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While jokingly aimed at helping bike shops avoid those extended “test rides” that pull mechanics out of the service bay for too long, the Bonas Labs Disc-O-Matic’s real purpose is to quickly and properly bed in disc brakes before a new bike is sent out to shred.
Founder Jonas Mikolayunas says that, too often, bikes are assembled and then turned over to the rider without having the brakes fully bedded and burnished, if at all. The result are underperforming brakes, especially when the rider doesn’t know how to (or even know that they should) spend a few minutes to bed in new pads and rotors.
“The goal of the bedding & burnishing process,” according to Mikolayunas, “is to create a tribolfilm on the pad and rotor surfaces which, unfortunately, can only be detected with expensive laboratory spectroscopy equipment.”
In laymen’s terms, that means embedding pad material into the rotor’s surface to maximize surface contact area, then heat it until it creates a film to maximize friction during braking, and there’s an art and science to the process. Too much speed or pressure can do a poor job of transferring enough material, or prematurely glaze the pads slightly and diminish braking power. Geek out on the process with their Explainer article . Mikolayunas: “While the final test for the tribofilm presence still relies on the mechanic’s experience and touch to feel for the “before and after” bedding […]