Another day of wheel building (and so on).
Built a rear wheel with Crest MK3 rim.
FH-CX75 28H black half-comp 4-cross JIS lacing with rim tape.
This CX75 hub, the rear hub only, is marked as "limited stock,"
which means once it's gone, that's it.
There's no reason to discontinue the rear hub alone,
so it's quite possible the front hub will eventually follow suit.
Shimano's CX series brakes—
the top-tier cantilever model was BR-CX70,
and the lower-tier model was CX-50.
BR-CX70 was discontinued and dropped from the catalog in 2017.
The difference between CX70 and 50 is the finish on the body (70 has gray anodize to match Ultegra)
and the brake shoes—whether they use booster plus cartridge shoes or solid shoes—but
whether Shimano is putting effort into handling cantilever brakes
is a more important question than what other manufacturers do,
and the mechanical advantage ratio of BR-CX70/50
uses Shimano's own proprietary standard called NEW Super SLR,
which differs from the traditional side-pull or cantilever ratio.
This is somewhat closer to the V-brake ratio and is incompatible
with traditional brakes (pre-7800 era Shimano).
From my own actual experience, pairing ST-6770 levers with TRP cantilever brakes—
a NEW lever plus traditional brake combination—
resulted in the brake not working properly; even when squeezing the lever hard,
once you pass the shoe contact point, the mechanical advantage doesn't convert to braking power.
A similar issue exists with direct-mount brakes (→here).
Actually, I wrote about the same thing in that linked post... oh well.
In other words, the only cantilever brake you can properly pull with current brake levers
is the current BR-CX50.
If there were third-party cantilever brakes labeled "Shimano ratio,"
that would be a different story, but if such a brake existed, it would never work with SRAM or Campagnolo.
The mechanical advantage mismatch issue is not something you can solve
with some technique in how you squeeze the brake lever—it's a fundamental incompatibility.
This CX75 rear hub stock limitation issue is the same deal—
Shimano's characteristic ruthlessness in abandoning old tech is clear:
"Hey, if you're still using quick-release frames or cantilever brakes,
just go ahead and swap them out for through-axle frames and disc brakes already."
It's almost refreshingly decisive.
Per the customer's request, I applied tubeless tape
and installed a tubeless valve, but
I installed a temporary tire and pressurized it once to press the tape down more firmly.
Built a rear wheel with Crest MK3 rim.
FH-CX75 28H black half-comp 4-cross JIS lacing with rim tape.
This CX75 hub, the rear hub only, is marked as "limited stock,"
which means once it's gone, that's it.
There's no reason to discontinue the rear hub alone,
so it's quite possible the front hub will eventually follow suit.
Shimano's CX series brakes—
the top-tier cantilever model was BR-CX70,
and the lower-tier model was CX-50.
BR-CX70 was discontinued and dropped from the catalog in 2017.
The difference between CX70 and 50 is the finish on the body (70 has gray anodize to match Ultegra)
and the brake shoes—whether they use booster plus cartridge shoes or solid shoes—but
whether Shimano is putting effort into handling cantilever brakes
is a more important question than what other manufacturers do,
and the mechanical advantage ratio of BR-CX70/50
uses Shimano's own proprietary standard called NEW Super SLR,
which differs from the traditional side-pull or cantilever ratio.
This is somewhat closer to the V-brake ratio and is incompatible
with traditional brakes (pre-7800 era Shimano).
From my own actual experience, pairing ST-6770 levers with TRP cantilever brakes—
a NEW lever plus traditional brake combination—
resulted in the brake not working properly; even when squeezing the lever hard,
once you pass the shoe contact point, the mechanical advantage doesn't convert to braking power.
A similar issue exists with direct-mount brakes (→here).
Actually, I wrote about the same thing in that linked post... oh well.
In other words, the only cantilever brake you can properly pull with current brake levers
is the current BR-CX50.
If there were third-party cantilever brakes labeled "Shimano ratio,"
that would be a different story, but if such a brake existed, it would never work with SRAM or Campagnolo.
The mechanical advantage mismatch issue is not something you can solve
with some technique in how you squeeze the brake lever—it's a fundamental incompatibility.
This CX75 rear hub stock limitation issue is the same deal—
Shimano's characteristic ruthlessness in abandoning old tech is clear:
"Hey, if you're still using quick-release frames or cantilever brakes,
just go ahead and swap them out for through-axle frames and disc brakes already."
It's almost refreshingly decisive.
Per the customer's request, I applied tubeless tape
and installed a tubeless valve, but
I installed a temporary tire and pressurized it once to press the tape down more firmly.