Here is my review on some cranks that are being sold on the web.
In a recent copy of the Japan Unicycle Association magazine, there were
some interesting cranks they had for sale. Since there was a website
(http://www.mys-co.com/), I checked it out. When I first went to the
website it was all in Japanese and from what I could tell didn’t have too
much (a work in progress). I checked back recently and found that they
were open for business. And, the cranks that I thought looked really nice
were on sale on this website (the website was in English as well as
Japanese). These cranks are Aluminum and come in sizes of 89 mm, 102 mm,
114, mm, 125 mm, and 170 mm. The special that they had going on was for a
set of three cranks. I chose the 102, 114, and 125 mm. With shipping, the
cost was about $40 per set. Kind of pricey but I figured if they were
lightweight and strong, then it would be well worth the money.
I got them within four days. Pretty amazing since they were coming from
Japan. As soon as I opened up the package I was immediately disappointed.
The cranks were all cut down from 170 mm (I knew this because the 170 mm
was stamped on them). Cut down means that the extra length is removed and
a new hole for the pedal is tapped. Usually, this means that the crank is
not as strong. But, if it is good quality Aluminum then it shouldn’t
matter. I figured while it didn’t look as nice, only I would really be
the one to notice. I put on 114 mm on my artistic uni and did some
tricks. But, within 2 minutes, they had bent. They had bent so bad that
there was no hope in salvaging them. The skill that I bent them on was
called side hopping. Side hopping is somewhat hard on cranks but all my
other cranks don’t seem to mind (I do this skill a lot). I’m guessing
that even if I avoided side hoping, I would have bent the cranks just
jumping around or even going off curbs. I weigh 140 pounds so I’m
guessing some of the heavier riders would have bent them just by looking
cross-eyed at them. The cranks bent in two places: where the pedal is
attached and at the base of the crank. Having it bend at the base of the
crank makes me think all the cranks (of any size) are no good. If I were
to use the 170 mm cranks, it would have put more force on the cranks and
they would bend even easier.
My suggestion is to avoid those cranks. I still have two other sets of
these cranks (102 and 125). I will use the shorter cranks on a kids uni
(hopefully they won’t bend too quick) or on my distance 28” where
hopefully the stresses aren’t too much for the cranks.
I’ll send an email to MYS and talk to them about the cranks. There is a
possibility that I got a bad batch. If I hear anything else about the
cranks, I’ll be sure to post a message.
PS. I’ll bring the bent set of cranks to Nationals for your viewing
Andy Cotter - Andy.Cotter@OutTech.com Unicycle Video “One Wheel - No
Limit” - http://www.tcuc.org/nolimit/ Twin Cities Unicycle Club -
http://www.tcuc.org European Unicycle Tour -
http://www.outtech.com/Unicycle/EUT/ International Unicycling Federation