Reynolds MZM magesium tubing

Reynolds MZM magesium tubing
(https://vault2.secured-url.com/reynolds/magnesium.html)

I noticed recently that Reynolds is now producing a MZM magnesium
tubing. Has anyone had any experience or technical knowledge of
magnesium frames....???

Randall Shimizu wrote:
Reynolds MZM magesium tubing
(https://vault2.secured-url.com/reynolds/magnesium.html)

I noticed recently that Reynolds is now producing a MZM magnesium
tubing. Has anyone had any experience or technical knowledge of
magnesium frames....???



Dumbass -


Yes.



K. Gringioni.

"Randall Shimizu" wrote in message
om...
Reynolds MZM magesium tubing
(https://vault2.secured-url.com/reynolds/magnesium.html)

I noticed recently that Reynolds is now producing a MZM magnesium
tubing. Has anyone had any experience or technical knowledge of
magnesium frames....???

IIRC, there was a company called Kirk that produced a cast magnesium frame
back around 1990 called the Kirk Precision.

http://www.firstflightbikes.com/KirkPrecision.html

I think a Dutch team (TVM, Phil Anderson come to mind) rode them briefly
before returning to conventional materials/styles.

On 24 Oct 2004 16:41:10 -0700, (Randall Shimizu)
wrote:

Reynolds MZM magesium tubing
(https://vault2.secured-url.com/reynolds/magnesium.html)

I noticed recently that Reynolds is now producing a MZM magnesium
tubing. Has anyone had any experience or technical knowledge of
magnesium frames....???

While Reynolds is a name that I would ordinarily trust, magnesium is a
material that I wouldn't. The tubing in question, however, is
described as a magnesium *alloy*, and depending upon the ratios of
metals used, could be good. The only bike frame of which I'm aware
that was pure magnesium was the Kirk precision, which used a casting
instead of tubes. It had problems with cracking, which is precisely
what I'd have expected.


--
Typoes are a feature, not a bug.
Some gardening required to reply via email.
Words processed in a facility that contains nuts.

On Mon, 25 Oct 2004 00:13:48 GMT, Werehatrack
wrote:

On 24 Oct 2004 16:41:10 -0700, (Randall Shimizu)
wrote:

Reynolds MZM magesium tubing
(https://vault2.secured-url.com/reynolds/magnesium.html)

I noticed recently that Reynolds is now producing a MZM magnesium
tubing. Has anyone had any experience or technical knowledge of
magnesium frames....???

While Reynolds is a name that I would ordinarily trust, magnesium is a
material that I wouldn't. The tubing in question, however, is
described as a magnesium *alloy*, and depending upon the ratios of
metals used, could be good. The only bike frame of which I'm aware
that was pure magnesium was the Kirk precision, which used a casting
instead of tubes. It had problems with cracking, which is precisely
what I'd have expected.


More recently, Pinarello introduced a model in 2003 with magnesium
alloy main triangle tubes and chainstays. The current version is
profiled at
http://www.pinarello.com/eng/dogma_FP01_scheda.php


-------------------------------
John Dacey
Business Cycles, Miami, Florida
http://www.businesscycles.com
Since 1983
Our catalog of track equipment: online since 1996
-------------------------------

All I know is that it's incredibly hard to work with, not appreciably better
than scandium aluminum, extremely expensive, and corrosive unless properly
treated (see first generation magnesium stems from ITM and Easton). I think
it's all exotic sex appeal and nothing else.

Ride lugged steel.


"Werehatrack" wrote in message
news
On 24 Oct 2004 16:41:10 -0700, (Randall Shimizu)
wrote:

Reynolds MZM magesium tubing
(https://vault2.secured-url.com/reynolds/magnesium.html)

I noticed recently that Reynolds is now producing a MZM magnesium
tubing. Has anyone had any experience or technical knowledge of
magnesium frames....???

While Reynolds is a name that I would ordinarily trust, magnesium is a
material that I wouldn't. The tubing in question, however, is
described as a magnesium *alloy*, and depending upon the ratios of
metals used, could be good. The only bike frame of which I'm aware
that was pure magnesium was the Kirk precision, which used a casting
instead of tubes. It had problems with cracking, which is precisely
what I'd have expected.


--
Typoes are a feature, not a bug.
Some gardening required to reply via email.
Words processed in a facility that contains nuts.

In article ,
Werehatrack wrote:

On 24 Oct 2004 16:41:10 -0700, (Randall Shimizu)
wrote:

Reynolds MZM magesium tubing
(https://vault2.secured-url.com/reynolds/magnesium.html)

I noticed recently that Reynolds is now producing a MZM magnesium
tubing. Has anyone had any experience or technical knowledge of
magnesium frames....???

While Reynolds is a name that I would ordinarily trust, magnesium is a
material that I wouldn't. The tubing in question, however, is
described as a magnesium *alloy*, and depending upon the ratios of
metals used, could be good. The only bike frame of which I'm aware
that was pure magnesium was the Kirk precision, which used a casting
instead of tubes. It had problems with cracking, which is precisely
what I'd have expected.

The Pinarello Dogma is made from Dedacciai magnesium tubing; here's some
advertising hype:
http://www.competitivecyclist.com/za...&PRODUCT.ID=39

On the Pinarello site, they have a breakdown of the alloys:
92-96% mag, 5.8-7.2% aluminum, .15-.5% manganese, .04-1.5% zinc and .45% of
something I can't read (could be "altro, whatever that is - perhaps
contaminents). It does take a bit of skill to weld the stuff properly, but
they say it is more resistant to denting than thin wall aluminum frames
(perhaps because it has a greater wall thickness). Cracking would certainly
be a fear, but corrosion would be the greater issue, with a resulting loss
of strength. I imagine Pinarello has gone to great lengths to sort that
issue out.

--
tanx,
Howard

"It looks like the squirrel's been showing everybody
where he keeps his nuts."

remove YOUR SHOES to reply, ok?

On Mon, 25 Oct 2004 03:56:14 GMT, Howard Kveck
wrote:

The Pinarello Dogma is made from Dedacciai magnesium tubing; here's some
advertising hype:
http://www.competitivecyclist.com/za...&PRODUCT.ID=39

On the Pinarello site, they have a breakdown of the alloys:
92-96% mag, 5.8-7.2% aluminum, .15-.5% manganese, .04-1.5% zinc and .45% of
something I can't read (could be "altro, whatever that is - perhaps
contaminents). It does take a bit of skill to weld the stuff properly, but
they say it is more resistant to denting than thin wall aluminum frames
(perhaps because it has a greater wall thickness). Cracking would certainly
be a fear, but corrosion would be the greater issue, with a resulting loss
of strength. I imagine Pinarello has gone to great lengths to sort that
issue out.

Perhaps, though it's also possible that they are figuring that the
frames will not get enough flexing in use for cracking to be a
problem, and they may just be making naive assumptions about the
long-term properties of the material and its coatings when it comes to
corrosion. Personally, I would not want to trust a mag alloy in which
that element was the predominant component. I think we'll just have
to wait and see what happens, though; perhaps these will yield better
results than have been seen in other Mg applications. I'm not sure
that I'd bet my own money on the longevity of them, though, in either
direction.
--
Typoes are a feature, not a bug.
Some gardening required to reply via email.
Words processed in a facility that contains nuts.

In article ,
Werehatrack wrote:

Perhaps, though it's also possible that they are figuring that the
frames will not get enough flexing in use for cracking to be a
problem, and they may just be making naive assumptions about the
long-term properties of the material and its coatings when it comes to
corrosion. Personally, I would not want to trust a mag alloy in which
that element was the predominant component. I think we'll just have
to wait and see what happens, though; perhaps these will yield better
results than have been seen in other Mg applications. I'm not sure
that I'd bet my own money on the longevity of them, though, in either
direction.

Those are good points, and pretty much mirror my thoughts on these
frames. Particularly the longevity part (I'm riding a ten year old titanium
frame).

--
tanx,
Howard

"It looks like the squirrel's been showing everybody
where he keeps his nuts."

remove YOUR SHOES to reply, ok?

"Howard Kveck" wrote in message
...
In article ,
Werehatrack wrote:

On 24 Oct 2004 16:41:10 -0700, (Randall Shimizu)
wrote:

Reynolds MZM magesium tubing
(https://vault2.secured-url.com/reynolds/magnesium.html)

I noticed recently that Reynolds is now producing a MZM magnesium
tubing. Has anyone had any experience or technical knowledge of
magnesium frames....???

While Reynolds is a name that I would ordinarily trust, magnesium is a
material that I wouldn't. The tubing in question, however, is
described as a magnesium *alloy*, and depending upon the ratios of
metals used, could be good. The only bike frame of which I'm aware
that was pure magnesium was the Kirk precision, which used a casting
instead of tubes. It had problems with cracking, which is precisely
what I'd have expected.

The Pinarello Dogma is made from Dedacciai magnesium tubing; here's
some
advertising hype:
http://www.competitivecyclist.com/za...&PRODUCT.ID=39

On the Pinarello site, they have a breakdown of the alloys:
92-96% mag, 5.8-7.2% aluminum, .15-.5% manganese, .04-1.5% zinc and .45%
of
something I can't read (could be "altro, whatever that is - perhaps
contaminents).

I'd go for 'others'.

Peter