Lixada MTB lega di alluminio della bicicletta e attacco manubrio della bicicletta da montagna 31.8mm : Amazon.it: Sport e tempo libero
Amazon.com : Funn Crossfire Mountain Bike Stem with 31.8mm Bar Clamp - Durable and Lightweight Alloy Bike Stem for Mountain Bike and BMX Bike, Length 35mm stem (Black) : Sports & Outdoors