Another day with wheels (and so on).
Continuing from yesterday.
I'm rebuilding the front wheel of the 303NSW.
Cognition hub, 24H, all-black CX-RAY, 4-cross reversed Italian lacing
There's some center offset.
Since this offset direction is the same as having tightened the low-tension side starting from a perfectly centered state,
the left-right spoke tension difference should be less than in the perfectly centered case,
but since the dishing factor is larger,
I can still tell that the right side deforms more when squeezing the final cross.
Unlike yesterday's rear wheel, the high-tension side was tensioned quite tight,
so if the rear wheel were rebuilt with black spokes
and there wasn't much complaint about the front wheel, going the budget route
with "centering + full lacing" would show enough difference from the original state.
But rebuilding it will be even better, so I'll do that.
The ZIPP tubeless rim's hump is a flat hump with such broad width that it hardly qualifies as a protrusion,
like the SMART ENVVE.
Regarding ZIPP's tubeless tape,
I wondered if removing tape that had been applied for so long that the adhesive had fully settled
would take the upper layer of this flat hump, but
↑this
↑this
↑this
Since there are no carbon fragments on the tape where it peeled off,
it must have already been missing originally. The same was true for the rear rim.
There doesn't seem to be any problem with tubeless rim function.
If the manufacturer applied the tape in that state, then it came that way from the factory.
The "DB" and "F" on the rim probably mean disk brake front rim,
unless they stand for Dragon Ball's Frieza.
The outer holes on this rim are large to accommodate nipple washers
and are positioned exactly at the rim's center width,
but the inner holes have some offset.
That offset doesn't seem to alternate strictly left and right,
but rather repeats between center and slightly offset.
That's clearly what I'm seeing.
In the image above, the three spots where I placed tape markers
appear to be: offset, center, offset.
Kishisylum rear rims have strong directionality in their drillings,
clearly showing left, center, left, center patterns,
making it impossible to assemble them backwards.
Since ZIPP specifically marks "DB F" on the rim,
they're conscious of the spoke angle difference from dishing, though not as much as rear wheels,
In that case, the center holes should align with rotor-side spokes
and the slightly-offset holes with non-rotor-side spokes.
Indeed, that's how it was assembled.
Just because holes are offset doesn't mean
"they're evenly distributed with no left-right distinction."
I was curious about this yesterday with the rear wheel,
so I also photographed the rear rim.
In the image above, the left hole is centered on the freewheel side,
and the right hole is slightly offset on the non-freewheel side.
↑freewheel side
↑non-freewheel side
To be honest, I was also looking for particularly obvious examples,
and even on the freewheel side you can see holes that barely lean away from center in the opposite direction from the non-freewheel side.
But still, overall, it clearly doesn't look symmetrical.
↑this is the front rim I built today.
There's a scale-like or seam-like lamination in the rim's center,
but what indicates the rim's true center isn't this lamination...
A scale just happens to sit on top of the actual boundary line,
making it appear that way.
When the scale lines are curved at the opposite phase,
I can see the seam-like center line.
Using that as reference, it still looks like
↑center holes and
↑slightly-offset holes—two types.
Since current ZIPP doesn't sell rims separately,
even if the rim has directional attributes,
there's no need to alert builders outside the company,
and thus there's no external manual documenting this specification.
The Cognition hub's flanges might be jagged for stress and aerodynamic reasons,
but there's also the advantage that it doesn't roll easily when placed on a table.
CX spokes had defects, so I tossed them out.
The workmanship near the start of the butting on the hub end is bulging sideways.
↑are they serious?
Out of 12 spokes from the bundle, 2 had defects—an extremely high rate that concerns me.
Built.
24H, half CX spokes, 4-cross reversed Italian lacing with cross-stitching.
If this were built in front of a customer,
unlike the original state, despite being centered,
the left-right deformation difference in the spokes is quite small without cross-stitching.
When squeezing the final cross, you can't distinguish left from right without looking at the wheel... well, that's an exaggeration.
If you squeeze hard, the non-rotor-side deformation is slightly larger and barely distinguishable.
But compared to the original state, the left-right difference is definitely extreme reduced.
Once you add the cross-stitching, left-right distinction becomes almost impossible.
Since CX spokes are thicker,
you can still tell by how they bite into your fingers,
but in terms of deformation alone, you'd have to say they're indistinguishable.
Conversely, if they're indistinguishable,
then CX spokes don't need cross-stitching (adding it makes almost no difference).
To belabor the point, don't they look like center and slightly-offset holes?
In the image above, the spoke extending toward the bottom must be non-rotor-side,
and indeed it is.
Regarding this hole offset specification, the caution is directed at fellow builders,
but how many actually put it to use is unclear.
Also, the customer asked me to weigh the rim,
but I have no intention of disclosing that as information for general consumers.
Since there's no separate rim sales,
I'm not freely sharing precious information that only comes from disassembly.
↑man, what a bad attitude
THANK YOU FOR WAITING!
We have equipped an aerobody
offering time savings of 30 seconds per hour
at 30 miles per hour (about 48km)! (in case of side movement)
Anyway, please view this image!
Front rim!
Rear rim!
↑STOOOOOOP!
Continuing from yesterday.
I'm rebuilding the front wheel of the 303NSW.
Cognition hub, 24H, all-black CX-RAY, 4-cross reversed Italian lacing
There's some center offset.
Since this offset direction is the same as having tightened the low-tension side starting from a perfectly centered state,
the left-right spoke tension difference should be less than in the perfectly centered case,
but since the dishing factor is larger,
I can still tell that the right side deforms more when squeezing the final cross.
Unlike yesterday's rear wheel, the high-tension side was tensioned quite tight,
so if the rear wheel were rebuilt with black spokes
and there wasn't much complaint about the front wheel, going the budget route
with "centering + full lacing" would show enough difference from the original state.
But rebuilding it will be even better, so I'll do that.
The ZIPP tubeless rim's hump is a flat hump with such broad width that it hardly qualifies as a protrusion,
like the SMART ENVVE.
Regarding ZIPP's tubeless tape,
I wondered if removing tape that had been applied for so long that the adhesive had fully settled
would take the upper layer of this flat hump, but
↑this
↑this
↑this
Since there are no carbon fragments on the tape where it peeled off,
it must have already been missing originally. The same was true for the rear rim.
There doesn't seem to be any problem with tubeless rim function.
If the manufacturer applied the tape in that state, then it came that way from the factory.
The "DB" and "F" on the rim probably mean disk brake front rim,
unless they stand for Dragon Ball's Frieza.
The outer holes on this rim are large to accommodate nipple washers
and are positioned exactly at the rim's center width,
but the inner holes have some offset.
That offset doesn't seem to alternate strictly left and right,
but rather repeats between center and slightly offset.
That's clearly what I'm seeing.
In the image above, the three spots where I placed tape markers
appear to be: offset, center, offset.
Kishisylum rear rims have strong directionality in their drillings,
clearly showing left, center, left, center patterns,
making it impossible to assemble them backwards.
Since ZIPP specifically marks "DB F" on the rim,
they're conscious of the spoke angle difference from dishing, though not as much as rear wheels,
In that case, the center holes should align with rotor-side spokes
and the slightly-offset holes with non-rotor-side spokes.
Indeed, that's how it was assembled.
Just because holes are offset doesn't mean
"they're evenly distributed with no left-right distinction."
I was curious about this yesterday with the rear wheel,
so I also photographed the rear rim.
In the image above, the left hole is centered on the freewheel side,
and the right hole is slightly offset on the non-freewheel side.
↑freewheel side
↑non-freewheel side
To be honest, I was also looking for particularly obvious examples,
and even on the freewheel side you can see holes that barely lean away from center in the opposite direction from the non-freewheel side.
But still, overall, it clearly doesn't look symmetrical.
↑this is the front rim I built today.
There's a scale-like or seam-like lamination in the rim's center,
but what indicates the rim's true center isn't this lamination...
A scale just happens to sit on top of the actual boundary line,
making it appear that way.
When the scale lines are curved at the opposite phase,
I can see the seam-like center line.
Using that as reference, it still looks like
↑center holes and
↑slightly-offset holes—two types.
Since current ZIPP doesn't sell rims separately,
even if the rim has directional attributes,
there's no need to alert builders outside the company,
and thus there's no external manual documenting this specification.
The Cognition hub's flanges might be jagged for stress and aerodynamic reasons,
but there's also the advantage that it doesn't roll easily when placed on a table.
CX spokes had defects, so I tossed them out.
The workmanship near the start of the butting on the hub end is bulging sideways.
↑are they serious?
Out of 12 spokes from the bundle, 2 had defects—an extremely high rate that concerns me.
Built.
24H, half CX spokes, 4-cross reversed Italian lacing with cross-stitching.
If this were built in front of a customer,
unlike the original state, despite being centered,
the left-right deformation difference in the spokes is quite small without cross-stitching.
When squeezing the final cross, you can't distinguish left from right without looking at the wheel... well, that's an exaggeration.
If you squeeze hard, the non-rotor-side deformation is slightly larger and barely distinguishable.
But compared to the original state, the left-right difference is definitely extreme reduced.
Once you add the cross-stitching, left-right distinction becomes almost impossible.
Since CX spokes are thicker,
you can still tell by how they bite into your fingers,
but in terms of deformation alone, you'd have to say they're indistinguishable.
Conversely, if they're indistinguishable,
then CX spokes don't need cross-stitching (adding it makes almost no difference).
To belabor the point, don't they look like center and slightly-offset holes?
In the image above, the spoke extending toward the bottom must be non-rotor-side,
and indeed it is.
Regarding this hole offset specification, the caution is directed at fellow builders,
but how many actually put it to use is unclear.
Also, the customer asked me to weigh the rim,
but I have no intention of disclosing that as information for general consumers.
Since there's no separate rim sales,
I'm not freely sharing precious information that only comes from disassembly.
↑man, what a bad attitude
THANK YOU FOR WAITING!
We have equipped an aerobody
offering time savings of 30 seconds per hour
at 30 miles per hour (about 48km)! (in case of side movement)
Anyway, please view this image!
Front rim!
Rear rim!
↑STOOOOOOP!