This is somewhat unrelated to the title, but
there's a disc brake manufacturer called Formula in Italy.
Separately, there's a Formula brand in Taiwan that mainly produces hubs,
and since both Formula companies make disc brake hubs,
when you just hear "Formula disc hub" you can't tell which one it is.
Before disc road components became mainstream,
before Dura-Ace grade disc brakes and
Campagnolo disc brake components came out,
Colnago released a road bike with hydraulic disc brakes
as a flagship model (C59 DISK 2013),
and the brake lever was made by Formula.
Oh, and the same goes for Pinarello's Dogma, but for Italian brands
the spelling for disc is often DISK rather than DISC.
The old Formula had proprietary rotor standards—
165mm instead of 160mm, 4-hole instead of 6-hole (naturally requiring dedicated hubs as well)
but nowadays they've adopted the standard 160mm 6-hole format.
In those early days before de facto standards were established,
it seems manufacturers would toy with the idea that
"maybe our proprietary standard will become the industry norm."
With disc brake mounts too, the
"International Standard mount" where the mounting bolts are tightened from the side
didn't actually become international standard.
The "Post Mount" where bolts are tightened from above seems to work better,
probably because it's easier to correct misalignment between brake pad and rotor.
Among Post Mount-type mounts, there's something called "RR mount" with closer bolt spacing,
which was adopted on Trek brands (Trek and Gary Fisher) including Klein,
and Schwinn rear brakes and such,
but Hayes brakes made for RR mount are pretty rare,
and if you want to use them without that,
converting an RR mount to Post Mount is impossible so
you'd have to convert to International Standard mount instead.
If you're interested, try searching "Klein 22mm mount."
But this RR mount looks remarkably similar to
the Flat Mount used on current road disc brakes.
The difference is just whether "the frame has a through-hole
with threaded holes on the brake side" or not.
The legendary Jamis Diablo Carbon has
an RR mount in its incredibly narrow rear triangle,
and this frame has no choice but to use a Hayes brake made for RR mount.
You can install an adapter to convert to International Standard,
but the rear triangle is so narrow that there's no
disc brake caliper that can actually mount on that adapter
(since there's also a rim brake mount, using V-brakes is possible).
If you're interested, search "Jamis diablo 1998."
In these kinds of format wars, it's the users who suffer most.
Lately with press-fit BBs, trying to catch another wave
all kinds of manufacturers (mostly the big ones) are doing whatever they want,
and seriously, you guys need to cut it out already.
Another day of wheel building (and the rest).
Built a front wheel with a Kinlin XR26T rim.
Kinlin also makes the XR22T and XR31T, which are 24mm wide rims
(technically the XR26T is nominally 23.8mm wide),
and Tni sells the XR22T as the AL22W and XR31T as the AL31W,
but there's no Tni version of the XR26T.
That's because this XR26T is an exclusive model sold by Bike Hub Store dot com.
It arrives at our shop in BHS boxes too.
It's a tubeless-ready rim,
and the areas outside the brake zone have a sandblasted finish.
This is a custom specification—the XR22T and XR31T come standard
from the factory and in both BHS and Tni versions as
glossy (shiny smooth) finish.
24H, all Compte Italian-style lacing.
The 6-cross lacing is per the customer's request.
The hub is a Taiwan Formula OV-31,
but this is the version without the Formula logo on the hub shell.
↑This rubber part where the entire dust cap is tapered
is a specification used on Joytech hubs, so the manufacturer appears to be Joytech.
there's a disc brake manufacturer called Formula in Italy.
Separately, there's a Formula brand in Taiwan that mainly produces hubs,
and since both Formula companies make disc brake hubs,
when you just hear "Formula disc hub" you can't tell which one it is.
Before disc road components became mainstream,
before Dura-Ace grade disc brakes and
Campagnolo disc brake components came out,
Colnago released a road bike with hydraulic disc brakes
as a flagship model (C59 DISK 2013),
and the brake lever was made by Formula.
Oh, and the same goes for Pinarello's Dogma, but for Italian brands
the spelling for disc is often DISK rather than DISC.
The old Formula had proprietary rotor standards—
165mm instead of 160mm, 4-hole instead of 6-hole (naturally requiring dedicated hubs as well)
but nowadays they've adopted the standard 160mm 6-hole format.
In those early days before de facto standards were established,
it seems manufacturers would toy with the idea that
"maybe our proprietary standard will become the industry norm."
With disc brake mounts too, the
"International Standard mount" where the mounting bolts are tightened from the side
didn't actually become international standard.
The "Post Mount" where bolts are tightened from above seems to work better,
probably because it's easier to correct misalignment between brake pad and rotor.
Among Post Mount-type mounts, there's something called "RR mount" with closer bolt spacing,
which was adopted on Trek brands (Trek and Gary Fisher) including Klein,
and Schwinn rear brakes and such,
but Hayes brakes made for RR mount are pretty rare,
and if you want to use them without that,
converting an RR mount to Post Mount is impossible so
you'd have to convert to International Standard mount instead.
If you're interested, try searching "Klein 22mm mount."
But this RR mount looks remarkably similar to
the Flat Mount used on current road disc brakes.
The difference is just whether "the frame has a through-hole
with threaded holes on the brake side" or not.
The legendary Jamis Diablo Carbon has
an RR mount in its incredibly narrow rear triangle,
and this frame has no choice but to use a Hayes brake made for RR mount.
You can install an adapter to convert to International Standard,
but the rear triangle is so narrow that there's no
disc brake caliper that can actually mount on that adapter
(since there's also a rim brake mount, using V-brakes is possible).
If you're interested, search "Jamis diablo 1998."
In these kinds of format wars, it's the users who suffer most.
Lately with press-fit BBs, trying to catch another wave
all kinds of manufacturers (mostly the big ones) are doing whatever they want,
and seriously, you guys need to cut it out already.
Another day of wheel building (and the rest).
Built a front wheel with a Kinlin XR26T rim.
Kinlin also makes the XR22T and XR31T, which are 24mm wide rims
(technically the XR26T is nominally 23.8mm wide),
and Tni sells the XR22T as the AL22W and XR31T as the AL31W,
but there's no Tni version of the XR26T.
That's because this XR26T is an exclusive model sold by Bike Hub Store dot com.
It's a tubeless-ready rim,
and the areas outside the brake zone have a sandblasted finish.
This is a custom specification—the XR22T and XR31T come standard
from the factory and in both BHS and Tni versions as
glossy (shiny smooth) finish.
24H, all Compte Italian-style lacing.
The 6-cross lacing is per the customer's request.
The hub is a Taiwan Formula OV-31,
but this is the version without the Formula logo on the hub shell.
↑This rubber part where the entire dust cap is tapered
is a specification used on Joytech hubs, so the manufacturer appears to be Joytech.