S-Parts SL Series Titanium Disc Rotor Lockring (EXTERNAL)

The S-Parts SL Series Titanium Disc Rotor Lockring is the next evolution of S-Parts' lightweight centre-lock hardware, combining an extensively machined profile with TC4 Grade 5 titanium construction and an exceptionally low weight of approximately 6.1g.

Designed for riders who care about weight, performance and the finer details of a high-end build, the SL Series removes unnecessary material from the lockring to reduce weight while creating a distinctive, technical appearance.

Manufactured from TC4 (Grade 5) titanium, it delivers an exceptional strength-to-weight ratio, excellent fatigue resistance and outstanding corrosion resistance — making it a functional upgrade as well as a premium finishing component.

At just ~6.1g per lockring, the SL Series takes an already lightweight component and pushes it even further.

Alongside the standard S-Parts colour range, the SL Series is also available in three premium Artist Series finishes: Hawaii, Nebula and Contour.

Available Colours

Standard Series

• Gold
• Rainbow
• Titanium (Natural)
• Black
• Blue
• Candy
• Green
• Purple
• Indigo

Artist Series – Premium Finishes

• Hawaii
• Nebula
• Contour

The Artist Series introduces more intricate multi-tone finishes for riders looking for something beyond a conventional titanium colourway — ideal for custom builds where every finishing detail matters.

Key Features

• CNC-machined TC4 / Grade 5 titanium
• SL Series extensively machined lightweight profile
• Ultra-lightweight: ~6.1g per lockring
• Centre-lock compatible
• High corrosion resistance
• Precision external spline interface
• 44mm external diameter
• Nine standard S-Parts colour options
• Three premium Artist Series finishes
• Compatible with Park Tool BBT-9 or equivalent

Specifications

• Thread: M30 × 7
• Outer Diameter: 44mm
• Inner Diameter: 30mm
• Material: TC4 Grade 5 Titanium (Ti-6Al-4V)
• Weight: ~6.1g per lockring
• Type: External spline centre-lock rotor lockring
• Tool Required: Park Tool BBT-9 or equivalent
• Finish: Colour dependent

Installation

• Designed for compatible centre-lock disc rotor systems
• Recommended tool: Park Tool BBT-9 or equivalent
• Check hub and axle clearance before installation
• Install according to the hub/rotor manufacturer's specified torque values

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 standard colourways:

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

Selected S-Parts SL Series components are also available in premium Artist Series finishes, including Hawaii, Nebula and Contour.

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

How Are S-Parts Bolts & Screws Coloured?

S-Parts uses specialist finishing processes to achieve its distinctive range of titanium 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.

Artist Series

Available on selected SL Series components in:

Hawaii • Nebula • Contour

These premium finishes take S-Parts' custom hardware a step further, creating intricate multi-tone patterns for builds where the smallest details are part of the overall design.

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