S-PARTS TC4 Titanium Front Thru Axle & Air Spring Top Cap for FOX MTB Fork

S-PARTS Titanium Upgrade Parts for FOX MTB Forks

Upgrade your compatible FOX mountain bike suspension fork with S-PARTS precision-manufactured TC4 titanium hardware.

This collection includes a titanium front thru axle and air spring top cap for compatible FOX MTB suspension forks, providing a premium alternative for riders looking for lightweight, corrosion-resistant and highly detailed titanium components.

TC4 Titanium Front Thru Axle

The S-PARTS titanium front thru axle is designed as a replacement upgrade for compatible FOX mountain bike suspension forks.

Manufactured from high-strength TC4 (Ti-6Al-4V) titanium alloy, it combines low weight, excellent corrosion resistance and high mechanical strength in a component that plays an important role in securing the front wheel to the fork.

• TC4 (Ti-6Al-4V) titanium construction
• High strength-to-weight ratio
• Excellent corrosion resistance
• Precision-machined threads and contact surfaces
• Multiple premium titanium finishes available

TC4 Titanium Air Spring Top Cap

The S-PARTS titanium air spring top cap is designed for the air spring side of compatible FOX MTB suspension forks.

Precision CNC machining provides accurate dimensions and clean interfaces, while the titanium construction adds a distinctive premium detail to the fork.

Please confirm that your exact FOX fork model and generation are compatible before ordering.

Premium TC4 Titanium Alloy

S-PARTS uses carefully selected S-grade TC4 (Ti-6Al-4V) titanium alloy for its premium titanium components.

The selected material has an average tensile strength exceeding 1050 MPa, providing an excellent combination of strength, low weight and corrosion resistance for high-performance bicycle hardware.

Precision Forging & CNC Machining

Selected S-PARTS titanium components are produced using dedicated tooling and precision manufacturing processes.

Hot-forged components are formed using dedicated dies, followed by precision CNC machining of critical dimensions, threads and contact surfaces.

This manufacturing process helps provide accurate thread engagement, consistent fitment and a refined finish.

PVD & Anodized Titanium Finishes

S-PARTS titanium components are available in a variety of premium finishes.

Depending on the selected color, PVD or anodizing processes are used to create distinctive metallic finishes while maintaining the characteristic appearance of titanium.

Choose from classic titanium tones or more distinctive colors to coordinate the fork hardware with the rest of your MTB build.

Specifications

• Brand: S-PARTS
• Product Type: MTB Suspension Fork Upgrade Parts
• Available Parts: Front Thru Axle / Air Spring Top Cap
• Compatibility: Selected FOX MTB Suspension Forks
• Material: TC4 Titanium Alloy (Ti-6Al-4V)
• Manufacturing: Precision Forging & CNC Machining
• Finish: PVD / Anodized, depending on selected color
• Application: Mountain Bike Suspension Fork

Compatibility Notice

FOX suspension fork specifications can vary by model, generation and axle configuration.

Please select the option specifically listed for your fork. Do not assume compatibility based only on fork appearance or stanchion diameter.

If you are unsure which version you need, please send us the exact FOX fork model, model year and a photo of the original component before ordering. We can help confirm compatibility.

Installation

• Compare the S-PARTS component with the original FOX part before installation.
• Make sure all threads and contact surfaces are clean and undamaged.
• Follow the fork manufacturer's installation and torque specifications.
• Do not overtighten titanium components.
• For thru axles, confirm complete thread engagement and secure front-wheel installation before riding.
• Professional installation is recommended if you are unfamiliar with suspension fork servicing.

Package Contents

The package includes the S-PARTS titanium component selected from the product options.

FOX suspension fork, wheel and other bicycle components shown in product images are for reference only and are not included.

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.