Rear Rim

Neil Smith said:

Dear All,
There is a bulge on one side only of the rear wheel rim.
Would any one care to speculate as to whether the rim is about to go
or it is the result of a bump. Thanks Neil

Dunno, have you hit any bumps? I think you may have noticed one big
enough to dent the rim.

--
Mike

Neil Smith said:

Dear All,
There is a bulge on one side only of the rear wheel rim.
Would any one care to speculate as to whether the rim is about to go or it
is the result of a bump.
Thanks
Neil

put a bit more pressure in the tyre. If the rim bulges a bit more,
then Yes it is probably too thin. Best to put on some safety specs

--
"You can't see paradise if you don't pedal" (Fowler, Chicken Run)

Pete Whelan said:

Neil Smith said:

Dear All,
There is a bulge on one side only of the rear wheel rim.
Would any one care to speculate as to whether the rim is about to go or it
is the result of a bump.
Thanks
Neil

put a bit more pressure in the tyre. If the rim bulges a bit more,
then Yes it is probably too thin. Best to put on some safety specs

And earplugs.

in message <[email hidden]>, Neil Smith

(') said:

Dear All,
There is a bulge on one side only of the rear wheel
rim.
Would any one care to speculate as to whether the rim is about to go or
it is the result of a bump.

How old (i.e. how many miles) is the rim? If there is a possibility it's
worn out, replace, because a rim letting go is not funny. Replacing a
rim (with one of identical size) is much easier than building a wheel
from scratch.

--
[email hidden] (Simon Brooke) http://www.jasmine.org.uk/~simon/

;; IE 3 is dead, but Netscape 4 still shambles about the earth,
;; wreaking a horrific vengeance upon the living
;; anonymous

I followed a hint earlier and deflated the tyre. The rim felt firm and
didn't change shape. This suggests to me a bash. It is curious though that
there is no hint of a bulge on the other side of the rim.
"Simon Brooke" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

in message <[email hidden]>, Neil Smith

(') said:

Dear All,
There is a bulge on one side only of the rear wheel
rim.
Would any one care to speculate as to whether the rim is about to go or
it is the result of a bump.

How old (i.e. how many miles) is the rim? If there is a possibility it's
worn out, replace, because a rim letting go is not funny. Replacing a
rim (with one of identical size) is much easier than building a wheel
from scratch.

--
[email hidden] (Simon Brooke) http://www.jasmine.org.uk/~simon/

;; IE 3 is dead, but Netscape 4 still shambles about the earth,
;; wreaking a horrific vengeance upon the living
;; anonymous

Neil Smith said:

I followed a hint earlier and deflated the tyre. The rim felt firm and
didn't change shape.

The wall of the rim is presumably aluminium, so isn't elastic. If it
was deformed through pressure and insufficient thickness it has a new
shape, I don't think it would spring back as the pressure was
released.

"Bob"
--

Email address is spam trapped, to reply directly remove the beverage.

"Call me Bob" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Neil Smith said:

I followed a hint earlier and deflated the tyre. The rim felt firm and
didn't change shape.

The wall of the rim is presumably aluminium, so isn't elastic. If it
was deformed through pressure and insufficient thickness it has a new
shape, I don't think it would spring back as the pressure was
released.

Dunno where you got the idea that aluminium isn't elastic from. On a worn
rim, it can easily be bendy enough to change shape under pressure and spring
back.

cheers,
clive

Clive George said:

Quoted message said:

The wall of the rim is presumably aluminium, so isn't elastic. If it
was deformed through pressure and insufficient thickness it has a new
shape, I don't think it would spring back as the pressure was
released.

Dunno where you got the idea that aluminium isn't elastic from. On a worn
rim, it can easily be bendy enough to change shape under pressure and spring
back.

Well there you go, I stand corrected.

Generally if I bend a piece a aluminium and then let go, it stays
bent. I didn't think a rim deformation would spring back into it's
original form under the above conditions.

"Bob"
--

Email address is spam trapped, to reply directly remove the beverage.

"Call me Bob" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Clive George said:

Quoted message said:

The wall of the rim is presumably aluminium, so isn't elastic. If it
was deformed through pressure and insufficient thickness it has a new
shape, I don't think it would spring back as the pressure was
released.

Dunno where you got the idea that aluminium isn't elastic from. On a worn
rim, it can easily be bendy enough to change shape under pressure and
spring
back.

Well there you go, I stand corrected.

Generally if I bend a piece a aluminium and then let go, it stays
bent. I didn't think a rim deformation would spring back into it's
original form under the above conditions.

It all depends how far you bend it - same as with most metals, standard
hookes law type stuff. Wheels are particularly good examples - eg the
deformation of the rim at the bottom of the wheel (see spokes
hanging/standing :-) ) is definitely elastic, otherwise it just wouldn't
work!

cheers,
clive

in message <[email hidden]>, Clive

George (') said:

see spokes
hanging/standing

Please, please no!

--
[email hidden] (Simon Brooke) http://www.jasmine.org.uk/~simon/

;; Human history becomes more and more a race between
;; education and catastrophe.
H.G. Wells, "The Outline of History"

Simon Brooke said:

in message <[email hidden]>, Clive

George (') said:

see spokes
hanging/standing

Please, please no!

Too late!

HEY EVERYBODY! THERE'S A BLOKE HERE WANTS TO KNOW IF THE HUB HANGS OR
STANDS!

<...steps discreetly into the shadows to watch the fight...>

Tim Binns said:

Simon Brooke said:

in message <[email hidden]>, Clive

George (') said:

see spokes
hanging/standing

Please, please no!

Too late!

HEY EVERYBODY! THERE'S A BLOKE HERE WANTS TO KNOW IF THE HUB HANGS OR
STANDS!

<...steps discreetly into the shadows to watch the fight...>

What do the population studies suggest?

--
Don Whybrow

Sequi Bonum Non Time

"My God! The thought of that evil man, loose in London--with
money, from God only knows what source--fomenting riot and
rebellion during a public emergency--and in control of an Engine-
driven press! It's nightmarish!" (Gibson-Sterling, "The
Difference Engine"😉

"Tim Binns" <[email hidden]> wrote in message

Quoted message said:

HEY EVERYBODY! THERE'S A BLOKE HERE WANTS TO KNOW IF THE HUB HANGS OR
STANDS!

Both?
http://www.sheldonbrown.com/nanodrive/bianchi-quarter.jpg

Clearly the wheel we are normally accustomed to seeing is
another reactionary directive from the UCI.

Response to Tim Binns:

Quoted message said:

Quoted message said:

Please, please no!

Too late!

HEY EVERYBODY! THERE'S A BLOKE HERE WANTS TO KNOW IF THE HUB HANGS OR
STANDS!

<...steps discreetly into the shadows to watch the fight...>

<...cross-posts to r.b.t., goes off on three-week holiday...>

--
Mark, UK
"If Tyranny and Oppression come to this land, it will be in the guise of
fighting a foreign enemy."

Don Whybrow said:

Tim Binns said:

Simon Brooke said:

in message <[email hidden]>, Clive
George ([email hidden]'😉 wrote:

>see spokes
>hanging/standing

Please, please no!

Too late!

HEY EVERYBODY! THERE'S A BLOKE HERE WANTS TO KNOW IF THE HUB HANGS OR
STANDS!

<...steps discreetly into the shadows to watch the fight...>

What do the population studies suggest?

Will we get a rash of FS posts now?
Are we bringing back Hanging and Flogging?

...d

Tim Binns said:

HEY EVERYBODY! THERE'S A BLOKE HERE WANTS TO KNOW IF THE HUB HANGS OR
STANDS!

Bah. Ask a dumb question - in this case one presupposing an either/or
answer - and you'll reach dumb conclusions. That's how we get nonsense
like Gods.

--
not me guv