Cannondale recall

On Friday, July 26, 2019 at 1:25:45 PM UTC-7, AMuzi wrote:
On 7/26/2019 2:11 PM, Tom Kunich wrote:
On Friday, July 26, 2019 at 5:17:47 AM UTC-7, AMuzi wrote:
On 7/25/2019 10:48 PM, Frank Krygowski wrote:
On Thursday, July 25, 2019 at 6:32:51 PM UTC-4, AMuzi wrote:
On 7/25/2019 2:52 PM, Frank Krygowski wrote:
https://gearjunkie.com/cannondale-ca...bicycle-recall

Hmm. The carbon fiber fork may kill you.

But on the other hand, it's nice and light!

- Frank Krygowski


Well, that's true but the history of recalled forks includes
steel and aluminum models as well.

Agreed. My Reynolds 531 tandem fork failed. But that builder error - by builder
Jim Bradford.

- Frank Krygowski


You've mentioned that before and of course we see occasional
anomalies/errors too. In everything.

But a fork recall happens when
design/engineering/material/process has systematically
failed for a particular run of product. Different thing
entirely.

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

"systematic failure" could be a half dozen forks all failing in the same manner. But consider - fork failures are all pretty much the same - steel forks bend almost in the same position on all steel bikes. Aluminum forks all fail just above the dropout or at the connection between the fork and the head. I'm sure it has happened but I haven't seen modern carbon fiber forks fail except in collisions.


Right. Recalls are response to a pattern indicating
systemic failure to some significant level (as opposed to
one-off anomalies).

Uh, "Fork failures are all..." is not quite true.

Steel-
The recalled Bridgestone X-01 fork steerers fell out of the
crowns. Motobécane Grand Touring/Mirage forks had ends not
brazed in, and yet plated over

Viscount recalled aluminum cast forks had random voids in
the lower piece. The steel columns were never a problem.
Peugeot Comete cold process aluminum forks had crown casting
voids as well. Panasonic bonded aluminum tubes had bond
problems (not clean? wrong epoxy? no idea)

Carbon forks have been recalled for voids but also for
crown-to-column bonding with steel and aluminum columns.

If you're talking about crash damage as opposed to recalls
that's also not right. Although many if not most steel
blades curve back in the top 1/3 of the blades when smacked:
http://www.yellowjersey.org/photosfr...t/NIMGAFRK.JPG

Forks also snap off ends, bend or crack steerers and twist
too. I see more wrecked frames than most guys and
categorical statements don't match what I see.

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

I will take your word for it but all of the steel fork failures were exactly like the on in your picture - the upper third of the fork bent since that is where the highest leverage is. I saw them fail not just in accidents such as auto collisions but even early unsuspended MTB's would bend there simply descending through broken ground. By my cousin's house it the hill that Bontrager and the others used to descend on those old Schwinns and Raleighs and it wasn't unusual to see a bike by the side of the road there with the bent fork.

I'm sure you've seen a lot more failures though so I accept your comments as from an expert.