This is a supplement to my previous post.
The wheel model name in that article was WAKE6560, but
the naming convention is pet name + numbers,
where the numbers indicate the rim heights
with a 5mm difference between them—
the higher and lower values.
Looking at other models: ALTA3532, CODA9590,
DUAL5550, GRIT4540,
it seems like the higher number comes first,
but MACH7580 and PEAK4550 are reversed,
which is a bit frustrating.
Other than that, MACH7580 TS (tri-spoke)
is a front-wheel-only model
with a 75/80mm rim height three-spoke wheel,
and BLUR633 V3 is a disc wheel
(meaning the disc-style wheel) for disc brakes
and comes only as a rear wheel.
V3 stands for Version 3.
According to ETRTO standards, there's a rim size where
the measurement between opposite sides of the rim's outer edge
(where the rim tape sits)
is 622mm—called a WO rim,
and when you mount a tire and inflate it,
if the tire's outer diameter is roughly 700mm,
using 1mm = 1C, it's called 700C.
The 622 number marked on rims and tires refers to this.
That said, on a 622mm rim,
tire widths of about 35–38C are what give you
an outer diameter of exactly 700mm,
while a 25C tire only reaches about 675mm.
For tubular rims, the length defined by ETRTO
for the surfaces where you apply rim cement
or double-sided tape is 632mm.
This is also called 700C tubular,
but the tire's outer diameter is about 665mm with a 21C tire.
When tire widths have the same nominal size
(for example, both 23C),
tubular tires have a smaller outer diameter than WO,
and regardless of tire width, tubular rims
have their brake zones positioned more toward the outer edge.
In normal situations, this means the brake shoe position sits higher.
ETRTO defines tubular rim size as 632mm,
but occasionally you'll see rims marked 633mm.
Since tubular tires don't need to match
rim diameters as precisely as WO tires do,
that marking probably works fine too.
So I initially thought the number in the BLUR633 V3 model name
on the disc wheel at Princeton
referred to 633mm, which is the minor interpretation
for tubulars.
Campagnolo makes a Bora WTO77,
a rim-brake wheel for the front only,
with a tubeless rim format exclusively.
Its counterpart, the Bora Ultra TT,
a disc wheel (the disc-style kind, just to be clear),
comes rear-wheel only in tubular format,
so you're stuck using them as front tubeless, rear tubular.
I briefly wondered if Princeton was doing
something similar, but since Princeton doesn't make tubular models at all,
suddenly switching to tubular-only on the rear wheel
wouldn't make sense.
After checking, it turned out to be tubeless rim format only.
The 633mm refers to the outer diameter including
the rim's tire hook section—
basically, the diameter of the circle occupied by the wheel
when viewed straight from the side.
Addendum: The red text above has a correction.
The PEAK4550 and ALTA3532 do have
tubular rim options as of when I wrote this post.
By the way, Tactic Racing is a hub brand,
but so far as hub sets go,
they've only released the TR01 model—a new brand.
Yet the hub sections of both the MACH7580 TS three-spoke wheel
and BLUR633 V3 have
Tactic-made hubs installed.
Also, when a customer inquired with Tactic,
the wheel was being shipped from Princeton,
which suggests that Tactic might be a secondary brand of Princeton.
The wheel model name in that article was WAKE6560, but
the naming convention is pet name + numbers,
where the numbers indicate the rim heights
with a 5mm difference between them—
the higher and lower values.
Looking at other models: ALTA3532, CODA9590,
DUAL5550, GRIT4540,
it seems like the higher number comes first,
but MACH7580 and PEAK4550 are reversed,
which is a bit frustrating.
Other than that, MACH7580 TS (tri-spoke)
is a front-wheel-only model
with a 75/80mm rim height three-spoke wheel,
and BLUR633 V3 is a disc wheel
(meaning the disc-style wheel) for disc brakes
and comes only as a rear wheel.
V3 stands for Version 3.
According to ETRTO standards, there's a rim size where
the measurement between opposite sides of the rim's outer edge
(where the rim tape sits)
is 622mm—called a WO rim,
and when you mount a tire and inflate it,
if the tire's outer diameter is roughly 700mm,
using 1mm = 1C, it's called 700C.
The 622 number marked on rims and tires refers to this.
That said, on a 622mm rim,
tire widths of about 35–38C are what give you
an outer diameter of exactly 700mm,
while a 25C tire only reaches about 675mm.
For tubular rims, the length defined by ETRTO
for the surfaces where you apply rim cement
or double-sided tape is 632mm.
This is also called 700C tubular,
but the tire's outer diameter is about 665mm with a 21C tire.
When tire widths have the same nominal size
(for example, both 23C),
tubular tires have a smaller outer diameter than WO,
and regardless of tire width, tubular rims
have their brake zones positioned more toward the outer edge.
In normal situations, this means the brake shoe position sits higher.
ETRTO defines tubular rim size as 632mm,
but occasionally you'll see rims marked 633mm.
Since tubular tires don't need to match
rim diameters as precisely as WO tires do,
that marking probably works fine too.
So I initially thought the number in the BLUR633 V3 model name
on the disc wheel at Princeton
referred to 633mm, which is the minor interpretation
for tubulars.
Campagnolo makes a Bora WTO77,
a rim-brake wheel for the front only,
with a tubeless rim format exclusively.
Its counterpart, the Bora Ultra TT,
a disc wheel (the disc-style kind, just to be clear),
comes rear-wheel only in tubular format,
so you're stuck using them as front tubeless, rear tubular.
I briefly wondered if Princeton was doing
something similar, but since Princeton doesn't make tubular models at all,
suddenly switching to tubular-only on the rear wheel
wouldn't make sense.
After checking, it turned out to be tubeless rim format only.
The 633mm refers to the outer diameter including
the rim's tire hook section—
basically, the diameter of the circle occupied by the wheel
when viewed straight from the side.
Addendum: The red text above has a correction.
The PEAK4550 and ALTA3532 do have
tubular rim options as of when I wrote this post.
By the way, Tactic Racing is a hub brand,
but so far as hub sets go,
they've only released the TR01 model—a new brand.
Yet the hub sections of both the MACH7580 TS three-spoke wheel
and BLUR633 V3 have
Tactic-made hubs installed.
Also, when a customer inquired with Tactic,
the wheel was being shipped from Princeton,
which suggests that Tactic might be a secondary brand of Princeton.