Those were sintered pads, but I'm not sure if the material would have mattered.
I suspect that environmental conditions (rain, winter road glop) the back plate had been exposed to initiated corrosion deteriorating the surface to which the bond of the pad was adhered. Then I dinged the edge of the pad material with the edge of the rotor and off it popped with a "plink". Not an "almost-used-up" brake pad, other was less than 25% worn. I agree Steve's observation. I didn't carry extra disc pads in my bag before that experience and I still don't. It's not a contingency with which I am willing to comply and consider it a weakness of the brake format and limits the range to which I'm willing to operate a disc brake bike. I've had all sorts of one-off problems with rim brakes too, perhaps requiring tools for adjustments but never dependent on me having a back up set of pads, including riding across the country. It's easier to look at my car's brake pads and see enough about their integrity and wear to know if it's safe to drive than it is to check out my disc bike's brake pads. Even if I look at them, I cannot surmise bonding failure potential with a glance any more than warranties, "highest quality" marketing can promises. I had a brake problem due to a pad on a set of Magura HS-11 hydraulc rim brakes. With the brake booster arch, the bike collected mud like nothing else. On a trail ride I was bogging up with mud and leaves faster than the group and just pushed along until someone else needed to carve mud out of their bikes. As I uncovered the brakes I also saw that I was missing a brake pad. I sifted the mud I removed, and realized that the pad was long gone, unclipped (those brakes don't have a robust connection to the pistons) and pushed away by accumulating mud. Never had that happen with cable operated rim brakes. Andy Cheatham Pittsburgh On Wednesday, December 27, 2017 at 6:20:14 PM UTC-5, William! wrote: > > Yikes! I keep spare pads in my patch kit because it’s hard to watch pad > wear so I’m paranoid about wearing a pair out during a ride. Now I have > another reason to! > > Out of curiosity, what sort of material were the pads? I’ve broken > resin-type pads while inserting them before but sintered pads seem to be a > bit more durable (and long lasting). > On Wed, Dec 27, 2017 at 2:49 PM ascpgh <[email protected] <javascript:>> > wrote: > >> Uh, I had a simple flat fix turn complicated when I replaced the front >> wheel in the fork, missing the gap between the pads in the caliper by a >> smidge and shearing the pad's braking material off the backer plate. That's >> not a roadside repair unless you carry a replacement pair in your bag. >> >> Short answer was to snag a rear pad out of the caliper to replace the now >> toothless front pad and put the padless plate into the rear caliper and >> riding home gingerly. >> >> Andy Cheatham >> Pittsburgh >> >> >> On Wednesday, December 27, 2017 at 2:07:53 PM UTC-5, lum gim fong wrote: >>> >>> Roadside maintenance easier on rim or disc brakes? >> >> -- >> You received this message because you are subscribed to a topic in the >> Google Groups "RBW Owners Bunch" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/rbw-owners-bunch/ROaS5akcDCk/unsubscribe >> . >> To unsubscribe from this group and all its topics, send an email to >> [email protected] <javascript:>. >> To post to this group, send email to [email protected] >> <javascript:>. >> Visit this group at https://groups.google.com/group/rbw-owners-bunch. >> For more options, visit https://groups.google.com/d/optout. >> > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
