Aluminum will work harden - stressing and pushing it out of shape makes it
stiffer, but more brittle. Forging aluminum is a controlled process to
impart the desired stiffness and strength to a specific aluminum alloy
through work hardening. Think about bending the straight part of a hanger
Cranks don't break because you were so strong you snapped them, like
breaking a stick over your knee. I've had *four* cranks break on me,
three through the pedal eye and one straight across the middle, and one
other that had a crack originating at the pedal eye that I found before
it
I know that people do break cranks but I have never ever understood how? It
just seems like there lots of other things that should fail before the crank
would assuming everything is operating at all less than totally frozen. In any
case, I’m pretty darn sure that I don’t have the strenght to
On Thursday, October 25, 2018 at 4:00:19 PM UTC-7, David Wadstrup wrote:
> Sounds like the WI VBC might be the way to go should I find myself able to
> deal with the black rings.
>
Black chainrings aren't all bad. They mask the chain grease and make filthy
drivetrains look presentable. :)
This is all so much to think about thank you everyone. I'm
particularly appreciative of the run down on gearing. You're right, this
is something the could determine crank choice, and so is something I should
think about a little more deeply before pulling the trigger.
I really wish I
That indeed would be the theoretical reason; not age. Good point.
Next question: is there any useful and accurate *practical* guidance --
rules of thumb -- for retiring aluminum cranks, seatposts, bars, stems, and
so forth?
Bills' reply reminds me of Grant's long-ago and wonderful metaphor:
I carry spare crank arms in my jersey pockets* .
Bill "thunder-thighs" Lindsay
El Cerrito, CA
*I do not actually carry spare crank arms in my jersey pockets, or anywhere
else for that matter
On Thursday, October 25, 2018 at 2:26:26 PM UTC-7, Justin, Oakland wrote:
>
> Well if your legs are
Well if your legs are as heavy as Jan says then you’ll have to get new cranks
soon Billl!
-J
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Somebody claimed to have read somewhere that aluminum weakens over time.
Patrick Moore asked for more details, and sounds skeptical.
I took my materials science classes a fairly long time ago, but you are
right to be skeptical, Patrick Moore. Aluminum most certainly does NOT
change material
"Also, I read some somewhere(maybe a Riv Reader) that metals, and aluminum
in particular, weaken significantly with age."
I'd like to see the article and review the evidence. I myself have heard
nothing said about age as such making metals generally, or aluminum in
particular, less strong.
Personally, I’d go vintage and choose chainrings using a gear chart. I don’t
undersand the concept of “stock” chainrings but it seems people buy whole new
cranks to change gearing. Of course, I friction shift and maybe that’s the
difference but a big reason I prefer friction is because of the
Why have you ruled out the Rene Herse crank?
On 10/25/18 8:23 AM, David Wadstrup wrote:
I’m really unsure about this component choice. There are only two
cranksets currently in production that I’m considering. That I know
of, that is. I’d love to hear of others if you know of any.
1.
I’m really unsure about this component choice. There are only two cranksets
currently in production that I’m considering. That I know of, that is. I’d
love to hear of others if you know of any.
1. White Industries VBC.
This is the one I’d like to choose, but their rings only come in
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