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Swoofty

101 Ways to Torch a Rotor

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I often ride with a very talented 14 year old who always manages to break things in interesting ways. His latest feat was breaking a support from inside a disc rotor. I've tried to limit his exposure to bad habits from the start, but this one came from a locked rear brake on landing a sizeable 180 drop. It sounded just like a spoke breaking so we searched for a missing spoke and only checked the rotor much later in the ride. That was a new one for me. It was definitely time for a new rotor anyway.

IMG_20200606_105715.jpg

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14 hours ago, Swoofty said:

I often ride with a very talented 14 year old who always manages to break things in interesting ways. His latest feat was breaking a support from inside a disc rotor. I've tried to limit his exposure to bad habits from the start, but this one came from a locked rear brake on landing a sizeable 180 drop. It sounded just like a spoke breaking so we searched for a missing spoke and only checked the rotor much later in the ride. That was a new one for me. It was definitely time for a new rotor anyway.

IMG_20200606_105715.jpg

Now that is interesting. Never seen a rotor break that way. I have bent a few but never imagined this could happen...

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That's a ridiculous breakage! :lol:

Does it still function completely as normal, or has it kinked a bit resulting in a massive snag when that part gets touched?

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49 minutes ago, aener said:

That's a ridiculous breakage! :lol:

Does it still function completely as normal, or has it kinked a bit resulting in a massive snag when that part gets touched?

And most importantly, how much weight was saved in the operation?

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The old Montys had silly little notches cut in them that were stress risers and lead to lots of cracking, eventually the try-alls would do similar things. That said looks like pad contact is a little high, is that a 200 and it should be a 203 or something?

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On 6/15/2020 at 3:38 PM, PeterH said:

The old Montys had silly little notches cut in them that were stress risers and lead to lots of cracking, eventually the try-alls would do similar things. That said looks like pad contact is a little high, is that a 200 and it should be a 203 or something?

It's a 180 rotor and I mentioned the pad contact thing to him, but he doesn't want to file the adapter. I guess that could have played a part, maybe.

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