Crank Failiure

Fat rider or manufacturing defect… you decide! This is (was) a 140mm
(5.5") Lasco crank which just snapped without warning, as I joined the EUT
crew somewhere in Germany/Luxembourg, I’ve done less than 200 miles on it,
interesting stuff… I think its a one off - anyone else had any similar
troubles with this type of crank?

http://sdg_hols.tripod.com/crank_failiure.jpg

                        |
  Simon Greenway | I.O.U O
I.O.U@mindless.com | | Romsey, Hampshire, UK. | Idiots On
    Unicycles \#/
                        | <a href="http://come.to/muni">http://come.to/muni</a> o

         crank cracking is what we do best.

— Idiots on Unicycles <6x@postmaster.co.uk> wrote:
> This is (was) a 140mm (5.5") Lasco crank which just snapped without
> warning, as I joined the EUT crew somewhere in Germany/Luxembourg, I’ve
> done less than 200 miles on it, interesting stuff… I think its a one
> off - anyone else had any similar troubles with this type of crank?
>
> http://sdg_hols.tripod.com/crank_failiure.jpg

Through Norco I’ve got an opportunity to convince Lasco to beef up their
short cranks, but they’re looking for bent cranks to look at before they
do anything. Anyone with severely bent Lasco cranks out there? (stupid
question!)- if you could email me a scan of your cranks, or a URL where
the picture is located, that would be great. BTW that link above didn’t
work for me.

Thanks,

Kris Holm.


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> Fat rider or manufacturing defect… you decide!

I’d have to say defect. I’ve never seen a crank break like that, and I
can’t imagine why one would. There was probably a defect somewhere inside
the crank, creating a weak spot.

May your ankles, achilles tendons, knees, and especially “saddle contact
area” hold up for the ride!

John Foss, the Uni-Cyclone jfoss@unicycling.com www.unicycling.com

There can be a fine line between “hobby” and “mental illness.” – scary
reality-check for unicyclists

Kris Holm wrote:

> Through Norco I’ve got an opportunity to convince Lasco to beef up their
> short cranks, but they’re looking for bent cranks to look at before they
> do anything. Anyone with severely bent Lasco cranks out there? (stupid
> question!)- if you could email me a scan of your cranks, or a URL where
> the picture is located, that would be great. BTW that link above didn’t
> work for me.

I wrecked two sets of 170mm Lascos by distorting them around the hub area
(where they hit the square taper). They’d loosen up and start flopping
around and after awhile you couldn’t keep 'em tight.

I don’t have any pictures, but I don’t think photos would show much
anyway, since it was in the square taper area and you couldn’t tell much
just by looking at them.

I sent one of the two bad ones back to Unicycle Source. I may still have
the other one if it’s interesting to them, but I’m not totally sure what I
did with it.

Greg

I don’t know about that. I’ve seen at least one stronger forged Sugino
crank snapped in half just like that by David or Bruce. All this talk
about the 140mm Lasco cranks is making me think twice when I hammer up the
23% grade on my Coker…but after about 100 or 150 miles, no problem yet.

—Nathan

“John Foss” <john_foss@asinet.com> wrote in message
news:52CD02C3DAD2D411A3170002A528514206B7AF@SERVER
> > Fat rider or manufacturing defect… you decide!
>
> I’d have to say defect. I’ve never seen a crank break like that, and I
can’t
> imagine why one would. There was probably a defect somewhere inside the
> crank, creating a weak spot.
>
> May your ankles, achilles tendons, knees, and especially "saddle contact
> area" hold up for the ride!
>
> John Foss, the Uni-Cyclone