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Machined Headset Expander Plug

Machined Headset Expander Plug

Regular price €19.95 EUR
Regular price Sale price €19.95 EUR
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Colour: Purple

The JRC Superlight Headset Expander Plug is one of the lightest headset expanders on the market. Rigorous testing has led to using the minimum amount of the highest quality aluminium to ensure maximum performance.

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-CNC-Machined 6061 Aluminium


-Compatibility: 1 1/8" forks
-Min/Max; 21mm - 25.2mm


-1x Expander Plug with O-Ring
-2x Spare O-Rings



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Product Manual

Superlight Headset Expander Plug

One of the lightest headset expanders on the market; born through rigorous testing to the bare amount of material without compromising on performance.


  • Super lightweight at only 13 grams
  • CNC Machined Aluminium body
  • Compatibility: 1 1/8" forks
  • Min/Max; 21mm - 25.2mm
  • Total Weight: 13 grams


  • Lightweight Headset Expander
  • 2x Spare Rubber O-Rings

Have you found what you are looking for?

  • Check out our finishing kits and accessories for the perfect optical tuning for your bike!
  • What type of steerer is this expander plug suitable for? It is intended for use with a 1 1/8'' diameter, carbon fibre steerer fork.

    What's the minimum and maximum expansion of the plug? It will fit any steerer with an internal diameter from 21mm - 25.2mm as steerer wall thicknesses may vary.

    Can I use my original headset top cap and bolt? If it's an M6 bolt, you certainly can. An M6 bolt is used extensively for this purpose across the bike industry.