Brake pads eating rims?

I am really surprised this is happening with tektro pads, i thought
only shimano was stupid enough to make rim-destroying brake pads
(my 1998 ultegra pads ate my mavic CXP 21 rims.)

After replacing my pads with kool stop salmon pads - and no rim
sanding - it worked perfectly - at least until my high-tech frame
failed a few weeks later.

- Don Gillies
San Diego, CA

I have purchased two sets of Tektro brakes. Each time I heard that
grinding sound. Good brakes, but pads are crap. Replaced with Kool
Stop black and all is perfect.

try an abrasive pad-from walmort!

wrote in message
oups.com...
try an abrasive pad-from walmort!

Clever, "mort" for killer pad?
Bill

Warren, it's the rims. For some reason which I cannot understand, SOME
extrusions will have a granular structure that comes apart exactly this
way. Maybe it's the temperature control or perhaps it's the bottom of
the bucket. Whatever.

A friend of mine had a LeMond which had exactly this problem. He tried
everything and when he replaced his rims (warranty) with the same
thing. It ended up doing the same thing. He then had a set of custom
wheels built and that was the end of the problem.

I've never had this happen on any of my wheels but I personally
observed this problem and I know that he tried three different types of
brake pads.

On 2005-06-27 11:17:37 -0700, Warren Block said:

wrote:

FWIW, I have heard about using KoolStop Salmons, but my LBS didn't have
any. I'm not convinced that they'd be much better than the DA
pads....to me it seems like a rim problem.

No, it's the pads. It's been a mystery for a long time why Shimano can
make some pretty good hardware and yet have such terrible brake pads.

I happen to like the pads. They modulate extremely well. Kool stops
are a bit grabbier, which to me means "modulate less well." I don't
really want the brakes to come on suddenly... if I really want to slow,
I'll squeeze harder.

FYI if you want to see real pad wear, track down a pair of Ritchey foul
weather (blue) brake pads. I rode them for 1 month, and was
continually coating my bike with aluminum dust. I wore about 1 mm off
the sidewalls in about 1000 miles of riding. I switched the pads, but
broke through the sidewall about 6 months later... the rim lasted 7
months. That was stupid :-/

hey-you herd it hear!
the road way runs on friction. the road itself is charged. the not road
is oppositely charged
it is a particle non accelerator of
sorts-particulate-hydrocarbons-regular carbons-filth-shards of
metal-rubberdust expletive deleetd deep ceptin for the rubber eatin
bacteria-
what mess. well it is. check this area out
http://www.topozone.com/map.asp?z=18...83&layer=DRG25
cannot breath here.
so run a magnet on the ground near the non accelerator and whola!
totally oxide ferrous planet. this stuff fill the air down there at
ground level and yes the impact of raindrops craters the debris rim
upward and right into your pads. whattabummer.

the area to the west-overpeck creek and hackensack beyond was settled
by the dutch in 1492.
rumors have it there were oysters 3' long and so many the dutch fed
same to cattle or goats.

wrote:
There is some definite pitting on the rim; not a lot, but enough to
indicate some metal has been stripped. It's difficult to describe the
size of the pits...they are visible on close inspection, but not
terribly apparent otherwise.

Also, running the rim through my fingers (and visually), I can detect
some "banding" of the rim....grooves, if you will. I am a newbie, but
I don't believe that the grooves are outside the realm of normal rim
wear; I haven't done a lot of braking with metal in the pads. Rims
aren't expected to be perfectly smooth and polished like disc rotors,
are they?

With good pads and occasional inspection/maintenance if required, they
should be grooveless.

--
Phil, Squid-in-Training

wrote:
the area to the west-overpeck creek and hackensack beyond was settled
by the dutch in 1492.
rumors have it there were oysters 3' long and so many the dutch fed
same to cattle or goats.

I've used the same pads they sell at Walmart... They picked up grit and lost
all braking power. I then switched my brakes to dual-pivots with
10-year-old Shimano 105 pads and they work very well.

--
Phil, Squid-in-Training