S-PARTS Titanium Steerer Tube Preload System – Colnago Y1Rs

Hidden Weight. Properly Upgraded.

Designed specifically for the Colnago Y1Rs, the S-PARTS Titanium Steerer Tube Preload System replaces the original steerer compression and preload assembly with a beautifully engineered TC4 Grade 5 titanium system.

Offering up to 40% weight reduction compared with the stock assembly, it combines meaningful weight savings with the strength, corrosion resistance and precision manufacturing expected from S-PARTS.

It may be hidden inside the bike, but on a build like the Y1Rs, every detail matters.

Up to 40% Lighter

S-PARTS has re-engineered the Y1Rs preload assembly around lightweight titanium construction.

Depending on size, the complete system weighs from just 54.5g, delivering up to a claimed 40% reduction in weight compared with the original factory assembly.

It's exactly the kind of upgrade that makes sense on a high-end race build — removing unnecessary weight from a component that is often overlooked.

TC4 Grade 5 Titanium

The system is manufactured from S-PARTS TC4 Grade 5 titanium alloy, selected for its exceptional combination of strength, low weight and corrosion resistance.

For components positioned within the steerer and headset area, where moisture and rider sweat can find their way into the assembly, titanium is particularly well suited.

The result is a lightweight, durable and beautifully manufactured replacement for the original system.

Designed Specifically for the Colnago Y1Rs

This isn't a universal compression plug adapted to fit.

The complete system has been designed specifically around the Colnago Y1Rs steerer and headset assembly, providing a dedicated replacement for the original preload system.

Three versions are available to correspond with different Y1Rs frame sizes.

Simply select the appropriate Small, Medium or Large option for your bike.

Complete Preload System

Rather than simply replacing an individual bolt, the S-PARTS kit upgrades the complete Y1Rs steerer preload assembly.

Every component has been engineered with the attention to detail that defines the S-PARTS range, creating an upgrade that's as much about precision and material choice as it is outright weight saving.

Weight by Size

Small: 54.5g
Medium: 60.5g
Large: 68.5g

Weight saving: Up to 40% compared with the stock assembly.

Technical Specifications

Product: S-PARTS Titanium Steerer Tube Preload System

Compatibility: Colnago Y1Rs

Material: TC4 Grade 5 Titanium Alloy

Available Sizes: Small / Medium / Large

Weight:

• Small – 54.5g
• Medium – 60.5g
• Large – 68.5g

Installation Tool: 5mm Hex Key

Available Finishes: Black / Silver / Gold

Why Upgrade?

• Up to 40% lighter than the stock assembly
• TC4 Grade 5 titanium construction
• Excellent strength-to-weight ratio
• Highly corrosion resistant
• Designed specifically for the Colnago Y1Rs
• Complete steerer preload system
• Available in Small, Medium and Large
• Available in Black, Silver and Gold
• Ideal for lightweight race bikes and premium custom builds

Built for the Details You Can't See

Some of the best upgrades aren't immediately visible.

The S-PARTS Y1Rs Titanium Steerer Tube Preload System removes weight from a component buried inside the front end while replacing the original assembly with precision-manufactured TC4 titanium hardware.

For a bike as special as the Y1Rs, it makes sense to pay attention to the components you can't see as well as the ones you can.

Up to 40% lighter. TC4 titanium. Built specifically for the Y1Rs.