Hincapie's broken fork in Paris-Roubaix



On 12 Apr 2006 02:15:42 GMT, Mike DeMicco
<[email protected]> wrote:

>What's the point of an aluminum steerer over steel? I can see in larger
>diameters aluminum has a strength to weight advantage over steel, but in
>small diameters? No. I can't help but think if the steerer tube of this
>fork were made of steel then it wouldn't have failed.


An aluminum steerer of the same weight as a standard steel one would be
pretty thickwalled, and I think also stronger than the steel one. With a
threadless headset and stem, the ID doesn't *have* to be 22.2 mm.

Jasper
 
On Fri, 14 Apr 2006 14:13:27 GMT, RonSonic <[email protected]>
wrote:

>
>Here's the picture we've been waiting for:
>http://www.cyclingnews.com/photos/2...p?id=roubaix_postbikes/Hincapie_Bike_Close_up
>
>
>Now stop the stupid bickering and diagnose this freeking disaster.
>
>Ron


Looks to be an indent where one of the star nut tangs dug in, which
would be a nice stress raiser. Perhaps he shoulda used an all carbon
fork, meaning no star nut...

Kinky Cowboy*

*Batteries not included
May contain traces of nuts
Your milage may vary
 
Kinky Cowboy wrote:
> On Fri, 14 Apr 2006 14:13:27 GMT, RonSonic <[email protected]>
> wrote:
>
>
>>Here's the picture we've been waiting for:
>>http://www.cyclingnews.com/photos/2...p?id=roubaix_postbikes/Hincapie_Bike_Close_up
>>
>>
>>Now stop the stupid bickering and diagnose this freeking disaster.
>>
>>Ron

>
>
> Looks to be an indent where one of the star nut tangs dug in, which
> would be a nice stress raiser.


No matter the cause that's some scary ****.

Greg

--
"All my time I spent in heaven
Revelries of dance and wine
Waking to the sound of laughter
Up I'd rise and kiss the sky" - The Mekons
 
In article <[email protected]>,
RonSonic <[email protected]> wrote:

> Here's the picture we've been waiting for:
> http://www.cyclingnews.com/photos/2006/apr06/roubaix06/index.php?id=roubaix_po
> stbikes/Hincapie_Bike_Close_up
>
>
> Now stop the stupid bickering and diagnose this freeking disaster.


Or in smaller form http://tinyurl.com/lsnb9

This is the clearest photo I've seen. It's interesting that it seems to
be snapped off square to the axis of the tube. It also appears to
almost have a chamfer or bevel all the way around the break. That's
weird.

Hmmm. Star nut scored the inside of the tube, causing a notch and
propogation of a crack all the way around the tube?
 
Jasper Janssen wrote:

> Isn't beadblasting the same thing as shot-peening, except with smaller
> particles?


No. For example, in shot peening, the direction of impact is controlled
so that a high proportion is perpendicular to the surface.
Bead-blasting, like sandblasting. is only a cleaning and cosmetic
treatment, for which this is not a concern. If you bead or sandblast a
part previously treated by shot-peening, or regular peening for that
matter, you will lose the effect.\
 
Tim McNamara wrote:
> In article <[email protected]>,
> RonSonic <[email protected]> wrote:
>
>
>>Here's the picture we've been waiting for:
>>http://www.cyclingnews.com/photos/2006/apr06/roubaix06/index.php?id=roubaix_po
>>stbikes/Hincapie_Bike_Close_up
>>
>>
>>Now stop the stupid bickering and diagnose this freeking disaster.

>
>
> Or in smaller form http://tinyurl.com/lsnb9
>
> This is the clearest photo I've seen. It's interesting that it seems to
> be snapped off square to the axis of the tube. It also appears to
> almost have a chamfer or bevel all the way around the break. That's
> weird.
>
> Hmmm. Star nut scored the inside of the tube, causing a notch and
> propogation of a crack all the way around the tube?


Makes me worried about mtn bike suspension forks with aluminum steerers.
That steerer doesn't look all that thin. Could it have just been a
freak failure?

Greg

--
"All my time I spent in heaven
Revelries of dance and wine
Waking to the sound of laughter
Up I'd rise and kiss the sky" - The Mekons
 
On Fri, 14 Apr 2006 10:48:50 -0700, "G.T." <[email protected]>
wrote:

>Tim McNamara wrote:
>> In article <[email protected]>,
>> RonSonic <[email protected]> wrote:
>>
>>
>>>Here's the picture we've been waiting for:
>>>http://www.cyclingnews.com/photos/2006/apr06/roubaix06/index.php?id=roubaix_po
>>>stbikes/Hincapie_Bike_Close_up
>>>
>>>
>>>Now stop the stupid bickering and diagnose this freeking disaster.

>>
>>
>> Or in smaller form http://tinyurl.com/lsnb9
>>
>> This is the clearest photo I've seen. It's interesting that it seems to
>> be snapped off square to the axis of the tube. It also appears to
>> almost have a chamfer or bevel all the way around the break. That's
>> weird.
>>
>> Hmmm. Star nut scored the inside of the tube, causing a notch and
>> propogation of a crack all the way around the tube?

>
>Makes me worried about mtn bike suspension forks with aluminum steerers.
> That steerer doesn't look all that thin. Could it have just been a
>freak failure?
>
>Greg


I've always been worried by star nuts, my bikes have expanders or USE
Safe-T headset compressors

Kinky Cowboy*

*Batteries not included
May contain traces of nuts
Your milage may vary
 
Jasper Janssen wrote:
> On 12 Apr 2006 02:15:42 GMT, Mike DeMicco
> <[email protected]> wrote:
>
> >What's the point of an aluminum steerer over steel? I can see in larger
> >diameters aluminum has a strength to weight advantage over steel, but in
> >small diameters? No. I can't help but think if the steerer tube of this
> >fork were made of steel then it wouldn't have failed.

>
> An aluminum steerer of the same weight as a standard steel one would be
> pretty thickwalled, and I think also stronger than the steel one. With a
> threadless headset and stem, the ID doesn't *have* to be 22.2 mm.
>
>


Sure, but standard steel 1 1/8" steerer tubes have proven plenty strong
over the years. Why would they go to aluminum other than to save
weight? And, of course, any significant weight savings would likely
mean a loss of strength/durability v. the steel steerer.
 
On Fri, 14 Apr 2006 17:14:57 -0700, Mark Hickey <[email protected]> wrote:

>RonSonic <[email protected]> wrote:
>
>>
>>Here's the picture we've been waiting for:
>>http://www.cyclingnews.com/photos/2...p?id=roubaix_postbikes/Hincapie_Bike_Close_up

>
>Not only did it take out George, but too out his "hoes" as well. That
>must have been some crash, huh?


It's hard out here on a pimp.

At the back of the steerer, toward the top tube, is that a small fracture
tangential to the main break that circles the steerer. If that bike's laying
down with the front wheel off, as it appears, that would've been at the side of
the steerer. Previous crash? Looks like it.

Ron
 

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