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M Part Expander Bung. The best solution for forks which feature a 1-1/8 inch carbon composite steerer tube, where the use of a normal star nut is not advisable.
Key Features:
- Headset tensioning top cap expander system for use in carbon composite steerer tubes.
- Expands inside the steerer tube.
- Causes no scoring or marking inside the steerer.
- Recommended for carbon composite steerer tubes.
- Anodised black finish with a lacquered carbon fibre top cap.
- Great looking and extremely functional.
- Weight: 41g (PBK office scales).
- M-Part
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