufacturing tolerances.

Popular S-Parts upgrades: Titanium stem bolts • Titanium bottle cage bolts • Titanium chainring bolts • Titanium brake caliper bolts