Damaged rims - Cycling Mob: Road Cycling, Mountain Biking and More

11-04-2003, 12:53 PM

6 months ago I bought new wheels with Mavic T224 rims (700C). Almost
immediately, I started to hear shrieking noises when braking, and found that
the rims were wearing out far too quickly. Inspecting the brake pads I
found pieces of aluminum, sometimes up to 1 mm in size.
I have changed the pads (Shimano XT for alu rims). Several times I have
cleaned them to get rid of the alu bits. I have repolished the rims.
It worked during 1 day or 1 week, then it always started again.

Anybody with a similar experience ?
Were the rims possibly defective ?
Have I done something very wrong ? I suspect I may have, as I didn't think
of changing the brake pads right when I installed the new wheels. But can
it be that bad ?
Does anybody have an idea of something I could do to save these rims ?

Context info: the bike is used daily in all weather, mainly for short
commuting (13 km roundtrip) in town. At this time, I probably covered
~3000 km with these new wheels.

Thanks for your advice

Jacques

11-04-2003, 01:36 PM

In article <[Only registered and activated users can see links. ]>, [Only registered and activated users can see links. ]
says...
>6 months ago I bought new wheels with Mavic T224 rims (700C). Almost
>immediately, I started to hear shrieking noises when braking, and found that
>the rims were wearing out far too quickly. Inspecting the brake pads I
>found pieces of aluminum, sometimes up to 1 mm in size.
>I have changed the pads (Shimano XT for alu rims). Several times I have
>cleaned them to get rid of the alu bits. I have repolished the rims.
>It worked during 1 day or 1 week, then it always started again.
>Anybody with a similar experience ?
>Were the rims possibly defective ?
>Have I done something very wrong ? I suspect I may have, as I didn't think
>of changing the brake pads right when I installed the new wheels. But can
>it be that bad ?
>Does anybody have an idea of something I could do to save these rims ?

Try new brake pads. What is happening is that bits of metal are embedding into
your pads and the metal scrapes off more metal from your rims. New
pads that don't get metal embedded in them should solve your problme. I like
the Kool Stop Salmon pads.
----------------
Alex

11-04-2003, 03:26 PM

"jacques" <jamnospam@bluewin.ch> wrote in message
news

an.2003.11.04.21.53.06.28565@bluewin.ch...
> 6 months ago I bought new wheels with Mavic T224 rims (700C). Almost
> immediately, I started to hear shrieking noises when braking, and found
that
> the rims were wearing out far too quickly. Inspecting the brake pads I
> found pieces of aluminum, sometimes up to 1 mm in size.
> I have changed the pads (Shimano XT for alu rims). Several times I have
> cleaned them to get rid of the alu bits. I have repolished the rims.
> It worked during 1 day or 1 week, then it always started again.
>
> Anybody with a similar experience ?
> Were the rims possibly defective ?
> Have I done something very wrong ? I suspect I may have, as I didn't think
> of changing the brake pads right when I installed the new wheels. But can
> it be that bad ?
> Does anybody have an idea of something I could do to save these rims ?
>

1. Dump the Shimano pads. Now. They are the worst , and seem to peel the
alu right off, then store it in the pad and use it to score up the rim.

2. Get Koolstop Salmon pads installed. I've used these on a dozen bikes with
nary an issue.

Tom Thompson

11-05-2003, 01:01 PM

>
> Try new brake pads. What is happening is that bits of metal are embedding into
> your pads and the metal scrapes off more metal from your rims. New
> pads that don't get metal embedded in them should solve your problme. I like
> the Kool Stop Salmon pads.
> ----------------
> Alex

Thanks, guys, for the advice. I'll try these Kool Stop and let you know in
a few days.

Jacques

11-17-2003, 01:13 PM

On Wed, 05 Nov 2003 23:01:28 +0100, jacques wrote:

>>
>> Try new brake pads. What is happening is that bits of metal are embedding into
>> your pads and the metal scrapes off more metal from your rims. New
>> pads that don't get metal embedded in them should solve your problme. I like
>> the Kool Stop Salmon pads.
>> ----------------
>> Alex
>
>
> Thanks, guys, for the advice. I'll try these Kool Stop and let you know in
> a few days.
>
> Jacques

I've installed the Kool Stop pads this week-end, and just tried them
today. My first judgement is that they work great. I really jammed on the
brakes and nothing bad happened. Let's see how they behave in the long
run, but in the meantime it looks like I've saved a pair of rims !

Jacques