Jay Beattie said:"jim beam" <[email hidden]> wrote in message
"]news:[email hidden]...
Quoted message said:Benjamin Lewis said:jim beam wrote:
>Jay Beattie wrote:
>
>
>>"Qui si parla Campagnolo " <[email hidden]> wrote in
message
Quoted message said:Quoted message said:>>"]news:[email hidden]...
>>
>>
>>
>>>michael-<< What kind of noise problems do you see on
>>>Open
Pros?
Quoted message said:Quoted message said:>>>
>>>><BR><BR>
>>>
>>>Clicking wedge that holds it together for welding,
>>>noisy
>>
>>eyelets that need
>>
>>
>>
>>>constant lubing.
>>
>>I have ripped out two eyelets/sockets on two Open
>>Pros in
the
Quoted message said:Quoted message said:>>last three months. One wheel probably had five hundred
>>miles
on
Quoted message said:Quoted message said:>>it, the other one probably had a few thousand (maybe
>>less).
Very
Quoted message said:Quoted message said:>>frustrating. I build them tight, but not taco tight
>>-- and
I
Quoted message said:Quoted message said:>>figure any good rim should be able to handle the
>>stress and
give
Quoted message said:Quoted message said:>>longer service than a few thousand miles. 32 and 36
>>hole. I
am
Quoted message said:Quoted message said:>>205lbs. -- Jay Beattie.
>
>excess tension does not make the wheel stronger - see
"question 1" on
Quoted message said:Quoted message said:>this page
Who said it does?
here's just one.
groups.google.comgroupsOpen ↗
ix.netcom.com&output=gplain
Quoted message said:there are countless threads that repeat this
misconception here
all the
Quoted message said:time. fact is, tension does /not/ increase strength
of either
spoke or
Quoted message said:rim. damon's deflection chart proves that. tension
needs to
be what
Quoted message said:the rim manufacturer recommends and no more.
Inadequate tension results in the wheel going out of true.
agreed.
Quoted message said:I put a considerable load on the wheel, which means
I need a lot of tension to keep the spokes from
going slack.
here's the crux of the issue. if it's a lateral load, you
can easily make any spoke go completely slack, regardless of
tension, so there has to ba a practical limit to how high
you want tension to be in order to defeat the indefeatable.
Quoted message said:But I do not taco the wheel during building -- or get
that malignant wave, so I am not over the limit. All of
this is simply to say that I am not ripping the spokes
out during the build process, and that they are getting
ripped out during normal riding.
are you using a tensiometer while building? if the rim
manufacturer specifies a maximum tension and you exceed it,
you /are/ going to have reliability problems. it's because
you're operating the component closer to it's yield point,
and the closer to yield, the shorter the fatigue life.
Quoted message said:This should not happen.
if you are building to manufacturer spec and you're still
having problems, then yes, this should not happen. then you
have recourse to the manufacturer under warranty.
Quoted message said:Both rims were anodized.
the chances are, the anodizing is irrelevant. there is no
definitive causal relationship between anodizing and
cracking if the cracks do not emanate from anodizing defects
- which is almost always the case in the failures i've
examined. yes, anodizing /can/ cause cracking, but it's
unlikely to show itself in the presence of other much more
significant failure sources.
truth is, anodizing protects against pitting. pitting is a
major failure initiator. pitting is often caused by chloride
salts. sweat is loaded with these salts, as are slushy roads
in snowy states.
i believe the problems you've had are avoidable. use a
tensiometer. the $50 park tool is perfectly adequate, and
for that money, it's a cheap insurance against expensive
repeated rim failures.
