Today it's wheels again (and so on).
Continuing from yesterday.
I'm rebuilding the Mechanic's wheel.
Unmarked straight-pull spoke hub, 24H
All-black CX-RAY with forced 2-cross lacing on both sides.
Like the rear wheel, I'm changing the nipples from Sapim 14mm black aluminum
to DT 12mm black aluminum.
I left only the four spokes from the final crossing on both sides,
continuous from the valve hole.
I haven't turned any of these nipples at all.
I made a mark with a white oil-based pen
on the inner end face of each nipple.
↑I recovered those four spokes.
The two spokes in the upper part of the image are the long ones for the right side,
and the two at the bottom are the short ones for the left side.
When I align the ends at the spoke head side
↑This is what happens at the threaded end.
There's individual variation in length between
the long spokes and the short spokes.
While my white marking technique isn't perfect,
if I were to use 12mm aluminum nipples
on the second and third spokes from the top,
the possibility exists that
the threaded portion would be visible from the nipple
once the wheel is fully built.
These spokes are somewhat short on both sides,
but the longer ones are just barely within acceptable length plus
they'll be under more tension than the original state, so
I reused them.
For the shorter ones, I'm preparing
black CX Sprint spokes that are slightly longer than this length.
Yesterday's rear wheel had a much larger difference
in length between left and right sides than today's front wheel,
a difference where "both lengths being correct" was impossible.
In such cases, the patterns are:
1. The long one is correct and the short one is slightly short
2. The short one is correct and the long one is slightly long
3. The long one is too short and the short one is out of the question
4. The short one is too long and the long one is out of the question
This was leaning toward pattern 3, closer to pattern 1,
and I had a rough time trusting the original CX-RAY length
for the shorter spokes I was changing to CX Sprint.
About the most interesting thing I noticed with this wheel.
The image above is the original left-side spoke,
the shorter spoke on the rotor mount side,
↑There are wear marks at the final crossing.
↑This is the spoke on the right side,
the longer spoke on the anti-rotor side,
which should theoretically be the low-tension side,
but this one actually has
more modest wear marks at the final crossing.
Without definitive proof,
I suspect that on the front wheel (which isn't the drive wheel),
the high-tension side experiencing more severe wear at the final crossing
might be due to the disc brake forces.
When accelerating from 0 to 30 km/h with pedaling,
the torsional stress on the rear wheel's right-side spokes
versus when braking from 30 to 0 km/h with the front brake alone,
the torsional stress on the front wheel's left-side spokes—
considering both at their maximum (zero-start grunt and hard braking)
and the time required to achieve each,
the front brake scenario might actually impose greater stress.
But that's just speculation from this one instance.
It's built.
I changed the rotor mount side to
CX Sprint.
I'll do the truing on the CX-RAY side later.
When it comes to truing, the front wheel is either way, fine—
the rear wheel requires it.
The hub looks unusually clean because,
while I didn't take original photos,
I cleaned it quite thoroughly.
Regarding the rims for both wheels this time,
I'd only noted that they were tubeless-compatible rims.
From actual measurement, the rim height is 35.2mm
and the internal width is 19.3mm,
so 35mm and 19mm would be appropriate.
The rims are the same front and rear, but
the front rim was lighter.
My practice is to put the lighter rim on the rear wheel
when building front and rear wheels with the same spoke count and rims,
but since I disassembled and rebuilt each separately
rather than taking them apart simultaneously,
this time it happened to work out this way.
Actual weight and weight difference? Like hell I'm telling you that
↑Ugh, this guy has a terrible attitude
My apologies for the wait! Please take a look at this image!
It's the rear rim!
It's the front rim!
↑Stop it!
Continuing from yesterday.
I'm rebuilding the Mechanic's wheel.
Unmarked straight-pull spoke hub, 24H
All-black CX-RAY with forced 2-cross lacing on both sides.
Like the rear wheel, I'm changing the nipples from Sapim 14mm black aluminum
to DT 12mm black aluminum.
I left only the four spokes from the final crossing on both sides,
continuous from the valve hole.
I haven't turned any of these nipples at all.
I made a mark with a white oil-based pen
on the inner end face of each nipple.
↑I recovered those four spokes.
The two spokes in the upper part of the image are the long ones for the right side,
and the two at the bottom are the short ones for the left side.
When I align the ends at the spoke head side
↑This is what happens at the threaded end.
There's individual variation in length between
the long spokes and the short spokes.
While my white marking technique isn't perfect,
if I were to use 12mm aluminum nipples
on the second and third spokes from the top,
the possibility exists that
the threaded portion would be visible from the nipple
once the wheel is fully built.
These spokes are somewhat short on both sides,
but the longer ones are just barely within acceptable length plus
they'll be under more tension than the original state, so
I reused them.
For the shorter ones, I'm preparing
black CX Sprint spokes that are slightly longer than this length.
Yesterday's rear wheel had a much larger difference
in length between left and right sides than today's front wheel,
a difference where "both lengths being correct" was impossible.
In such cases, the patterns are:
1. The long one is correct and the short one is slightly short
2. The short one is correct and the long one is slightly long
3. The long one is too short and the short one is out of the question
4. The short one is too long and the long one is out of the question
This was leaning toward pattern 3, closer to pattern 1,
and I had a rough time trusting the original CX-RAY length
for the shorter spokes I was changing to CX Sprint.
About the most interesting thing I noticed with this wheel.
The image above is the original left-side spoke,
the shorter spoke on the rotor mount side,
↑There are wear marks at the final crossing.
↑This is the spoke on the right side,
the longer spoke on the anti-rotor side,
which should theoretically be the low-tension side,
but this one actually has
more modest wear marks at the final crossing.
Without definitive proof,
I suspect that on the front wheel (which isn't the drive wheel),
the high-tension side experiencing more severe wear at the final crossing
might be due to the disc brake forces.
When accelerating from 0 to 30 km/h with pedaling,
the torsional stress on the rear wheel's right-side spokes
versus when braking from 30 to 0 km/h with the front brake alone,
the torsional stress on the front wheel's left-side spokes—
considering both at their maximum (zero-start grunt and hard braking)
and the time required to achieve each,
the front brake scenario might actually impose greater stress.
But that's just speculation from this one instance.
It's built.
I changed the rotor mount side to
CX Sprint.
I'll do the truing on the CX-RAY side later.
When it comes to truing, the front wheel is either way, fine—
the rear wheel requires it.
The hub looks unusually clean because,
while I didn't take original photos,
I cleaned it quite thoroughly.
Regarding the rims for both wheels this time,
I'd only noted that they were tubeless-compatible rims.
From actual measurement, the rim height is 35.2mm
and the internal width is 19.3mm,
so 35mm and 19mm would be appropriate.
The rims are the same front and rear, but
the front rim was lighter.
My practice is to put the lighter rim on the rear wheel
when building front and rear wheels with the same spoke count and rims,
but since I disassembled and rebuilt each separately
rather than taking them apart simultaneously,
this time it happened to work out this way.
Actual weight and weight difference? Like hell I'm telling you that
↑Ugh, this guy has a terrible attitude
My apologies for the wait! Please take a look at this image!
It's the rear rim!
It's the front rim!
↑Stop it!