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Making grooves on roller wheels is supposed to improve speed and adherence for indoor wheels.
Certains tentent de reproduire les canaux d'évacuation des pneus de voiture pour rouler sous la pluie.
Some of us try to cut deep gouges into their wheels to get rid of rainwwater...
somewhere in between DIY and true innovation.
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we come back to old recipes.
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Et si la pluie se transforme en neige ... sortez les chaines !
And if rainwater turns to ice or snow - mind the chains !
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