On Sat, 31 Mar 2018 07:28:07 -0700, Joerg
wrote:

On 2018-03-30 16:56, John B. wrote:
On Fri, 30 Mar 2018 07:19:42 -0700, Joerg
wrote:

On 2018-03-30 02:04, John B. wrote:
On Thu, 29 Mar 2018 16:44:58 -0700, Joerg
wrote:

On 2018-03-29 14:34, Roger Merriman wrote:
sms wrote:
On 3/27/2018 7:39 AM, Joerg wrote:

Hydraulics also can suffer from sudden fade and that's scary. Then they
require bleeding which, depending on the kind, is a messy business. On
mine particularly so because there is no bleed kit for them. Cable disc
brakes are fine for pavement riding, just not for heavy duty MTB riding.

Avoid hydraulic disc brakes at all costs. Stick to mechanical disc brakes.



Which require constant adjustments as the pads wear, have cables that
weather eats, etc.

All my bikes have disks the CX/gravel/adventure road? Is cable the others
are hydraulic.

The cable is a lot more fuss, the Hydros just work, once set up you feed
them pads which is very easy.

Personally as someone who rides off-road plus high (ish) miles commuting
disks and preferably Hydro are game changers in terms of performance and
maintenance.

In terms of stuff like power, there is quite a overlap between the two, my
gravel bikes cable disks is about as powerful as the old commute MTB with
its older and cheaper Hydro brakes, both are embarrassing weak compared to
my Full suspension MTB.


I recently upgrade to 8" rotors front and back. That was the real game
changer. I can lock up either wheel with one finger and brake response
is prontissimo. Now I no longer have to worry when riding a steep trail
with some cargo in the back.

But I can lock up either, or both, wheels with vee brakes. With one
finger unless I want to lock both wheels which takes two fingers :-)

And, I might add, no requirement for bleeding either.


Now try that again when the rims are wet. With locking up I mean
instantly, tens of milliseconds.

A recent study demonstrated that an auditory stimulus takes 8 - 10 ms
to reach the brain, but on the other hand, a visual stimulus takes
20-40 ms. After the brain recognizes the event it must trigger the
muscles to react. Most texts seem to suggest that a good reaction time
is anywhere between 0.25 seconds and 0.35 seconds. Or 250 - 350
milliseconds. Your 10 millisecond reaction is much quicker then has
been tested in humans.... One can only assume that you are from
Krypton.


Ever heard of the term "muscle memory"?

Yup. and I am also aware of the old barroom game where you hold your
thumb and forefinger about an inch apart and a guy dangles a dollar
bill between them. the game is when he drops the bill you catch it
without moving your hand up or down, and you probably can't do it.

I've been playing the game for, probably, forty years and haven't come
across more then 10 or a dozen individuals in all those years who can
catch the bill.

As I said, one can only assume that you are from Krypton.




Anyhow, it doesn't matter. Even if your decision and action takes a
whopping half second and _then_ you pull the brake lever, it does matter
whether the braking occurs instantly or 1-2sec delay _after_ pulling the
lever. If a turn with a cliff is coming up it matters a whole lot.

Rim brakes are something for the dust bin of history just like the old
rubber pads that pushed onto the running surface of the front tire.
--
Cheers,

John B.