Just recently changed the rear brake pads on the bike and switched from oem to galfer. My rim has a polished lip and before with oem there was hardly any dust to stop the shine but these new galfers..haha insane amount of brake dust. Only been riding on the new pads about a week and the polished lip looks like a grey metallic.
Granted the pads are great but are they known for producing that much brake dust..
i think that it depends on the material that the pads are made of too, certain materials produce more dust than others, and like zoomsplat stated there might be more dust produced in the break in period as well.
when you change the pads and/or rotors, you have to "burn them in" or seat them. Like taking it easy on a new tire to scrub it in for 50 miles or so.
30 stops from 30 mph with 30 seconds cool off time in between is the general rule. It heats everything up and scrubs the friction surfaces so that they match.
Rotors have grooves in them like a record, they're there from the machining process and there's nothing you can do about it. Pads are flat, but have a sort of "orange peal" texture to them from the different shapes of the different compounds that make up the friction material. Essentially what you're doing is wearing down the surface of the pad so that it matches the profile of the rotor. This will produce dust because you're trying to do more braking with less surface, so there's a lot more pressure ripping into the material on the pad until it mates right with the rotor.
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