More carbon fiber adventure

On Friday, August 24, 2012 10:30:58 AM UTC-5, Frank Krygowski wrote:
It occurs to me now that I may be able to direct him to that American

company that repairs carbon frames. Can someone remind me about it?

Craig Calfee advertises carbon frame repair.

On Aug 24, 11:29*am, "
wrote:
On Friday, August 24, 2012 10:30:58 AM UTC-5, Frank Krygowski wrote:
It occurs to me now that I may be able to direct him to that American

company that repairs carbon frames. *Can someone remind me about it?

Craig Calfee advertises carbon frame repair.

Or here in PDX we have Ruckus: http://www.ruckuscomponents.com/

-- Jay Beattie.

On Friday, August 24, 2012 11:29:07 AM UTC-7, wrote:
On Friday, August 24, 2012 10:30:58 AM UTC-5, Frank Krygowski wrote:

It occurs to me now that I may be able to direct him to that American



company that repairs carbon frames. Can someone remind me about it?



Craig Calfee advertises carbon frame repair.

That's right Calfee repairs carbon frames and does an excellent job:

http://www.calfeedesign.com/repair/

Check out some examples of his work he

http://www.calfeedesign.com/repair/r...amples-photos/

Good Luck!

On Aug 24, 7:51*am, Lou Holtman wrote:
Op 24-8-2012 14:55, (PeteCresswell) schreef:

Per Lou Holtman:
If it is not an impact crash and only a 'slider' I
doubt that the frame/fork need to be replaced.

I can't recall the activity, but remember reading that in some
applications if a carbon-fiber component is scratched (deeply
enough?) *it needs tb replaced for safety reasons.

With a slider the bike doesn't touch the ground in 95% of the cases.
Half of your body is between the bike and the ground. After that the
pedal touches the ground and the RD or QR.
All my (few) crashes were sliders. Not one bike was scratched.

I've crashed on gravel over asphalt (not quite chip seal, which is
worse) -- and it hurt like a MF and left some pretty good scars due to
the embedded gravel, and it ruined my shorts and jersey, but my frame
wasn't touched. Some components got dinged up -- rear QR, pedal end,
bars, brake lever, etc. Typical slider casualties.

The fork does not see that much force when it washes out, and it
doesn't take a direct impact, but maybe this particular fork got
dragged through a gravel drift and got all scratched up, so like Peter
said, the mechanic may see this as a reason for replacing the fork,
and maybe the frame -- although dings can be repaired. Sounds like a
reactive mechanic or maybe a little hysteria.

-- Jay Beattie.

Jay Beattie wrote:
:On Aug 24, 7:51Â*am, Lou Holtman wrote:
: Op 24-8-2012 14:55, (PeteCresswell) schreef:
:
: Per Lou Holtman:
: If it is not an impact crash and only a 'slider' I
: doubt that the frame/fork need to be replaced.
:
: I can't recall the activity, but remember reading that in some
: applications if a carbon-fiber component is scratched (deeply
: enough?) Â*it needs tb replaced for safety reasons.
:
: With a slider the bike doesn't touch the ground in 95% of the cases.
: Half of your body is between the bike and the ground. After that the
: pedal touches the ground and the RD or QR.
: All my (few) crashes were sliders. Not one bike was scratched.

:I've crashed on gravel over asphalt (not quite chip seal, which is
:worse) -- and it hurt like a MF and left some pretty good scars due to
:the embedded gravel, and it ruined my shorts and jersey, but my frame
:wasn't touched. Some components got dinged up -- rear QR, pedal end,
:bars, brake lever, etc. Typical slider casualties.

I crashed on sand on pavement a few years ago. I stopped pretty
quickly, the bike kept going, and slid into opposite ditch. If that
happened to frank's friend, I could see the bike getting damaged.






--
sig 8

On Aug 24, 4:30*pm, Frank Krygowski
wrote:
Lou Holtman wrote:
Op 24-8-2012 5:26, Frank Krygowski schreef:
I just got an email from a cycling friend who lives a couple hundred
miles from me, a guy who emails me fairly often. He says he was riding
his new carbon fiber time trial bike on a familiar downhill bend. But
the brand new chip & seal surface near the bottom was not familiar at
all. The road surface had previously been asphalt, but surprise! Now
it's loosely packed gravel, at least until motor vehicle traffic
compacts it and kicks aside the excess.

He slid out and has some road rash. Apparently the crash wasn't very
bad, but his favorite bike mechanic at the shop where he bought the
bike, says the fork must be replaced, and perhaps the entire frame.

We need more data Frank. Post the original Email and some photo's of the
damaged frame/fork. If it is not an impact crash and only a 'slider' I
doubt that the frame/fork need to be replaced. I don't believe just
stories.

Feel free to disbelieve. *I won't post an email from a friend here,
unless he asks me to go to this group for technical help - something
that's very unlikely.

I don't know if the bike impacted a fixed object after sliding out, or

If he didn't KO, was walking and talking and all his fingers and
thumbs were working then it's unlikely that the forks sustained
damage.

if there was some other factor that led his mechanic to recommend
replacement of the fork and perhaps the frame.

Gambling debt and an empty till?

*I don't know if the
mechanic is correct in his assessment. *The only detail I omitted was
his claim that his "old steel road bike would have taken the fall much
better."

It occurs to me now that I may be able to direct him to that American
company that repairs carbon frames. *Can someone remind me about it?

yes.

He said "This is my first carbon fiber bike, and they are so fragile!"

Another ignorant friend of yours that didn't know this could happen?

This guy is a very dedicated and competent cyclist, Lou, and has done
tons of work for many decades to make things better for cyclists.
Perhaps he made an inappropriate equipment choice, but that doesn't
justify your insult.

Lou, don't fall.

Good idea. *Take your own advice. *[Lou: "All my (few) crashes were
sliders."]

--
- Frank Krygowski

there's an American company that repairs carbon framesm or is it happy
to take your money?

bfd wrote:
On Friday, August 24, 2012 11:29:07 AM UTC-7, wrote:
On Friday, August 24, 2012 10:30:58 AM UTC-5, Frank Krygowski wrote:

It occurs to me now that I may be able to direct him to that American



company that repairs carbon frames. Can someone remind me about it?



Craig Calfee advertises carbon frame repair.

That's right Calfee repairs carbon frames and does an excellent job:

http://www.calfeedesign.com/repair/

Check out some examples of his work he

http://www.calfeedesign.com/repair/r...amples-photos/

Good Luck!

Thanks, guys. I'll pass the links along to him.

--
- Frank Krygowski

Lou wrote:
Op 24-8-2012 15:49, thirty-six schreef:
On Aug 24, 4:26 am, Frank Krygowski
wrote:
I just got an email from a cycling friend who lives a couple hundred
miles from me, a guy who emails me fairly often. He says he was riding
his new carbon fiber time trial bike on a familiar downhill bend. But
the brand new chip & seal surface near the bottom was not familiar at
all. The road surface had previously been asphalt, but surprise! Now
it's loosely packed gravel, at least until motor vehicle traffic
compacts it and kicks aside the excess.

He slid out and has some road rash. Apparently the crash wasn't very
bad, but his favorite bike mechanic at the shop where he bought the
bike, says the fork must be replaced, and perhaps the entire frame.

He said "This is my first carbon fiber bike, and they are so fragile!"

--
- Frank Krygowski

Seems odd to me. I've not managed to scratch a fork blade by simply
sliding out. I;ve taken off bar tape, ripped brake lever hoods and
sculpted brake levers, and I've managed to tear off a little tyre
tread and scrape a rim. Forks generally stay clear of the road unless
they've already snapped. I am well experienced in testing bicycle
lean angles, forks do not get scratched from a simple slide. May be
there is some other factor to this story such as failure to adequately
tighten front axle?

Or it is one of Franks bed time stories ;-)
Lou



Every material has its strengths and weaknesses. Metal corrodes, fatigues, bends and dents. CF can delaminate from crushing and has poor abrasion resistance. Steel and CF are, at least in theory, repairable. Al and Ti, less so.

I think it's good to understand the limits of materials when choosing bike components.
--
Android Usenet Reader
http://android.newsgroupstats.hk

On Aug 26, 12:10*pm, "Peter Cole" wrote:
Lou wrote:
Op 24-8-2012 15:49, thirty-six schreef:
On Aug 24, 4:26 am, Frank Krygowski
wrote:
I just got an email from a cycling friend who lives a couple hundred
miles from me, a guy who emails me fairly often. *He says he was riding
his new carbon fiber time trial bike on a familiar downhill bend. *But
the brand new chip & seal surface near the bottom was not familiar at
all. *The road surface had previously been asphalt, but surprise! Now
it's loosely packed gravel, at least until motor vehicle traffic
compacts it and kicks aside the excess.

He slid out and has some road rash. *Apparently the crash wasn't very
bad, but his favorite bike mechanic at the shop where he bought the
bike, says the fork must be replaced, and perhaps the entire frame.

He said "This is my first carbon fiber bike, and they are so fragile!"

--
- Frank Krygowski

Seems odd to me. *I've not managed to scratch a fork blade by simply
sliding out. *I;ve taken off bar tape, ripped brake lever hoods and
sculpted brake levers, and I've managed to tear off a little tyre
tread and scrape a rim. *Forks generally stay clear of the road unless
they've already snapped. * I am well experienced in testing bicycle
lean angles, forks do not get scratched from a simple slide. *May be
there is some other factor to this story such as failure to adequately
tighten front axle?

Or it is one of Franks bed time stories ;-)
Lou

Every material has its strengths and weaknesses. Metal corrodes, fatigues, bends and dents. CF can delaminate from crushing and has poor abrasion resistance. Steel and CF are, at least in theory, repairable. Al and Ti, less so.

I think it's good to understand the limits of materials when choosing bike components.
--
Android Usenet Readerhttp://android.newsgroupstats.hk

Aluminium is certainly repairable, it's just that the skills are
rare. There is now a special welding rod which makes the process
simpler, but essentially one needs to wire-brush under a flux to
remove the oxide. I've not seen titanium repaired..

Op 26-8-2012 13:10, Peter Cole schreef:


Lou wrote:
Op 24-8-2012 15:49, thirty-six schreef:
On Aug 24, 4:26 am, Frank Krygowski
wrote:
I just got an email from a cycling friend who lives a couple hundred
miles from me, a guy who emails me fairly often. He says he was
riding
his new carbon fiber time trial bike on a familiar downhill bend. But
the brand new chip & seal surface near the bottom was not familiar at
all. The road surface had previously been asphalt, but surprise! Now
it's loosely packed gravel, at least until motor vehicle traffic
compacts it and kicks aside the excess.

He slid out and has some road rash. Apparently the crash wasn't very
bad, but his favorite bike mechanic at the shop where he bought the
bike, says the fork must be replaced, and perhaps the entire frame.

He said "This is my first carbon fiber bike, and they are so fragile!"

--
- Frank Krygowski

Seems odd to me. I've not managed to scratch a fork blade by simply
sliding out. I;ve taken off bar tape, ripped brake lever hoods and
sculpted brake levers, and I've managed to tear off a little tyre
tread and scrape a rim. Forks generally stay clear of the road unless
they've already snapped. I am well experienced in testing bicycle
lean angles, forks do not get scratched from a simple slide. May be
there is some other factor to this story such as failure to adequately
tighten front axle?

Or it is one of Franks bed time stories ;-)
Lou



Every material has its strengths and weaknesses. Metal corrodes,
fatigues, bends and dents. CF can delaminate from crushing and has poor
abrasion resistance. Steel and CF are, at least in theory, repairable.
Al and Ti, less so.

Ti is perfectly repairable and the only framematerial were it is
worthwile to do so IMO. The result is as good as new. What is the point
in trying to repair a cheap Al or steel frame were the result is not as
good as new. Sentimental value?


I think it's good to understand the limits of materials when choosing
bike components.

Of course. That is my point in the first place. Frank picture just a one
sided view. That bugs me.

Lou