The previous article got pretty long as I kept writing, so I split it up.
These are the actual measured weights of the rim alone and the front wheel
from the Grail CB7 in the previous article.
24 spokes, all CX-RAY, with a weight difference of 270g between the rim alone and the complete front wheel.
↑This is a rim I built a while back—a シャーメン (Charman rim, with no holes on the outer edge except for the valve hole)
(→here)
This image is also posted at that link, but
↑this is the measured weight of the front wheel I'm showing for the first time today.
Like today's front wheel, it's 24 spokes with all CX-RAY (though black),
with a weight difference of 252g between the rim alone and the complete wheel.
Since this rim has greater height, the spokes are shorter,
and the hub is a Revo disc hub which is lighter than a Chris King
(by the specs, the Revo disc hub is 12g lighter)
the weight difference from the rim alone is less on this one.
The other day, I wrote about nominal weights (→here)
For the Shimano R9200 series Dura-Ace
C36 disc brake complete wheel front rim,
the manufacturer site listed the tubeless rim version at 620g
and the tubular rim version at 522g.
These two have the same hub, and the spoke length is either the same
or if different, the rim height is the same so there shouldn't be much difference,
and since the spoke count and gauge are the same,
the rim weight would need to differ by about 100g to make sense.
The tubular rim's nominal weight is listed as
519g in a different source from the manufacturer site,
and given the subtle difference suggests
these might be actual measured weights from different wheelsets,
it adds credibility that the ~520g figure isn't a typo.
The R9200 series hub probably also uses cup and cone bearings,
and if so, the hub weight shouldn't be dramatically lighter,
and the front hub's freewheel lightening isn't relevant here, so
considering the weight difference from the rim alone of those two front wheels at the beginning
(if the ~520g nominal weight is actually accurate)
it's pretty much certain that the R9270 C36 tubular rim weighs under 300g.
Anyway, in the linked article,
I wrote that the R9270 disc brake wheels
are "also usable with rim brake models,"
but this was copied verbatim from how it appeared on the manufacturer site at the time,
and I'd been suspicious about it even back then
so I had saved a web archive of it—
↑before
↑after
The wording "also usable with rim brake models"
has been removed.
What's puzzling is that if these were rim brake wheels,
there'd be no need to specifically write "also usable with rim brake models,"
so this phrasing was meant for the disc brake version,
and it might be a leftover from how things were planned during development.
These are the actual measured weights of the rim alone and the front wheel
from the Grail CB7 in the previous article.
24 spokes, all CX-RAY, with a weight difference of 270g between the rim alone and the complete front wheel.
↑This is a rim I built a while back—a シャーメン (Charman rim, with no holes on the outer edge except for the valve hole)
(→here)
This image is also posted at that link, but
↑this is the measured weight of the front wheel I'm showing for the first time today.
Like today's front wheel, it's 24 spokes with all CX-RAY (though black),
with a weight difference of 252g between the rim alone and the complete wheel.
Since this rim has greater height, the spokes are shorter,
and the hub is a Revo disc hub which is lighter than a Chris King
(by the specs, the Revo disc hub is 12g lighter)
the weight difference from the rim alone is less on this one.
The other day, I wrote about nominal weights (→here)
For the Shimano R9200 series Dura-Ace
C36 disc brake complete wheel front rim,
the manufacturer site listed the tubeless rim version at 620g
and the tubular rim version at 522g.
These two have the same hub, and the spoke length is either the same
or if different, the rim height is the same so there shouldn't be much difference,
and since the spoke count and gauge are the same,
the rim weight would need to differ by about 100g to make sense.
The tubular rim's nominal weight is listed as
519g in a different source from the manufacturer site,
and given the subtle difference suggests
these might be actual measured weights from different wheelsets,
it adds credibility that the ~520g figure isn't a typo.
The R9200 series hub probably also uses cup and cone bearings,
and if so, the hub weight shouldn't be dramatically lighter,
and the front hub's freewheel lightening isn't relevant here, so
considering the weight difference from the rim alone of those two front wheels at the beginning
(if the ~520g nominal weight is actually accurate)
it's pretty much certain that the R9270 C36 tubular rim weighs under 300g.
Anyway, in the linked article,
I wrote that the R9270 disc brake wheels
are "also usable with rim brake models,"
but this was copied verbatim from how it appeared on the manufacturer site at the time,
and I'd been suspicious about it even back then
so I had saved a web archive of it—
↑before
↑after
The wording "also usable with rim brake models"
has been removed.
What's puzzling is that if these were rim brake wheels,
there'd be no need to specifically write "also usable with rim brake models,"
so this phrasing was meant for the disc brake version,
and it might be a leftover from how things were planned during development.