GUESS this part

[Bfromla]

Hint - Yes, it is damaged. I had to replace it, so I do know what it is. Just posting this as a start for something else

 

[BajaRon]

Looks like an inner ball bearing race...

 

[trikermutha]

Wheel hub bearing, or what's left of it...

 

[Bfromla]

Both close

 

[Mikey]

You have my attention!!!

 

[Bfromla]

Will post the answer, let's say at 12 am Central Time

 

[Mikey]

 

[PMK]

Belt tensioner roller inner bearing race

 

[Wmoater]

Brake Caliper Rubber Bushing

 

[Bfromla]

Looks like an inner ball bearing race...

Wheel hub bearing or whats left of it..

Y’all were both close, but not quite. Granted, the tech said it was oddly unique when they saw it too.
FYI it's labelled simply as a spacer that fits between the bearing & the swing arm on the brake side.




When the bearing failed, it welded itself to the inner race



(the crack is the seam). Aluminum to steel weld, mind you!

This is what is supposed to look like.

With enough damage & heat, we thought it best if we replaced the rim.

Quick summary: I believe this is the result of hitting large patch/bump that launched the bike airborne less than a month earlier.

-

 

[Mikey]

That must have sounded like a bag of marbles!!! OMG

 

[trikermutha]

Yeah you didn't notice anything before the failure?

I would think it would be more bearing failure or axle not torqued properly.

But then again you would think the rim would have been damaged too??

 

[Bfromla]

That must have sounded like a bag of marbles!!! OMG

Really didn’t. There was some rhythmic clunking at slower speeds that it wouldn’t do when it was up on the jack & being turned by hand.

 

[Freddy]

Lack of lubrication.

 

[Mikey]

Bearings don't last forever, that's why they have to be check out from time to time!

 

[Little Blue]

Did you replace the 'rim or the hub'?
Just going by your pictures.