Wheels again today (and so on).
With an Araya RT-520, a double-wall rim, and
a Gran Compe small-flange fixed gear hub
I built the front wheel.
↑Focus on the rim
↑Focus on the hub
Still getting used to the digital camera—it's kind of a pain to use...
Anyway, 32H, full competition-grade 6-cross Italian lacing
with no cross-lacing for the last segment.
This RT-520 is a double-wall, square-profile rim
with a shallow rim height, so the bead hook takes up
about half of the rim's sidewall height.
Which means the hollow pipe section of the rim excluding the bead hook—
the part you'd consider if treating it like a tubular rim—
is even lower, so if spoke threads were to protrude from the nipple,
and the rim tape were to flex inward, the spokes could potentially
tear through the tape. The inner and outer walls
are that close to each other.
For this hub and rim combination,
the calculated spoke length came out to 300.52mm,
which automatically rounds to 301mm,
but if the calculated length were just 0.05mm shorter
it would be specified as 300mm.
In cases like this, spoke cutters can usually achieve
0.5mm increments, so I'd cut to 300.5mm,
but this time due to the rim situation, I used 300mm spokes
(I happened to have that length in stock anyway).
At this rate, if I'd gone with 301mm, there would definitely be
places where the thread pitch would protrude from the nipple end face.
With an Araya RT-520, a double-wall rim, and
a Gran Compe small-flange fixed gear hub
I built the front wheel.
↑Focus on the rim
↑Focus on the hub
Still getting used to the digital camera—it's kind of a pain to use...
Anyway, 32H, full competition-grade 6-cross Italian lacing
with no cross-lacing for the last segment.
This RT-520 is a double-wall, square-profile rim
with a shallow rim height, so the bead hook takes up
about half of the rim's sidewall height.
Which means the hollow pipe section of the rim excluding the bead hook—
the part you'd consider if treating it like a tubular rim—
is even lower, so if spoke threads were to protrude from the nipple,
and the rim tape were to flex inward, the spokes could potentially
tear through the tape. The inner and outer walls
are that close to each other.
For this hub and rim combination,
the calculated spoke length came out to 300.52mm,
which automatically rounds to 301mm,
but if the calculated length were just 0.05mm shorter
it would be specified as 300mm.
In cases like this, spoke cutters can usually achieve
0.5mm increments, so I'd cut to 300.5mm,
but this time due to the rim situation, I used 300mm spokes
(I happened to have that length in stock anyway).
At this rate, if I'd gone with 301mm, there would definitely be
places where the thread pitch would protrude from the nipple end face.