Another day with wheels (and so on).
A customer had left me a Shamal Ultra front wheel for work.
WO rims experience outward force on the rim ears due to tire air pressure,
so when the brake zone wears down and the rim sidewall thickness decreases,
the rim starts to spread outward.
If you keep using it stubbornly, the rim sidewall will rupture.
You can see an example of rupture (here)
Rim sidewall deformation is hard to see, so
I put tape on it.
It's spread quite a bit.
Since the customer doesn't have any other wheels,
I've lent them my personal Nomo Lab wheel #5 while waiting for the rim to arrive and the repair to be completed.
But with Racing Zero and Shamal Ultra spare rims,
even though Japanese distributors had no stock and the home country had no stock either,
and we were told to wait for production, they arrived in about 3 months.
But this rim is taking about 9 months.
Well, you could say we're lucky they're providing a rim at all.
With Shimano and Mavic wheels from the same era as this Shamal Ultra,
you can't get a rim as a standalone part at all.
When I started work,
there were 3 spokes that needed replacement,
but our shop's spare spokes had run out,
so I ordered new ones including stock for future repairs.
Transferring spokes to the new rim...
There were several spokes deformed side-to-side in a wavy pattern.
The actual cause is probably different,
but if you sit down on a wheel laid on its side,
the spokes should deform like this.
There were no spokes with plastic deformation in the front-to-back direction,
so I straightened out the wavy ones and reused them.
I replaced the rim.
There were 3 nipples stuck tight and wouldn't loosen.
The image above only shows 2 because
I managed to loosen one using a method that's not normally possible.
↑This is not the valve hole.
This is the rim hole for the nipple.
I drilled a hole on the outer side
to get the nipple out from inside the rim.
The hook width of the spoke head is wider
than the diameter of the hole on the inner side of the rim,
so this alone isn't enough to recover the spoke with nipple.
↑Recovered nipples and spoke
I tried heating the nipple from the outside and applying oil
and other methods that require destroying the rim
to manage to loosen it somehow, but
The aluminum where the threads were engaged
was pulled away by the seizing with an abnormally heavy feel,
so it was no longer in a condition for reuse.
Also, this spoke was pretty wavy too.
A customer had left me a Shamal Ultra front wheel for work.
WO rims experience outward force on the rim ears due to tire air pressure,
so when the brake zone wears down and the rim sidewall thickness decreases,
the rim starts to spread outward.
If you keep using it stubbornly, the rim sidewall will rupture.
You can see an example of rupture (here)
Rim sidewall deformation is hard to see, so
I put tape on it.
It's spread quite a bit.
Since the customer doesn't have any other wheels,
I've lent them my personal Nomo Lab wheel #5 while waiting for the rim to arrive and the repair to be completed.
But with Racing Zero and Shamal Ultra spare rims,
even though Japanese distributors had no stock and the home country had no stock either,
and we were told to wait for production, they arrived in about 3 months.
But this rim is taking about 9 months.
Well, you could say we're lucky they're providing a rim at all.
With Shimano and Mavic wheels from the same era as this Shamal Ultra,
you can't get a rim as a standalone part at all.
When I started work,
there were 3 spokes that needed replacement,
but our shop's spare spokes had run out,
so I ordered new ones including stock for future repairs.
Transferring spokes to the new rim...
There were several spokes deformed side-to-side in a wavy pattern.
The actual cause is probably different,
but if you sit down on a wheel laid on its side,
the spokes should deform like this.
There were no spokes with plastic deformation in the front-to-back direction,
so I straightened out the wavy ones and reused them.
I replaced the rim.
There were 3 nipples stuck tight and wouldn't loosen.
The image above only shows 2 because
I managed to loosen one using a method that's not normally possible.
↑This is not the valve hole.
This is the rim hole for the nipple.
I drilled a hole on the outer side
to get the nipple out from inside the rim.
The hook width of the spoke head is wider
than the diameter of the hole on the inner side of the rim,
so this alone isn't enough to recover the spoke with nipple.
↑Recovered nipples and spoke
I tried heating the nipple from the outside and applying oil
and other methods that require destroying the rim
to manage to loosen it somehow, but
The aluminum where the threads were engaged
was pulled away by the seizing with an abnormally heavy feel,
so it was no longer in a condition for reuse.
Also, this spoke was pretty wavy too.