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Already checked? You can find even more exciting videos in the Checker World of the ARD media library: https://1.ard.de/checkerwelt. ???? Checker Can gets in the saddle and tests cool bikes. With a professional mountain biker, it's off into the terrain and up really steep hills - and hopefully back down again safely! * Comments are disabled to protect minors. If you have any questions or comments, please email [email protected].