Another day with wheels (and so on).
I built a disc brake front wheel with AX Lightness Ultra 25T (25mm deep tubular) rims.
The rim sidewalls have no special treatment — they're rim brake rims —
but I managed to get two 24H rim singles
even though they weren't stripped from a complete wheelset pair with 20H front and 24H rear.
How I got them is unclear.
Maybe they sell them like this normally in their home country,
but I just don't know.
ExtraLight CyberFront Front Hub (※) 24H
Black half CX sprint straight, forced 2-cross lacing both sides.
※Without spacing, "CyberFront" is the official hub name,
so writing it as "CyberFront Front Hub" isn't wrong.
Strictly speaking, it's the CyberFront SPD-3 model.
Apart from complete wheelsets, it has fairly high/low flanges,
so I considered going full CX-RAY for everything, but
I'm glad I made the disc mount side CX Sprint instead —
I confirmed this after stress-testing during final spoke tension adjustment.
The final crossing isn't woven on either side.
Initially I wove both sides and did a trial assembly,
but the rim uses internal nipples with small holes on the outer edge,
and if a spoke angles even slightly off-true,
the tool for turning the internal nipple
grinds against the rim hole edge.
On the right side with the small-diameter flange where final crossing comes very close to the hub flange,
even though CX-RAY has quite thin butted sections,
the spoke orientation coming from the inner flange hole is so tight
that I judged it would be severe — not impossible to build, but harsh —
so I didn't weave it.
I thought I might be able to weave the left side with the large-diameter flange,
but the spoke orientation there is also too tight,
so I judged it sounder not to weave it.
If this were a rim for generic nipples using the inner edge,
the nipples themselves have a ball-joint-like structure that
would absorb spoke orientation variance,
so I could have and would have woven both sides.
Compared to all-CX-RAY, using half CX Sprint adds
about 11.98g, roughly 12g by calculation,
but if a front wheel built with all-CX-RAY and
a front wheel built with half CX Sprint
existed side by side,
the 12g difference in the spoke section wouldn't be noticeable by feel,
but the half CX Sprint would feel stiffer somehow,
with less difference in behavior between sides —
that I think would likely be noticeable,
so in weighing the factors, half CX Sprint
seems like the better choice overall.
The result is I had to give up on achieving
a "front wheel in the 300g range."
I built a disc brake front wheel with AX Lightness Ultra 25T (25mm deep tubular) rims.
The rim sidewalls have no special treatment — they're rim brake rims —
but I managed to get two 24H rim singles
even though they weren't stripped from a complete wheelset pair with 20H front and 24H rear.
How I got them is unclear.
Maybe they sell them like this normally in their home country,
but I just don't know.
ExtraLight CyberFront Front Hub (※) 24H
Black half CX sprint straight, forced 2-cross lacing both sides.
※Without spacing, "CyberFront" is the official hub name,
so writing it as "CyberFront Front Hub" isn't wrong.
Strictly speaking, it's the CyberFront SPD-3 model.
Apart from complete wheelsets, it has fairly high/low flanges,
so I considered going full CX-RAY for everything, but
I'm glad I made the disc mount side CX Sprint instead —
I confirmed this after stress-testing during final spoke tension adjustment.
The final crossing isn't woven on either side.
Initially I wove both sides and did a trial assembly,
but the rim uses internal nipples with small holes on the outer edge,
and if a spoke angles even slightly off-true,
the tool for turning the internal nipple
grinds against the rim hole edge.
On the right side with the small-diameter flange where final crossing comes very close to the hub flange,
even though CX-RAY has quite thin butted sections,
the spoke orientation coming from the inner flange hole is so tight
that I judged it would be severe — not impossible to build, but harsh —
so I didn't weave it.
I thought I might be able to weave the left side with the large-diameter flange,
but the spoke orientation there is also too tight,
so I judged it sounder not to weave it.
If this were a rim for generic nipples using the inner edge,
the nipples themselves have a ball-joint-like structure that
would absorb spoke orientation variance,
so I could have and would have woven both sides.
Compared to all-CX-RAY, using half CX Sprint adds
about 11.98g, roughly 12g by calculation,
but if a front wheel built with all-CX-RAY and
a front wheel built with half CX Sprint
existed side by side,
the 12g difference in the spoke section wouldn't be noticeable by feel,
but the half CX Sprint would feel stiffer somehow,
with less difference in behavior between sides —
that I think would likely be noticeable,
so in weighing the factors, half CX Sprint
seems like the better choice overall.
The result is I had to give up on achieving
a "front wheel in the 300g range."