Semcycle hardware troubles

Semcycle hardware troubles

Post by David C Lawren » Sat, 09 Sep 1995 04:00:00


Everyone who owns a Semcycle, please raise your hand.

Everyone who does NOT need to carry along a toolkit with you anytime
you ride more than a mile, put your hand down.

How many of you still have your hands up?

I'm more than a little frustrated over two mechanical problems I have
been having with my recently aquired 20" Semcycle.  After having been
away from the sport for several years following the theft of my
Schwinn back around 1989 (who the hell steals a unicycle?!), I bought
the Semcycle in August from the Juggling Capitol in Washington, DC.
It was delightful to discover that I still knew how to ride, and
nostalgic to remind myself how much my crotch hates unicycle seats.

So what are the hardware problems I am having?  

Number one is a slow leak.  Over a two mile ride I can lose as much as
3 PSI in the tyre.  It also loses air when I am not riding, but I do
not know at what rate.  As much as 10psi over two days of not using it
has been observed.  It basically means that I have to inflate the tyre
every single time I am going to use it, even for the return commute
home in the evening when I'd just ridden it in ten hours earlier.

The other problem, much more frustrating, is with the left crank.  The
retainer nut loosens up, eventually enough so that the crank loosens
up on the axel and gets progressively worse, the point where it can
just be pulled off.  I thought I had this problem***ed when I really
tightened down the nut so much that I was afraid of stripping the
threads.  It was further down (ie, tighter) on the bolt than the right
crank.  This worked fine for maybe a dozen miles, but just two nights
ago, in the middle of my commute, it went from rock solid to
completely off in less than half a mile.  This was especially annoying
as I couldn't even put it back on and tighten it up because not only
had the dust/retainer cap fallen off, but the nut had also come
completely off the axel and was lost.

This weekend I intend to get to hardware store and find a new nut, and
probably thread lock it as a prophylactic against this happening
again.  But still, even with such a solution at hand, it bothers me
that I have been having these problems.  What are your opinions?

 
 
 

Semcycle hardware troubles

Post by Iain Hibbe » Sun, 10 Sep 1995 04:00:00


Quote:
> Everyone who owns a Semcycle, please raise your hand.
> Everyone who does NOT need to carry along a toolkit with you anytime
> you ride more than a mile, put your hand down.
> How many of you still have your hands up?

well, I have a 24" Sem XL trainer and don't seem to have had the
mechanical trouble you are having..

I would say, see if you can get a cycle mechanic to look at the crank,
you can fix it yourself (there was some discussion on the mailing list
not too long ago), but it seems to me that a mechanic would be more
experienced at it and get it right first time..  if it keeps getting
loose, then it damages the fittings and will be expensive to fix.  once
its fixed right, then it shouldn't give any trouble again.

the inner tube could be a leaky valve, when I got mine it had one of
those small fitting valves, and I don't understand how they work.. I
could never get it right and all the air kept leaking out, I replaced
the inner tube with a new one with a larger fitting valve (like a car
valve) and it works much better, though I don't technically know if
the valve is up to the pressure requirements.

--
]ain

 
 
 

Semcycle hardware troubles

Post by Doug Borngass » Sun, 10 Sep 1995 04:00:00

Quote:
>Everyone who owns a Semcycle, please raise your hand.

>Everyone who does NOT need to carry along a toolkit with you anytime
>you ride more than a mile, put your hand down.

>How many of you still have your hands up?

I just got a 26" Semcycle a couple of months ago and haven't started
carrying a tool kit yet.   I have done some agressive riding out in the
dirt over 7-8 miles with no problems while on the trail.

That is not to say I haven't had any problems.  My tire seems fine still
even though I've ridden it over some dubious ground in the desert.  Just
last week though, I had problems with the left crank.  It started coming
loose so I immediately stopped riding and walked until I could tighten it
back up.  Luckly it wasn't too far a walk to my tools.  I have heard how
bad it is to ride on a loose cotterless crank so by stopping quickly I hope
I have avoided any further problems.  (I'll find out later today when I go
out for another long ride.)
I think my crank might have come loose from letting a friend attempt
learning my particularly high seat.  He wasn't too stable and sent it down
hard.

     _  _              Doug Borngasser
    (o)(o)             San Diego CA

     \__/  You know you're a unicyclist when walking feels strange.

 
 
 

Semcycle hardware troubles

Post by Andy » Mon, 11 Sep 1995 04:00:00

I have had my Semcycle XL for 6 months or so and have not had any troubles
with it. Nothing has ever come loose. I do know a friend (Paul Halter) who
got a Semcycle XL maybe 5 months ago to learn on and he has the loose
crank problem. I learned on an old Schwinn then bought the Semcycle.

Andy Arhelger