Bed in disc brakes
#1
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Bed in disc brakes
I have a new bike and failed to bed-in the disc brakes. It just sort of slipped my mind. I’ve ridden the bike a couple of times for like 4 hours total. Can I clean the rotors with isopropyl alcohol and do the bedding process now? Or just not worry about it?
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Just hold down either the front or back lever and pedal hard. If you start to grind to a halt, you are probably at that point bedded in ok. It never hurts to clean the rotors with isopropanol, but probably isn't necessary for this. If the pads are totally glazed over (unlikely), you can take them out, briefly sand them on some sandpaper, and then put them back on.
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Like the proverbial chicken soup, cleaning the rotors (and pads)may not help but it couldn't hurt. Better to bed them in clean than risk baking in contaminants, including finger oils, so don't touch the pads or braking surfaces after cleaning.
I would use automotive Brakleen or similar rather than alcohol, which is not great at dissolving petroleum-based contaminants; just don't get it onto paintwork.
I would use automotive Brakleen or similar rather than alcohol, which is not great at dissolving petroleum-based contaminants; just don't get it onto paintwork.
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Thanks for the suggestions. I just went ahead and went through the bedding in process. I didn’t clean the rotors or anything just left as-is.
#6
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You've ridden the bike for four hours already right? Did it stop properly on those rides? If it did, leave the brakes as is and just ride.
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#10
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All the bedding does is putting some brake pad dust on the rotor. The tiny surface imperfections will be filled. it will happen on its own by braking. for the first few miles just ride more carefully since you won't have 100% brake power yet. Same with a car, where they tell you there is a few miles brakin period. No one does specific procedures with cars or motorbikes.
#12
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It's important in that the first few stops on new rotors/pads - they don't stop very well. Bedding in is really just being aware of this so you work the brakes a few times to ensure they will respond as you expect when you really need them. My LBS told me to do 10 hard stops. In my experience the braking power increases dramatically in the first three stops, after that, they seem to work fine.