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PostPosted: Sun Feb 18, 2007 6:13 am 
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Location: North Hills, CA.
Mattias Hellöre wrote:
How stiff is these crank?
I milled away a lot as you can see here.
Very interesting. So now what are you planning?

Terry

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PostPosted: Sun Feb 18, 2007 7:12 am 
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In the same moment I drilled inspection holes in the backside I saw the back section is thick, very thick but I milled away some material to see how it´s inside these cranks.

In this version I will NOT use them on road, too dangerous for 20 gr reduction.

I´ve already ordered new left hand crank.

So be calm guys, Weightweenies don´t need people who only critics people.

I will instead shave off all sharp edges utside and see where the weight lands.

Money is no problem here.

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Posted: Sun Feb 18, 2007 7:12 am 


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PostPosted: Sun Feb 18, 2007 7:23 am 
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Location: Calgary, Canada
why do you taunt people?

and if you are so brave, why not save even more weight by not wearing a helmet?


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PostPosted: Sun Feb 18, 2007 7:27 am 
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evilgeek wrote:
why do you taunt people?

and if you are so brave, why not save even more weight by not wearing a helmet?

Did you save some weight when you removed your brain before a ride? :)

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PostPosted: Sun Feb 18, 2007 7:31 am 
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CGT wrote:
Oh come on man, what have you done to those beautiful cranks?!?!

First of all, as chrism wrote, you've reduced the stiffness quite a lot. Weight saving is good, but not when it affects the stiffness as much as in this case. Second of all, how much weight have you actually saved? Was it worth it?

Anyhow, it's too late now, so at least finish it of nicely by sanding the rough edges so that it looks nice!


That´s not worth the effort or the small weight reduction fron 408 to 397 grams, so you guys know now, don´t make same mistake as me.

I had these cranks lying around in my garage and always wanted see how pretty the inside was.

Poor forging process or welding skill is what I see inside.

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PostPosted: Sun Feb 18, 2007 9:02 am 
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I always thought that the forging process used in the hollowtech technology was revolutionary and no other manufacturer can reproduce it using the materials (sure Campagnolo do hollow carbon as does FSA).

does anyone know of another crank manufacturer who can do this?

the Dura-ace & Ultegra cranks (which are of course the siblings of the XTR) have been proven to be some of the stiffest cranks available. I would imagine the XTR (all generations) cranks to perform similar againt there counterparts.

I've used 950, 952 , 960 and now 970 (currently using the last three at this time on different bikes) and they have my respect.


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PostPosted: Sun Feb 18, 2007 9:21 am 
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The Spider wrote:
I always thought that the forging process used in the hollowtech technology was revolutionary and no other manufacturer can reproduce it using the materials (sure Campagnolo do hollow carbon as does FSA).

does anyone know of another crank manufacturer who can do this?

the Dura-ace & Ultegra cranks (which are of course the siblings of the XTR) have been proven to be some of the stiffest cranks available. I would imagine the XTR (all generations) cranks to perform similar againt there counterparts.

I've used 950, 952 , 960 and now 970 (currently using the last three at this time on different bikes) and they have my respect.


I think Cannondale have their HollowGram technology, If it´s exactly same process, I let other tell us that.
But their former CODA (Magic Motorcycle) cranks was glued together.

I always think the XTR group was far better than anything else - adjusted and in good condition.

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PostPosted: Sun Feb 18, 2007 7:40 pm 
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Location: Warsaw Poland, Akureyri Iceland
Somebody stop that guy! :)
This hurts me because I really work hard to buy bicycle parts. He just destroys them!

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PostPosted: Sun Feb 18, 2007 7:44 pm 
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pacho wrote:
Somebody stop that guy! :)
This hurts me because I really work hard to buy bicycle parts. He just destroys them!


Shop a little more in Ebay so you can find bargains :)
I rarely pay retail price for parts..

What will be next object to destroy, something really expensive ;)

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PostPosted: Mon Feb 19, 2007 12:19 am 
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Location: Ontario, Canada
yeah, good idea, maybe do the same milling to a pair of Clavicula's :twisted: or drill a lot of holes in a Scott Spark frame


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PostPosted: Mon Feb 19, 2007 6:06 am 
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Location: New Zealand
Mattias...have you thought about a "next" (raceface) sort of option with this one? ....could make an interesting project!
As for the "stop it's painful" brigade.....many a good part died in the name of progress.....relax! Some of us push the boundary waaaaay past where it should go so we recognise where the "SO ..... THAT DOESN'T WORK" point is......it's sometimes easier to work from the wrong end, back to the beginning. I do prototypes all the time (admittedly, NOT with xtr cranks...but it's all a matter of budget). I think Mattias has indicated this pretty clearly in his posts.

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Edit: HAD a decent race! 16/08/2014 :)


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PostPosted: Mon Feb 19, 2007 7:04 am 
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Mattias, this has been a very interesting thread to me.

:idea:

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PostPosted: Mon Feb 19, 2007 7:54 am 
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Theremery: I may take wrong words or use a arasive attitude but I will get the job done, if it don´t work I´m not late with the truth.

These XTR cranks will get sharp corners to great radius treatment, more pleasing to eye and better visual result and hopefully lighter weight.

Shovelon: thanks, maybe useless for you but I know now how the cranks see inside, the pics on web is too pretty.

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PostPosted: Mon Feb 19, 2007 8:35 am 
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I think your work is pretty cool. Keep it up :)

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Edit: HAD a decent race! 16/08/2014 :)


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PostPosted: Mon Feb 19, 2007 8:48 am 
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Location: Warsaw Poland, Akureyri Iceland
Mattias, could you take some more pics? I'd like to know how it looks inside.
This is crazy :)

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Posted: Mon Feb 19, 2007 8:48 am 


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