Cracked hub
 

Well, I was cleaning this front wheel and surprise!!
It is a cracked there.
The wheel is not usable anymore, isn't it?

https://cimg3.ibsrv.net/gimg/bikefor...fdf10b12d9.jpg
https://cimg4.ibsrv.net/gimg/bikefor...265eb8f174.jpg

Incorrect. (double negative)

Sorry, smart ass here.

Yup - scrap yard fodder. Sad to discover things like this and it has happened to me more than once, or twice or three...

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hubs are similar to bench vises and electric heating elements in that they carry with them the means of their own destruction

if the drive side cone is not cinched tightly against the locknut the rotation of the wheel can tighten the cone until it fractures the hub


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I wouldn't use a cracked hub. But if you found a replacement with the same dimensions, you could use the same spokes and rim with it.

How it can happen?

Should have bought Campagnolo.

zinc spokes.
dead hub
no idea on rim.
new wheel time

Is this the cracked hub thread? Here is mine, a Campy unit that failed suddenly and spectacularly on a short climb.

https://cimg6.ibsrv.net/gimg/bikefor...529421d6ef.jpg

It's dead, Jim. My example...
https://cimg1.ibsrv.net/gimg/bikefor...702b3f3867.jpg

I think I'm going to go inspect my fleet this morning...

You don't know your own strength. Must have made an interesting sound.

Question: Did the ratchet ring break, also? Or, just the hub shell?

I didn't take it apart to see but it feels like the ratchet and the free hub are still functional. I didn't feel the need for an autopsy though since dead is dead! It is just for display on my wall of fame.

Implication [MENTION=212717]old[/MENTION]hairhead is a destructive tester.

That reminds me of the Shimano front hub high flange I cracked at the spoke circle. I rode the short distance home very slowly and gingerly and moved the spokes, rim, axle, and bearings to a different hub shell. Kinda scary, even though no harm done in my case.

Personally I prefer to build with stainless spokes. We don't see the rim brand/model.

I suppose, rebuild if one wishes to match the other wheel, otherwise replace.

I take my work seriously!

https://cimg2.ibsrv.net/gimg/bikefor...8670fa3c87.jpg

missing a metalurgical examination under a high-power microscope, I’d assume a misfit between the diameter of the hardened bearing cup, and the diameter of the bearing seat cut into the hub body. The cup being too big for the hole, and the strain eventually cracking the hub shell. To some undetermined amount helped on by riding stresses.