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Old August 10th 19, 09:14 PM posted to rec.bicycles.tech
AMuzi
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Posts: 13,447
Default Broken bike frame

On 8/10/2019 3:03 PM, Tom Kunich wrote:
On Friday, August 9, 2019 at 5:38:41 PM UTC-7, AMuzi wrote:
On 8/9/2019 6:39 PM, Tom Kunich wrote:
On Friday, August 9, 2019 at 2:43:18 PM UTC-7, Joerg wrote:
On 2019-08-09 09:18, Tom Kunich wrote:
On Wednesday, August 7, 2019 at 2:51:00 PM UTC-7, AK wrote:
On Wednesday, August 7, 2019 at 12:24:18 PM UTC-5, Tom Kunich
wrote:
On Tuesday, August 6, 2019 at 11:20:11 AM UTC-7, AK wrote:
Anyone experienced a broken bike frame as seen in the upper
right corner of this picture?

https://imgur.com/7i148lV

Andy

This is NOT uncommon with carbon fiber bikes. They generally fail
from internal defects that cannot be detected from outside. The
manufacturing processes are maturing and this happens less often
as time goes on. But it happens enough that Colnago states that
they will not give a warranty of more than three years in the USA
and everywhere else it is only two. The American manufacturers
often give lifetime warranties because you general change bikes
often enough that they are free of warranty burdens pretty
rapidly.


Except if I am the customer. My road bike frame is from 1982 and still
does at least 2500mi/year. More than twice as much as my car. The other
miles are with the MTB, now also five years old.

I used to put around 6000mi/year on it when I was young (and weighed a
lot less). Went up hills in 42/21 like a goat. I don't know how that was
ever possible, now I sometimes need to bail from 42/32 to 42/40.



That's interesting.

I believe my frame is steel.

It's pretty heavy especially when I take it up the stairs.


Doesn't have to be. My steel frame wasn't much heavier than aluminum
bikes that came out in the 90's but, of course, that changed immediately
after I bought it and ruggedized it.


Andy

Steel frames also fail catastrophically. You should have seen the
mess that the early mountain bikes made.

The much higher end steel these days that is welded construction can
be almost as light as a carbon fiber frame built to the weight limits
of the UCI.

I'm presently building a LeMond Zurich made from Reynolds 853
oversize and I'm shooting for the same or less weight than my Colnago
CF bike.


Is that a late 90's frame? I wonder if steel frames deteriorate with
miles that have been put on. Mine should be around 70000mi now.

What I noticed when riding with others is that the steel frame seems to
absorb really rough road sections better than aluminum or CF frames of
other riders. Sometimes they go "Ouch" or "Yikes!" when I don't feel much.

--
Regards, Joerg

http://www.analogconsultants.com/

I have a Basso Loto of the final year. It had oversized tubing to Basso's needs. ("Basso Tubing Concepts") That was from the early 90's I expect. It rides like a dream though I presently have it taken apart getting ready to refinish it. I want to put all of the correct decals on it but that is becoming a real hassle. The sticker for that Basso Tubing Concepts doesn't exist. Even Basso won't answer emails about it. And it uses one old-style Basso headtube decal and one of the new style on the seat tube.

I've talked to decal people and they want to only make them in the stock color. So rather than the Basso in a contrasting color to the new paint (Medium Yellow with red trim around the lugs) they want to make it grey.

Also I would really like to use masks rather than decals and put the Basso labels on in normal paint.


Any commercial graphics house can cut vinyl masks for
painted letters. This is a cheap modern process.

If you want outline letters you'll need a hand
letterer/striper and their time is expensive as anyone who's
good at it is 70 years old now. Check your local motorcycle
painters for a guy who stripes fuel tanks. That's the guy
you want.

I have the 1980s Loto sets:
http://www.yellowjersey.org/BASSYELL.JPG

which do not include the 'Concept Tube' label:
http://www.yellowjersey.org/GAPBB.JPG

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971


That Basso Loto decal set is from several years earlier than the one with the Basso Tubing Concepts sticker. In any case THAT picture looks exactly like the one I sent to the Decal man and he wanted a better picture of it. I have the frame stripped down now and will take the best pictures I can.

I appreciate your advice on finding a commercial graphics man. I have a couple within a mile of my home. I can paint on the Basso and Loto insignia and then have the other stuff as decals.


Vinyl letters look like crap on a bike. But they make a very
useful and affordable paint mask. Spray letter color, allow
to cure then wetsand, apply letters, spray main frame color.
Then remove vinyl, wetsand and clear. That's what Colnago
does on these:

mask-
http://www.yellowjersey.org/photosfr...st/col162o.jpg
color-
http://www.yellowjersey.org/photosfr...st/col162p.jpg

It's tedious work and in my case time-money. YMMV.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971


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