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Old 09-29-11, 07:42 PM   #1
ESW116
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Really tried searching for a thread...didn't find it. Wearing in discs?

I just bought a new MTB (see post your rigs) and am wondering about the discs on it. It stops fine but I read that new discs tend to wear in before they reach their max stopping power. Or is it just because the grease and stuff from customers touching all on it gets scrubbed off?
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Old 09-29-11, 08:24 PM   #2
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Burnish – Brake power is generated by the friction material on the pads embedding into the surface of the rotor, re-bonding to the friction material still on the pads and then breaking apart or shearing. In order for this bonding/shearing to occur, the friction material must first be displaced onto the surface of the rotor. This typically happens during the first 10 – 50 stops of a brake system and is referred to as “burnishing” the rotor and pads. When a rotor is cleaned, it will need to be re-burnished again to re-deposit the friction material onto the surface.

More reading for you: http://www.hayesdiscbrake.com/hayes-u/
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Old 09-29-11, 08:43 PM   #3
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That was quite informative. Thank you sir.
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Old 09-30-11, 09:28 AM   #4
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For my motorcycle, my friend always told me to bring the bike to about 60mph, then brake hard down to overheat the pads, then let them cool off by slowly getting back to 60mph, repeat. I usually did this about 10 times & always notice the braking getting slightly better after doing so. I've always tried to do the same on my bike, just to a lesser degree since I can't get my MTB to 60mph.
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Old 09-30-11, 06:37 PM   #5
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My Maguras' came with a manual that said I should brake hard from 30mph(!) at least Eight times to wear them in. I need to find a big hill around here.
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