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A foam ring that replaces the inner tube: the tyre keeps its shape even when punctured.
MEFO offers this mousse insert. The mousse fits inside the tyre in place of the inner tube. It is made of a special foam full of small sealed gas cells: pierced by a thorn or a stone, it does not go flat.
The benefits:
A mousse shrinks with hours and heat: replace it when the tyre feels soft, as if underinflated, or the rim hits stones.
Cross-Mania tip: Fit it with a dedicated mounting gel and respect the tyre size given; a mousse is replaced when it softens.
Universal part: check the dimensions given before ordering.
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