New thread to avoid my habit of yanking threads off-thread.

I'm curious to hear details of the problems you faced, the problems that
frustrated you about disk brakes.

I ask because I've found even cable disk brakes, and even *really cheap* cable
disk brakes (OEM Tektros or what have you on the Monocog: these were so
cheap they didn't even have pad adjusters; the only adjuster was the
cables), and even cable disk brakes *pulled by road levers* perfectly
ordinary and acceptable. On my Monocog 29er I have Shimano 600 AX lever
(short pull, so I read) pulling Road BB7s, and they perform at least as
well as most single pivot and centerpull calipers I've used -- more power,
poorer modulation. I don't get rubbing, the "feel" is firm, the brakes stop
fine; not the crushing power of hydraulics but "fine" -- I can hurt myself
with the front brake.

Now, when I first used disks on my first 2010 Monocog 29er, I did have
problems: very weak (oh, so laughably weak), rubbing, mushy levers; both
with MTB BB7s and long-pull drop bar levers, and Road BB7s and standard
road levers.

But in frustration I researched BB7 setup, and learned a crucial trick:
don't attach the cable to the actuation arm when the arm is fully relaxed;
move the arm ~1/3 through its travel and attach the cable at that point.
Wala; problem solved.

Now, with the Road BB7s on the current 2012 Monocog 29er I do find that I
often have to mess with caliper positioning (not pad adjustment;
re-positioning the entire caliper) when I remove and then replace a wheel;
but this is accomplished simply by releasing the caliper mounting bolts,
squeezing the lever, and re-tightening. This does not happen every time I
remove and replace a wheel, and when it does happen it takes just a minute
per caliper/wheel. *And* I use sealant in tubeless tires, so this happens
as often as I have to adjust chain tension on the ss drivetrain.

And: the hybrid cable/hydraulic TRP HyRds: these are absolutely foolproof;
set them up and afterward the only thing you have to do is remember not to
squeeze the brake levers with the wheel removed, unless you insert a shim
between the pads.

Now, I ride in dry, dusty conditions. Very dusty conditions, as 3 or 4 inch
silty sand, will occasionally -- "occasionally" -- cause a very faint
"whisp-whisp-whisp" sound from pads and rotors, but this goes away once you
get to firmer ground and it does not cause any noticeable drag. I have had
excruciatingly loud squeal with wet pads but that occurred with a
particular pad/rotor combo, and not with others.

I'll be interested to hear more about the problems, including a description
of the calipers, levers, and whether cable or hydraulic or hybrid.



On Sun, Apr 16, 2023 at 9:22 AM ascpgh <[email protected]> wrote:

> ...  My fifteen year experiment with discs on drop bar, bar end shifter
> bikes lead me to spec cantilevers on my custom two years ago. I'll gladly
> accept the the variables I know about brakes, braking, parts, pieces,
> installation and adjustment over unique, sporadic mystery sounds and
> finickiness that are beyond control and lead to throwing new parts into the
> system at a rate embarrassing compared to rim brakes.
>
-- 

-----------------------------------------------------------------------
Patrick Moore
Alburquerque, Nuevo Mexico, Etats Unis d'Amerique, Orbis Terrarum

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