Working on wheels again today (and so on).
Building the rear wheel with an SES3.4 rim using a DT 240 hub,
which has smaller flanges than the Chris King R45 hub
(meaning spoke length tends to be longer).
After calculating spoke length,
the non-drive side came out to 273mm.
With the Chris King hub it was
271mm.
A 2mm difference is quite tight, so
I gave up on reusing the spokes and
considered using new CX-RAY spokes
at the length needed for a 6-spoke non-drive side build.
But I was curious about the pre-rounding length,
so I investigated.
When the final calculation is 273mm,
that's anywhere between 272.50mm and 273.49mm.
If it turned out closer to 272.50mm,
I'd reuse the spokes and,
just for this case, use 271mm.
If the pre-rounding value was 273mm or more,
I'd give up.
So I checked and got 272.54mm.
In other words, if the theoretical value had been
just 0.05mm shorter,
it would have calculated to 272mm.
It's not my preferred length,
but I noticed that even on ENVE's stock wheels,
the final state sometimes has spokes pulled back
about 1mm from the nipple outer edge,
and given that the internal nipple design has a shallower
thread pocket compared to standard nipples,
ensuring sufficient thread engagement is possible.
So I decided to do a 4-spoke build on the non-drive side
reusing the 271mm spokes.
Built it.
DT 240 hub, 24H, black semi-comp, 4-4 lacing.
I'll do the truing later.
This time I swapped out SES2.2 tubeless for SES3.4 tubular,
but what surprised me wasn't that the tubeless rim was heavy,
but rather how light the tubular rim was
(though the rims might not be from exactly the same era).
↑This is the SES2.2 rim from this build.
It has the central groove for seating tubeless tire beads
and the humps (side protrusions that hold tire beads)
attached.
Back when old SES WO rims
had simple flat rimtape surfaces,
there were examples where front and rear rims
differed by 1mm in internal width
(front being wider),
and in those cases, the stretch-band-type rimtape
included with the rim
was also precisely 1mm different in width—
that's how thorough they were.
Not to say the current approach is lazy,
but with the SES2.2 rim this time,
the A2.2 25mm-high rim
differs between front and rear only in spoke hole count;
all other dimensions are the same.
The SES3.4 rims, on the other hand,
come as the A35 (35mm-high) rim
and the A45 (45mm-high) rim.
As for specific weights,
I'm not telling.
↑wow this guy's got bad vibes
Sorry for the wait! Please take a look at this image!
A2.2 TL front rim!
A2.2 TL rear rim!
A35 TU rim!
A45 TU rim!
↑Stop it already!
Building the rear wheel with an SES3.4 rim using a DT 240 hub,
which has smaller flanges than the Chris King R45 hub
(meaning spoke length tends to be longer).
After calculating spoke length,
the non-drive side came out to 273mm.
With the Chris King hub it was
271mm.
A 2mm difference is quite tight, so
I gave up on reusing the spokes and
considered using new CX-RAY spokes
at the length needed for a 6-spoke non-drive side build.
But I was curious about the pre-rounding length,
so I investigated.
When the final calculation is 273mm,
that's anywhere between 272.50mm and 273.49mm.
If it turned out closer to 272.50mm,
I'd reuse the spokes and,
just for this case, use 271mm.
If the pre-rounding value was 273mm or more,
I'd give up.
So I checked and got 272.54mm.
In other words, if the theoretical value had been
just 0.05mm shorter,
it would have calculated to 272mm.
It's not my preferred length,
but I noticed that even on ENVE's stock wheels,
the final state sometimes has spokes pulled back
about 1mm from the nipple outer edge,
and given that the internal nipple design has a shallower
thread pocket compared to standard nipples,
ensuring sufficient thread engagement is possible.
So I decided to do a 4-spoke build on the non-drive side
reusing the 271mm spokes.
Built it.
DT 240 hub, 24H, black semi-comp, 4-4 lacing.
I'll do the truing later.
This time I swapped out SES2.2 tubeless for SES3.4 tubular,
but what surprised me wasn't that the tubeless rim was heavy,
but rather how light the tubular rim was
(though the rims might not be from exactly the same era).
↑This is the SES2.2 rim from this build.
It has the central groove for seating tubeless tire beads
and the humps (side protrusions that hold tire beads)
attached.
Back when old SES WO rims
had simple flat rimtape surfaces,
there were examples where front and rear rims
differed by 1mm in internal width
(front being wider),
and in those cases, the stretch-band-type rimtape
included with the rim
was also precisely 1mm different in width—
that's how thorough they were.
Not to say the current approach is lazy,
but with the SES2.2 rim this time,
the A2.2 25mm-high rim
differs between front and rear only in spoke hole count;
all other dimensions are the same.
The SES3.4 rims, on the other hand,
come as the A35 (35mm-high) rim
and the A45 (45mm-high) rim.
As for specific weights,
I'm not telling.
↑wow this guy's got bad vibes
Sorry for the wait! Please take a look at this image!
A2.2 TL front rim!
A2.2 TL rear rim!
A35 TU rim!
A45 TU rim!
↑Stop it already!