Another day with wheels (and so on).
Wait, so I can build wheels other than Nomu Lab Wheel No. 5?
Awesome.
I received a Campagnolo Berlin 36 rim from a customer.
The spoke hole count is 36H, but the "36" in the rim model name has nothing to do with spoke holes—
it refers to "the host city and year of the Summer Olympics,"
so it means Berlin Olympics, 1936.
Campagnolo rims have stickers that are placed so the lettering reverses at opposite sides,
almost at 180°, on some models,
but this rim doesn't have that, so there's no need to worry about left-right orientation.
I'll use a current Record Pista hub.
I said "current Record Pista," but among the component breakdown—
crankset, BB, headset, and front/rear hubs—
the hubs haven't appeared in Campagnolo's catalog since the 2015 model.
On the manufacturer website, only the front hub is listed.
The end nuts have that satin finish (→here),
and the thread pitch of the hub shaft and nut differs from other manufacturers.
Long ago, there was an Italian manufacturer called OMAS (オマス)
that made headsets, BBs, hubs, and such.
They made Campagnolo-compatible titanium BB shafts, hub shafts, and
brake pivot bolts.
Before, that was essentially the only way to get a titanium shaft
for a Campagnolo hub.
Or... (to be continued).
The rear hub has single-sided threading with a locknut recess.
Since this hub is based on the C Record hub,
the details of its construction follow that,
and the raise around the grease port at the center of the hub shell has marking that serves as a reference for orientation.
Even without this, the single-sided threading determines the orientation anyway.
Unlike the rear hub, the front hub is based on a 9-speed era Record hub
and has no marking on the hub shell to distinguish left from right, nor any marking on the grease port cover.
The customer can read tangent lacing, so even if I build it with Italian lacing,
they wouldn't install it backwards.
However, since they requested radial lacing—which the manufacturer prohibits—
the only reference for left-right orientation became the rim label.
The flange holes on the rear hub use the same machining as C Record and later hubs,
but the front hub is different for some reason.
The flange holes are clearly offset inward relative to the flange,
which suggests they were conscious of radial lacing being used.
Some people might think the front and rear hubs are from different eras,
but this is correct.
↑This is the 9-speed era Record front hub that serves as the base for the Record Pista front hub.
Heh heh, look at that subtly waisted hub shell...
This thing's got me going
On this hub, the flange holes have "Record hub finish."
So I'd like to say the Record Pista front hub is a shortcut, but
the spoke nipple seating for 14-gauge spokes is better than on the rear hub,
and the feel when building is solid and crisp.
This era hub came in steel shaft specs, but
this is an alternate version with a titanium shaft, and the box color is different too.
And it has a Campagnolo laser marking on only one end.
Besides OMAS, the way to get a Record hub with a titanium shaft
was to "just buy a hub that came with titanium from the start."
Built.
The front wheel is Record Pista 36H, all-competition reverse-spoke radial lacing,
and the rear wheel is Record Pista 36H, all-competition Italian lacing (4x6).
With a locknut recess as shallow as on a fixed-gear rear hub,
I normally wouldn't use different-diameter or different-count lacing,
but based on this hub's dimensions, I thought it was necessary, so I did it.
Also, if it were 32H, I probably wouldn't have.
I was torn between doing super-rare 6x8 lacing,
but I went with 4x6 lacing instead.
Since the left and right sides use the same spoke,
if the first ST on the freewheel side is greater than the fixed side,
the second ST will also be freewheel side > fixed side.
The relationship between the first ST and second ST isn't a linear proportion, so
if, say, the first ST on the freewheel side is 1.1 times the fixed side,
it doesn't mean the second ST difference becomes 1.1 times as well.
But you can compare which is larger.
When the wheel center is true,
if the first ST has freewheel side >> fixed side,
the second ST would be freewheel side >>>> > fixed side—
while the magnitude of the difference is different, the relative order doesn't reverse.
In this rear wheel, even with 4x6 lacing,
the fixed side ended up with lower tension,
but I believe it was better than doing equal-count lacing on both sides.
Wait, so I can build wheels other than Nomu Lab Wheel No. 5?
Awesome.
I received a Campagnolo Berlin 36 rim from a customer.
The spoke hole count is 36H, but the "36" in the rim model name has nothing to do with spoke holes—
it refers to "the host city and year of the Summer Olympics,"
so it means Berlin Olympics, 1936.
Campagnolo rims have stickers that are placed so the lettering reverses at opposite sides,
almost at 180°, on some models,
but this rim doesn't have that, so there's no need to worry about left-right orientation.
I'll use a current Record Pista hub.
I said "current Record Pista," but among the component breakdown—
crankset, BB, headset, and front/rear hubs—
the hubs haven't appeared in Campagnolo's catalog since the 2015 model.
On the manufacturer website, only the front hub is listed.
The end nuts have that satin finish (→here),
and the thread pitch of the hub shaft and nut differs from other manufacturers.
Long ago, there was an Italian manufacturer called OMAS (オマス)
that made headsets, BBs, hubs, and such.
They made Campagnolo-compatible titanium BB shafts, hub shafts, and
brake pivot bolts.
Before, that was essentially the only way to get a titanium shaft
for a Campagnolo hub.
Or... (to be continued).
The rear hub has single-sided threading with a locknut recess.
Since this hub is based on the C Record hub,
the details of its construction follow that,
and the raise around the grease port at the center of the hub shell has marking that serves as a reference for orientation.
Even without this, the single-sided threading determines the orientation anyway.
Unlike the rear hub, the front hub is based on a 9-speed era Record hub
and has no marking on the hub shell to distinguish left from right, nor any marking on the grease port cover.
The customer can read tangent lacing, so even if I build it with Italian lacing,
they wouldn't install it backwards.
However, since they requested radial lacing—which the manufacturer prohibits—
the only reference for left-right orientation became the rim label.
The flange holes on the rear hub use the same machining as C Record and later hubs,
but the front hub is different for some reason.
The flange holes are clearly offset inward relative to the flange,
which suggests they were conscious of radial lacing being used.
Some people might think the front and rear hubs are from different eras,
but this is correct.
↑This is the 9-speed era Record front hub that serves as the base for the Record Pista front hub.
This thing's got me going
On this hub, the flange holes have "Record hub finish."
So I'd like to say the Record Pista front hub is a shortcut, but
the spoke nipple seating for 14-gauge spokes is better than on the rear hub,
and the feel when building is solid and crisp.
This era hub came in steel shaft specs, but
this is an alternate version with a titanium shaft, and the box color is different too.
And it has a Campagnolo laser marking on only one end.
Besides OMAS, the way to get a Record hub with a titanium shaft
was to "just buy a hub that came with titanium from the start."
Built.
The front wheel is Record Pista 36H, all-competition reverse-spoke radial lacing,
and the rear wheel is Record Pista 36H, all-competition Italian lacing (4x6).
With a locknut recess as shallow as on a fixed-gear rear hub,
I normally wouldn't use different-diameter or different-count lacing,
but based on this hub's dimensions, I thought it was necessary, so I did it.
Also, if it were 32H, I probably wouldn't have.
I was torn between doing super-rare 6x8 lacing,
but I went with 4x6 lacing instead.
Since the left and right sides use the same spoke,
if the first ST on the freewheel side is greater than the fixed side,
the second ST will also be freewheel side > fixed side.
The relationship between the first ST and second ST isn't a linear proportion, so
if, say, the first ST on the freewheel side is 1.1 times the fixed side,
it doesn't mean the second ST difference becomes 1.1 times as well.
But you can compare which is larger.
When the wheel center is true,
if the first ST has freewheel side >> fixed side,
the second ST would be freewheel side >>>> > fixed side—
while the magnitude of the difference is different, the relative order doesn't reverse.
In this rear wheel, even with 4x6 lacing,
the fixed side ended up with lower tension,
but I believe it was better than doing equal-count lacing on both sides.