mountain biking
US /ˈmaʊn.tɪn ˌbaɪ.kɪŋ/
UK /ˈmaʊn.tɪn ˌbaɪ.kɪŋ/

1.
mountain biking, ciclismo in mountain bike
the sport of riding bicycles off-road, often over rough terrain, using specially designed mountain bikes
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We went mountain biking in the Alps last summer.
Siamo andati in mountain bike sulle Alpi la scorsa estate.
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Mountain biking requires good balance and stamina.
Il mountain biking richiede buon equilibrio e resistenza.