Titanium vs. aluminium

On 12 Aug 2004 16:14:33 GMT, "Arthur Clune"
wrote:
Rick Onanian wrote:
: Speaking of "cranks" and "triple", don't even consider a triple
: crank, especially if you live or ride near any hills. Get a bike
: with a 39-52 crank and a 13-22 cassette.

Don't you mean 42-55 and 11-19?

Nope. Never seen that. It's what I'd use if I only ever went
downhill, I suppose. Also, it's only 9s; in this context, nothing
less than 10s is acceptable.

Not ultra-tall gearing, just ultra-close-ratio. Of course, I can't
imagine what close-ratio-"I can only pedal within 2 rpm of my
optimum cadence"-people do when they get to hills and run out of
gears. Maybe their CF frame and ultra-low handlebars float up the
hill, and they don't bother trying for a new top speed down...
--
Rick Onanian

Corrosion/rust on titanium is quite unlikely.


"Derk" wrote in message
...
| Rick Onanian wrote:
|
| On Tue, 10 Aug 2004 15:39:39 +0200, Derk
| wrote:
| You _discarded_ a titanium frame because of bad welds? I wish I had
| been in your neighborhood on trash day...
| Not just bad welds: it looks like the welds have rust all over them.
Several
| people advised me not to continue riding this frame. It was still under
| guearantee, so in my case "trashed" means "I stopped using it" (got
another
| frame on guarantee).
|
| Greets, Derk

Doug Huffman wrote:

Corrosion/rust on titanium is quite unlikely.
I know, but it shows some odd discolouring. I saw how this got worse over
the period of about 2 years. Something must be wrong here.

The frame was welded in the open air in Russia. I heard of more examples of
frames that had problems.

Anyway, Titanium is advertised as being a material that is ageless and will
be around forever. I paid good money for teh frame and I compared it to 2
other titanium frames I have here (Merckx and Colnago).These frames look
perfect, so why should I accept welds that look like they're rusty?

Greets, Derk

(Tectoron) writes:

What should I choose, I have been offered a titanium frame (some years
old but never used) to the price of an (medium class) new aluminium
frame (ex. E Merxcks ALU Sprint).

One question :

Do you want to replace that frameset in 10 years or 40 ??

I used to ride a carbon/aluminum frameset. Then my seat lug cracked.
My next newer bike will be titanium.

- Don Gillies
San Diego, CA

I, not a welder but dependent on good welds, am of the impression/opinion
that Ti must be welded in an inert atmosphere.


"Derk" wrote in message
...
| Doug Huffman wrote:
|
| Corrosion/rust on titanium is quite unlikely.
| I know, but it shows some odd discolouring. I saw how this got worse over
| the period of about 2 years. Something must be wrong here.
|
| The frame was welded in the open air in Russia. I heard of more examples
of
| frames that had problems.
|
| Anyway, Titanium is advertised as being a material that is ageless and
will
| be around forever. I paid good money for teh frame and I compared it to 2
| other titanium frames I have here (Merckx and Colnago).These frames look
| perfect, so why should I accept welds that look like they're rusty?
|
| Greets, Derk
|

Doug Huffman wrote:

I, not a welder but dependent on good welds, am of the impression/opinion
that Ti must be welded in an inert atmosphere.
Exactly, I read in TOUR Magazin that the Russians claim they have welded all
their spacecraft and subs this way, so according to them there's no problem
with welding with a flame surrounded by some gas other than oxygen.
Pilorget from France, on the other hand, I read, said even some strict
french norms about flooding an airtight welding space were not strict
enough. I guess he really knows what he's doing.

I really recommend inspecting welds before buying any cheapo titanium frame.
Or get yourself possibly into a lot of trouble with guarantee claims.

Greets, Derk

Please read about welding, especially Ti, in a 'welding' magazine. Cyclists
are poor engineers. I doubt even Russians can weld Ti with a 'flame'.


"Derk" wrote in message
...
| Doug Huffman wrote:
|
| I, not a welder but dependent on good welds, am of the
impression/opinion
| that Ti must be welded in an inert atmosphere.
| Exactly, I read in TOUR Magazin that the Russians claim they have welded
all
| their spacecraft and subs this way, so according to them there's no
problem
| with welding with a flame surrounded by some gas other than oxygen.
| Pilorget from France, on the other hand, I read, said even some strict
| french norms about flooding an airtight welding space were not strict
| enough. I guess he really knows what he's doing.
|
| I really recommend inspecting welds before buying any cheapo titanium
frame.
| Or get yourself possibly into a lot of trouble with guarantee claims.
|
| Greets, Derk

On 2004-08-12 13:02:57 -0700, (Donald Gillies) said:

(Tectoron) writes:

What should I choose, I have been offered a titanium frame (some years
old but never used) to the price of an (medium class) new aluminium
frame (ex. E Merxcks ALU Sprint).

One question :

Do you want to replace that frameset in 10 years or 40 ??

Who the hell rides a single frame (on a regular basis) for 15 years?

On Fri, 13 Aug 2004 10:03:41 -0700, Bill Lloyd
wrote:

On 2004-08-12 13:02:57 -0700, (Donald Gillies) said:

(Tectoron) writes:

What should I choose, I have been offered a titanium frame (some years
old but never used) to the price of an (medium class) new aluminium
frame (ex. E Merxcks ALU Sprint).

One question :

Do you want to replace that frameset in 10 years or 40 ??

Who the hell rides a single frame (on a regular basis) for 15 years?

Dear Bill,

I think that Jobst Brandt has been riding the same frame on
a regular basis for at least that long.

Carl Fogel

-----BEGIN PGP SIGNED MESSAGE-----

In article ,
Bill Lloyd wrote:
On 2004-08-12 13:02:57 -0700, (Donald Gillies) said:

(Tectoron) writes:

What should I choose, I have been offered a titanium frame (some years
old but never used) to the price of an (medium class) new aluminium
frame (ex. E Merxcks ALU Sprint).

One question :

Do you want to replace that frameset in 10 years or 40 ??

Who the hell rides a single frame (on a regular basis) for 15 years?


_ Me. I've got a frame that's at least 30 years old and has over
40K miles on it that I ride at least once a week these days. It
got a ten year rest in the 90's when I ventured into MTB.

"A thing of beauty is a joy forever." - John Keats.

_ Booker C. Bense

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