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
>>
>>
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>>>constant lubing.
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>>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.
http://groups.google.com/groups?selm=3E14DD50.6B1931DC%40ix.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.
