While staring at the subtleties of prototype tires on Rémy Métailler’s Cube Stereo 170 enduro trail bike, it was impossible not to notice his STFU chain damper. Most modern full-suspension mountain bikes opt for intricate molded rubber chainstay protectors to limit chain noise (as does that Stereo 170), but gravity mountain bike legend Chris Kovarik had something else in mind. Not happy with the chain hitting the stays at all, he spent years developing a gadget to eliminate chain slap and quiet the drivetrain on his mountain bikes while bombing downhill…

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