Today it's J-wheels again (etc.).
Continuing from yesterday.
I'm rebuilding the rear wheel built with
a Mavic Record Mondial gold rim.
A 121mm width Record hub with the earth mark, measured
36H star stainless 15-17-15 butted spokes
assembled in 88 (JIS style) lacing pattern.
The tension had lost and there was some lateral wobble,
though the centering was only slightly off toward the right.
If I had built a wheel with this rim, this hub, these spokes, and this lacing pattern
and left it stationary for 40 years,
it might end up in the same condition.
Unlike the front wheel, the marking on the hub body
and the label on the rim were in phase,
but the rim label was oriented backwards.
The measured weight. It was the same as the front wheel,
though occasionally the scale displays 269g,
so this one might be slightly lighter.
When I build front and rear wheels on the same rim with the same hole count,
I put the lighter one on the rear,
but with already-assembled front and rear wheels,
I usually don't disassemble both wheels simultaneously
just to confirm and swap them.
It's built.
36H freewheel side Starbrite 15 plain
non-freewheel side NJS Aero Starbrite
in 48 Italian lacing pattern (changed from JIS style)
with spoke lacing ties.
In keirin wheels, it seems to be a trend in a certain school or sect
to "intentionally build wheels with slightly loose tension and then tie them.\"
Even Araya's 16B gold rim, which is a single-make current production item for keirin,
doesn't accept high tension as much as
recent aluminum rims.
But since the Record Mondial rim
accepts even less tension,
this rear wheel ended up having a feel similar to
\"a slightly loosely-built 16B gold with spoke ties.\"
The differences are that, despite being a 121mm width freewheel hub,
the flange diameter is still noticeably larger
compared to a single-thread-cut fixed gear hub, and
whereas keirin specifies 36H 88 lacing,
I did left-right different-diameter 48 lacing
with a spoke weight difference of less than 5%.
By the way, with the 15-based
Starbrite butted spokes for keirin,
there are both round-section and flat (aero) section versions,
and actually the round-section ones
have less spoke weight and are lighter.
So for a fixed-gear hub with single-thread-cut,
using aero on the freewheel side and round on the non-freewheel side—
I wonder if that's OK regulation-wise.
Continuing from yesterday.
I'm rebuilding the rear wheel built with
a Mavic Record Mondial gold rim.
A 121mm width Record hub with the earth mark, measured
36H star stainless 15-17-15 butted spokes
assembled in 88 (JIS style) lacing pattern.
The tension had lost and there was some lateral wobble,
though the centering was only slightly off toward the right.
If I had built a wheel with this rim, this hub, these spokes, and this lacing pattern
and left it stationary for 40 years,
it might end up in the same condition.
Unlike the front wheel, the marking on the hub body
and the label on the rim were in phase,
but the rim label was oriented backwards.
The measured weight. It was the same as the front wheel,
though occasionally the scale displays 269g,
so this one might be slightly lighter.
When I build front and rear wheels on the same rim with the same hole count,
I put the lighter one on the rear,
but with already-assembled front and rear wheels,
I usually don't disassemble both wheels simultaneously
just to confirm and swap them.
It's built.
36H freewheel side Starbrite 15 plain
non-freewheel side NJS Aero Starbrite
in 48 Italian lacing pattern (changed from JIS style)
with spoke lacing ties.
In keirin wheels, it seems to be a trend in a certain school or sect
to "intentionally build wheels with slightly loose tension and then tie them.\"
Even Araya's 16B gold rim, which is a single-make current production item for keirin,
doesn't accept high tension as much as
recent aluminum rims.
But since the Record Mondial rim
accepts even less tension,
this rear wheel ended up having a feel similar to
\"a slightly loosely-built 16B gold with spoke ties.\"
The differences are that, despite being a 121mm width freewheel hub,
the flange diameter is still noticeably larger
compared to a single-thread-cut fixed gear hub, and
whereas keirin specifies 36H 88 lacing,
I did left-right different-diameter 48 lacing
with a spoke weight difference of less than 5%.
By the way, with the 15-based
Starbrite butted spokes for keirin,
there are both round-section and flat (aero) section versions,
and actually the round-section ones
have less spoke weight and are lighter.
So for a fixed-gear hub with single-thread-cut,
using aero on the freewheel side and round on the non-freewheel side—
I wonder if that's OK regulation-wise.