Re: bicycle computer showing incorrect/no speed
- From: "Shaun aRe" <shaun_are@xxxxxxxxxxxxxxxxx>
- Date: Thu, 11 Aug 2005 11:48:08 +0100
"Ted" <ted@xxxxxxxxxxx> wrote in message
news:42f8cef4$1@xxxxxxxxxxxxxxxxxxxxxxxx
> I recently had a sigma BC 1200 computer installed on my bike. I bought it
> and paid for installation at a reputable bike shop. On the 15km ride home
> everything appeared to work, but the next day I took my bike out for a
short
> ride and immediately noticed that the display was showing my speed at
either
> below my speed (half, a third etc) or at 0kmh. When the bike is
stationary
> I can spin the wheel and the speed will usually show what I'm guessing is
> the correct speed. The next ride I was getting 0kmh most of the time,
other
> than right turns. I'm thinking that the right turns move the magnet
> slightly closer.. Anyway in the manual it does say that the magnet should
> be 5mm max. from the sensor/switch. The closest it reaches is about 8mm.
Is
> this the likely cause? I would usually trust the manual, but I'd also
like
> to think I can trust this bike shop.. What do you think? btw the
computer
> has not been exposed to any rain.
>
> Thanks, Ted
Move them closer together by sliding the magnet down the spokes closer to
the hub if possible, and the sensor further down the fork leg to match.
Shaun aRe - I made my own magnet out of 3 neodymium (sp?) disc magnets
stacked, and zip tied them to the spokes inside an old piece of inner tube -
I can set a passing riders computer off with the thing.
.
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