Another day with wheels (and so on).
Continuing from the other day.
I built a rear wheel with a ZIPP 404 tubular rim and
an Extralight hub.
Cyber rear hub 24H
Half-CX sprint equivalent to a forced 4-cross lacing.
The customer wanted full CX-RAY,
but since this hub has a wide left flange and the non-freebody side uses radial lacing,
if I did equal-diameter lacing on both sides,
the tension on the non-freebody side would become slack, and there's
nothing I can do about it
（it's a lacing pattern where I can't compensate for low tension with spoke tie-in adjustment），
so I went with half-CX sprint instead.
I'm weaving the final cross on the freebody side,
and since the spokes are silver and flat-profiled,
there's no worry about clicking noise at the contact points.
For the Enduro bearings,
the specification states that ABEC 5 bearings are installed.
ABEC (Annular Bearing Engineering Committee)
is an acronym defined by an American bearing standards organization.
The grades are only odd numbers: 9, 7, 5, 3, 1,
and the dimensional accuracy of the spheres' roundness
improves as the number gets larger.
There also exist bearings claiming ABEC 11,
which exceed ABEC 9 without official standards body approval.
In the inline skating world,
ABEC is something people obsess over
（it's like "if it's not a 9 or 7, it's not a bearing"）.
However, ABEC is only an indicator related to
the dimensional accuracy of the balls themselves,
so it doesn't account for bearing lubricity or material hardness.
ABEC 5 is a grade
that's barely worth mentioning,
but these bearings are from Enduro's
ceramic bearing brand,
"Zero Ceramic" bearings.
Perhaps with ceramic bearing balls,
achieving "ABEC 5 precision!" is actually
pretty impressive in its own right.
Continuing from the other day.
I built a rear wheel with a ZIPP 404 tubular rim and
an Extralight hub.
Cyber rear hub 24H
Half-CX sprint equivalent to a forced 4-cross lacing.
The customer wanted full CX-RAY,
but since this hub has a wide left flange and the non-freebody side uses radial lacing,
if I did equal-diameter lacing on both sides,
the tension on the non-freebody side would become slack, and there's
nothing I can do about it
（it's a lacing pattern where I can't compensate for low tension with spoke tie-in adjustment），
so I went with half-CX sprint instead.
I'm weaving the final cross on the freebody side,
and since the spokes are silver and flat-profiled,
there's no worry about clicking noise at the contact points.
For the Enduro bearings,
the specification states that ABEC 5 bearings are installed.
ABEC (Annular Bearing Engineering Committee)
is an acronym defined by an American bearing standards organization.
The grades are only odd numbers: 9, 7, 5, 3, 1,
and the dimensional accuracy of the spheres' roundness
improves as the number gets larger.
There also exist bearings claiming ABEC 11,
which exceed ABEC 9 without official standards body approval.
In the inline skating world,
ABEC is something people obsess over
（it's like "if it's not a 9 or 7, it's not a bearing"）.
However, ABEC is only an indicator related to
the dimensional accuracy of the balls themselves,
so it doesn't account for bearing lubricity or material hardness.
ABEC 5 is a grade
that's barely worth mentioning,
but these bearings are from Enduro's
ceramic bearing brand,
"Zero Ceramic" bearings.
Perhaps with ceramic bearing balls,
achieving "ABEC 5 precision!" is actually
pretty impressive in its own right.