Friday, March 11, 2022

Broken Mavic Ksyrium ES Spoke -- Part 1

Noticed at the Pier that the rear brake seemed to be dragging.

The reason the rear brake was dragging is that the wheel was not running true.

The reason it wasn't running true was that one of the spokes broke!
The spoke broke at the nipple on the rim.


I released the rear brake adjuster (used for removing the wheel/tire).
Rode home that way, so that the wheel wouldn't rub on the brake pads.
The broke spoke was still on the hub.

Took off the broken spoke from the hub.
It's held in place by the spoke tension so no tools required to remove the broken spoke from the hub.

This is where the "ball" head of the spoke fits on the hub.

Applied some penetrating oil on the nipple area and let it soak overnight.

I have some spare spokes but unfortunately, they're the wrong length.
The drive side spokes on the rear wheel are shorter than the non-drive side spokes.
Also the front wheel spokes are a different length than the rears.

The broken spoke has quite a bit of corrosion on the aluminum head.

The nipple end of the broken spoke (compared to the new spokes)

Where the spoke broke is right at the junction with the nipple.
Appears to be due to corrosion on the aluminum.


The length difference can be seen if the broken spoke is positioned correctly relative to the spare spokes...

 

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