Compression plug 1"1/8 for carbon and aluminium fork steerer - headset expander

Product Description

Compression plug 1"1/8 for carbon and aluminium fork steerer

Optimise the assembly of your headset with this 1"1/8 compression plug, specially designed for carbon and aluminium fork steerers. Made from aluminium alloy and 304 stainless steel, it ensures reliable headset preloading while protecting the fork steerer. Its adjustable expansion system guarantees a secure and lasting fit.

Technical specifications

• Product: Compression plug for headset
• Standard: 1"1/8 (28.6 mm)
• Compatibility: Carbon and aluminium fork steerers
• Expansion range: 22.2 to 25.4 mm
• Materials: Aluminium alloy + 304 stainless steel
• Colour: Silver
• Installation: 5, 6 and 8 mm hex keys
• Finish: Anti-corrosion treatment

Key features

• Designed for carbon steerers: allows headset compression without a star-fangled nut, which is essential on carbon forks.
• Also compatible with aluminium steerers: suitable for aluminium forks that use a compression plug.
• Adjustable expansion: diameter adjustable from 22.2 to 25.4 mm for an excellent hold inside the steerer.
• Robust construction: precision-machined aluminium alloy combined with a 304 stainless steel bolt.
• Reliable preloading: ensures precise headset adjustment and minimises unwanted play.
• Steerer protection: distributes stress inside the fork steerer for secure clamping.
• Corrosion-resistant: durable materials suited to intensive use in all seasons.
• Simple installation: quick fitting using standard hex keys.

Compatibility

• 1"1/8 headsets (28.6 mm)
• Carbon forks with steerer inner diameter from 22.2 to 25.4 mm
• Aluminium forks compatible with a compression plug
• Road bikes
• Gravel bikes
• Mountain bikes (MTB)
• Hybrid / city bikes
• Cyclocross bikes

Dimensions

• Expansion bolt: Ø 10 mm × 36.5 mm
• Expansion sleeve: Ø 21.6 mm × 30 mm
• Top cap: Ø 20 mm × 10 mm
• Base spacer: Ø 30 mm × 15 mm
• Expansion range: 22.2 to 25.4 mm

Installation guide

• Thoroughly clean the inside of the fork steerer.
• Disassemble the compression plug and apply a thin layer of grease to the metal parts (excluding the expansion sleeve if recommended).
• Insert the compression plug into the steerer.
• Tighten the expansion bolt using a 6 mm hex key (recommended torque: 20 N·m).
• Leave the steerer approximately 3 mm below the top of the stem.
• Fit the top cap and tighten with a 5 mm hex key (recommended torque: 20 N·m).
• Adjust the headset, then tighten the stem bolts in accordance with the manufacturer's recommendations.

Pack contents

• 1 × Expansion bolt
• 1 × Expansion sleeve
• 1 × Top cap
• 1 × Base spacer
• 1 × Complete compression assembly

Ideal for replacing a worn expander or fitting a carbon fork safely, this compression plug delivers reliable, precise and lasting clamping for your headset.