stress relieving used wheels?

Is it a good or bad idea to stress relieve a factory built wheel (that has probably never had stress
relieving treatment) but that has done 3k miles or so?

cheers,
--

-Alex

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alexpg@btinternet.com

http://alexpg.ath.cx:3353/cycling.php http://www.westerleycycling.org.uk
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Alex Graham writes:

> Is it a good or bad idea to stress relieve a factory built wheel (that has probably never had
> stress relieving treatment) but that has done 3k miles or so?

This is a case where "better late than never" is correctly applied. Yes do it.

Jobst Brandt jobst.brandt@stanfordalumni.org Palo Alto CA

On Tue, 22 Apr 2003, Alex Graham wrote:
> Is it a good or bad idea to stress relieve a factory built wheel (that has probably never had
> stress relieving treatment) but that has done 3k miles or so? cheers,

I guess it is too late. Provided you have not ridden on velvet, that has been taken care of already
(and I hope you have, in the meantime, done touch-ups to keep your wheels as true as possible).

Sergio Pisa

Sergio SERVADIO wrote:

> On Tue, 22 Apr 2003, Alex Graham wrote:
>> Is it a good or bad idea to stress relieve a factory built wheel (that has probably never had
>> stress relieving treatment) but that has done 3k miles or so? cheers,
>
> I guess it is too late. Provided you have not ridden on velvet, that has been taken care
> of already

Tension does not increase significantly in any of your spokes when you're riding. You need to
stress-relieve by hand.

--
Benjamin Lewis

A small, but vocal, contingent even argues that tin is superior, but they are held by most to be the
lunatic fringe of Foil Deflector Beanie science.

I think the 3k miles are the stress relieve treatment for your wheel. What do you think of that
Jobst? Doc. <jobst.brandt@stanfordalumni.org> a écrit dans le message de news:
nQdpa.7726$JX2.499312@typhoon.sonic.net...
> Alex Graham writes:
>
> > Is it a good or bad idea to stress relieve a factory built wheel (that has probably never had
> > stress relieving treatment) but that has done 3k miles or so?
>
> This is a case where "better late than never" is correctly applied. Yes do it.
>
> Jobst Brandt jobst.brandt@stanfordalumni.org Palo Alto CA

ysauvageau@megaquebec.net wrote:

> I think the 3k miles are the stress relieve treatment for your wheel. What do you think of that
> Jobst? Doc.

Well, I'm not Jobst, but what makes you think that riding on a wheel will stress relieve it?

--
Benjamin Lewis

It takes two to tell the truth: one to speak and one to hear.

Stress relieving involves a temporary and substantial increase in spoke tension. That doesn't happen
in the course of normal riding, as the tension is highest at rest, with no load on the wheel.

> I think the 3k miles are the stress relieve treatment for your wheel. What do you think of that
> Jobst? Doc.

> > > Is it a good or bad idea to stress relieve a factory built wheel (that has probably never had
> > > stress relieving treatment) but that has done 3k miles or so?
> >
> > This is a case where "better late than never" is correctly applied. Yes do it.
> >
> > Jobst Brandt

--
Ted Bennett Portland OR

Riding on a wheel will stress relieve it? I think yes. True a wheel or build a wheel and don't
stress relieve treatment on this wheel and go ride with
it. You will heard many ``sounds'' of the spokes:that is stress relieve.Doc "Benjamin Lewis"
<bclewis@cs.sfu.ca> a écrit dans le message de news: yy7owuhln9en.fsf@marge.cs.sfu.ca...
> ysauvageau@megaquebec.net wrote:
>
> > I think the 3k miles are the stress relieve treatment for your wheel. What do you think of that
> > Jobst? Doc.
>
> Well, I'm not Jobst, but what makes you think that riding on a wheel will stress relieve it?
>
> --
> Benjamin Lewis
>
> It takes two to tell the truth: one to speak and one to hear.

When you ride your bike,you are increasing the spoke tension. The guy on the saddle put a charge on
the wheels,on the spokes.When you turn the handlebar you are putting a charge on the spokes.When you
apply the brakes you put a charge on the spokes.Doc "Ted Bennett" <tedbennett@earthlink.net> a écrit
dans le message de news: tedbennett-0C92EF.21294422042003@news.mindspring.com...
> Stress relieving involves a temporary and substantial increase in spoke tension. That
> doesn't happen in the course of normal riding, as the tension is highest at rest, with no
> load on the wheel.
>
> > I think the 3k miles are the stress relieve treatment for your wheel.
What
> > do you think of that Jobst? Doc.
>
> > > > Is it a good or bad idea to stress relieve a factory built wheel
(that
> > > > has probably never had stress relieving treatment) but that has done
3k
> > > > miles or so?
> > >
> > > This is a case where "better late than never" is correctly applied. Yes do it.
> > >
> > > Jobst Brandt
>
> --
> Ted Bennett Portland OR

ysauvageau@megaquebec.net wrote:

> Riding on a wheel will stress relieve it? I think yes. True a wheel or build a wheel and don't
> stress relieve treatment on this wheel and go ride with it. You will heard many ``sounds'' of the
> spokes:that is stress relieve.

No, that is twisted spokes unwinding.

--
Benjamin Lewis

On a paper submitted by a physicist colleague: "This isn't right. This isn't even wrong." --
Wolfgang Pauli

ysauvageau@megaquebec.net wrote:

> When you ride your bike,you are increasing the spoke tension.

No, when you ride your bike, you are *decreasing* the spoke tension.

--
Benjamin Lewis

On a paper submitted by a physicist colleague: "This isn't right. This isn't even wrong." --
Wolfgang Pauli

>No, when you ride your bike, you are *decreasing* the spoke tension.
its it, decreasing *average* tension??? otherwise you are say that if l load the wheel enough there
will be no tension on the spokes

and if riding on a wheel(back wheel more than the front, because it has the torque from pedaling,
unless of course you have a disc front) doesn't stress relieve the wheel over time. then why stress
relieve them by hand first?

never built a wheel in my life have straighten a few

st@hotmail.com wrote:

>> No, when you ride your bike, you are *decreasing* the spoke tension.
> its it, decreasing *average* tension??? otherwise you are say that if l load the wheel enough
> there will be no tension on the spokes

That's right, if you load the wheel too much there will be no tension in the spokes (the ones
between the hub and the road).

There will be a very small increase in tension in all the other spokes, but not enough to stress
relieve them.

> and if riding on a wheel(back wheel more than the front, because it has the torque from pedaling,
> unless of course you have a disc front) doesn't stress relieve the wheel over time. then why
> stress relieve them by hand first?

To prevent fatigue. See Jobst Brandt's book, _The Bicycle Wheel_, for more information.

--
Benjamin Lewis

On a paper submitted by a physicist colleague: "This isn't right. This isn't even wrong." --
Wolfgang Pauli

still don't get it what part of the spoke are you stress relieving? the way l see it, it is where
the spokes cross each other, right? (looking at the pic on Mr sheldon browns page) ie bending the
spokes so they sit well against each other while l agree that this may make a "wheel that is true
and round, and will stay that way better than most machine made wheels" but l don't understand how
it helps with fatigue. don't most spokes break at the nipple end?

am dieing to go my spokes with and old crank, just trying to understand why

st@hotmail.com wrote:

> still don't get it what part of the spoke are you stress relieving?

The parts that are near their yield point.

> the way l see it, it is where the spokes cross each other, right? (looking at the pic on Mr
> sheldon browns page)

You stress relieve by momentarily increasing tension in the spokes, so that the parts at high stress
points will deform plastically and take a new set. When you remove the tension (i.e. let go of the
spokes) these points will relax to lower stress.

> ie bending the spokes so they sit well against each other while l agree that this may make a
> "wheel that is true and round, and will stay that way better than most machine made wheels" but l
> don't understand how it helps with fatigue. don't most spokes break at the nipple end?

Yes, this is where most of the initial high stresses are.

Have a look at Jobst Brandt's book, he explains it much better than I can.

http://www.avocet.com/wheelbook/wheelbook.html

--
Benjamin Lewis

On a paper submitted by a physicist colleague: "This isn't right. This isn't even wrong." --
Wolfgang Pauli