Precision machining. Exceptional detail. Titanium taken to another level.

Some components deserve a closer look.

The HOTCHECK S-Grade Titanium Thru-Axle Kit for the Specialized Tarmac SL8 and SL9 is an exceptional example of what happens when precision engineering meets an obsession with detail.

Manufactured from S-Grade titanium alloy, this front and rear thru-axle set combines exceptionally low weight with an extraordinary level of CNC-machined detail.

The distinctive axle heads feature sculpted geometric patterns, precision-machined surfaces and subtle contrasting accents. From the intricate tool interfaces to the polished titanium finish, every element has been carefully considered.

These are components designed to perform a fundamental job, but finished to a standard that makes them anything but ordinary.

Just 32 Grams. Front and Rear.

Weighing just 32 g for the front and rear axles, including titanium washers and seals, the HOTCHECK kit offers a remarkably lightweight upgrade.

With both supplied titanium 8-to-6 mm hex adapters included, the complete kit weighs approximately 33 g.

Every gram considered. Every detail refined.

All weights are manufacturer-stated.

Intricate CNC Machining

It's the finishing that truly sets these axles apart.

The sculpted titanium heads feature complex geometric machining, creating a distinctive appearance that complements the clean lines of the Specialized Tarmac SL8 and SL9.

Detailed machining, engraved HOTCHECK branding and carefully finished surfaces give these components a visual identity of their own.

A functional upgrade for riders who appreciate the smallest details.

8 mm Interface. 6 mm Convenience.

The HOTCHECK thru-axles feature an 8 mm hexagonal tool interface.

Two lightweight titanium adapters are also supplied, allowing the axles to be installed and removed using a 6 mm hex key.

A considered addition for riders who prefer carrying a smaller multitool when out on the road.

Considered Down to the Packaging

HOTCHECK's attention to detail extends beyond the components themselves.

Each kit is supplied in a purpose-designed, reusable storage case, providing a practical place to keep the original thru-axles or other small components removed during installation.

It's another thoughtful detail that reflects HOTCHECK's approach to engineering, design and presentation.

Technical Specifications

What's Included?

• 1 × HOTCHECK Front Titanium Thru-Axle

• 1 × HOTCHECK Rear Titanium Thru-Axle

• 2 × Titanium Washers

• 2 × Rubber Sealing Rings

• 2 × Titanium 8-to-6 mm Hex Adapters

• 1 × HOTCHECK Reusable Storage Case

Compatibility & Installation

Specifically designed for the Specialized Tarmac SL8 and SL9.

Front axle: 120.5 mm, M12 × 1.0 mm.

Rear axle: 164.5 mm, M12 × 1.0 mm.

Manufacturer-specified tightening torque: 10 N·m.

Before installation, verify compatibility with your bicycle and follow the manufacturer's installation instructions. Apply suitable grease to the axle threads as specified in the HOTCHECK manual and use a calibrated torque wrench.

Professional installation is recommended.

HOTCHECK — Titanium Modding Masters.

Performance is the baseline. Aesthetics is the obsession.