lasco alloy cranks & dilatation ?

Does that ring a bell to anyone ?

Basically we were riding in the snow this we, with lasco alloy cranks & we
discovered that after 2 hours the crank was loose on the axle. The day after, at
home, the crank was back at normal. Is there some kind of dilatation going on
with the lasco alloy ?

The montreal uni-team :slight_smile:

opaugamATaptilonDOTcom !

Re: lasco alloy cranks & dilatation ?

Olivier Paugam wrote:

> Does that ring a bell to anyone ?
>
> Basically we were riding in the snow this we, with lasco alloy cranks & we
> discovered that after 2 hours the crank was loose on the axle. The day after,
> at home, the crank was back at normal. Is there some kind of dilatation going
> on with the lasco alloy ?

Interesting theory. I’ve had trouble with Lasco’s staying tight, but I think
they’re just getting distorted. I’ve had one crank out of each of two sets
do this now.

I didn’t notice the temperature around when all that was happening, but we’ve
had some extreme weather and the unicycle’s been in the trunk of my car most
of the time.

On the other hand, once these got loose for me, I was never able to keep them
tight for more then 10-15 minutes again. So I don’t think it was due to thermal
expansion, at least not in it’s final form. Perhaps thermal expansion allowed it
to loosen up enough that it was damaged by the hub before I noticed it?

Greg

Re: dilatation AND giraffes

I just wanted to add to this an odd thing observed a few months ago: Giraffes
make unpleasant noises when you push them (like, while riding another uni for a
few blocks) if the weather gets to cold. I sounds (and feels) like the metal is
contracting and expanding as you ride. I will ask some Giraffe experts I know to
see if they have found this, too. I will also ask some zoologists to find out
what they know about giraffe noises.

  • David

ghouse@spammenot.southwind.net writes:
>> Basically we were riding in the snow this we, with lasco alloy cranks & we
>> discovered that after 2 hours the crank was loose on the axle. The day after,
>> at home, the crank was back at normal. Is there some kind of dilatation going
>> on with the lasco alloy ?
>
>Interesting theory. I’ve had trouble with Lasco’s staying tight, but I think
>they’re just getting distorted. I’ve had one crank out of each of two sets do
>this now.
>
>I didn’t notice the temperature around when all that was happening, but we’ve
>had some extreme weather and the unicycle’s been in the trunk of my car most of
>the time.
>
>On the other hand, once these got loose for me, I was never able to keep them
>tight for more then 10-15 minutes again. So I don’t think it was due to thermal
>expansion, at least not in it’s final form. Perhaps thermal expansion allowed
>it to loosen up enough that it was damaged by the hub before I noticed it?