chrisg
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| posted on 2/12/05 at 10:20 PM |
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Bicycle speedo
I'm after some info on bicycle speedo's.
1. Do they have an odometer(mileometer)?
2. How do they detect the speed?
3.Will they pass the MOT?
4. what features are desireable for a Locost/seven?
5. any recommendations?
Any help appreciated.
Thanks in advance.
Chris
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flak monkey
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| posted on 2/12/05 at 10:24 PM |
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1. Yes
2. Reed switch (or proximity sensor) and magnet attached to wheel rim
3. Yes
4. Back lit, read to more than 99mph.
5. Cant remember the recommended ones off the top of my head.
David
Sera
http://www.motosera.com
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miserableoldgit
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| posted on 2/12/05 at 10:27 PM |
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Halfauds apparently sell a good one. Works onHall effect with magnets, smoke and mirrors.
Presumably you fix it to the wheel or propshaft depending on which is easier.
Youth and vitality are wasted on the young
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chrisg
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| posted on 2/12/05 at 10:32 PM |
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Thanks.
I might nip down to Halfords, using my shiny new discount card!
Thought of another question.
What voltage do they run on?
Can they be "Hard wired" to the car?
"2. Reed switch (or proximity sensor) and magnet attached to wheel rim "
is the sensor fixed to, say the wing stay?
How is the magnet fixed to the rim?
Sorry!
Cheers
Chris
[Edited on 2/12/05 by chrisg]
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zzrpowerd-locost
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| posted on 2/12/05 at 10:44 PM |
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Cateye is a good make
Usually have one of those 3v "coin" batteries, last ages
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flak monkey
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| posted on 2/12/05 at 10:48 PM |
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quote:
Originally posted by chrisg
Thanks.
"2. Reed switch (or proximity sensor) and magnet attached to wheel rim "
is the sensor fixed to, say the wing stay?
[Edited on 2/12/05 by chrisg]
You can use araldite or something similar to glue the magnet to the rim.
The sensor needs to be very close to the magnet, i think there are a few people on here who have fitted them to the upright themselves.
And yes, voltage wise they usually run on a 3V lithium battery, which lasts for about 3 years on my bike!
David
Sera
http://www.motosera.com
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Peteff
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| posted on 2/12/05 at 10:57 PM |
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We fitted a Sigma Chris. It read up to 99.9mph then started at O again (allegedly) but there are some that read up to 180mph. The magnet was JB welded
to the rear rim and the wire extended with speaker cable. Sensor bracket was fastened to the bottom shock mount.
[Edited on 2/12/05 by Peteff]
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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Avoneer
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| posted on 2/12/05 at 11:40 PM |
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I had my magnets on one of the CV joint bean cans on the back axles - worked a treat.
Pat...
No trees were killed in the sending of this message.
However a large number of electrons were terribly inconvenienced.
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MkIndy7
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| posted on 3/12/05 at 12:56 AM |
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Some are wireless, and have the 3V cell in the display and in the sensor pick up.
Saves running yet another wire I suppose
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trikerneil
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| posted on 3/12/05 at 07:48 AM |
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I first fitted a Toppeak - looked lovely but the display was so complicated I had trouble actually telling what speed I was doing.
I'm now using a Halfraud's own brand, cost about £8 and works a treat. The backlight only works while you press the button so that's
a problem for the MOT, I had to fit a light that illuminated the display.
Keep the wiring away from the ignition or you'll have a lottery number generator!
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Peteff
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| posted on 3/12/05 at 09:54 AM |
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Some are wireless
I have a wireless one on my pushbike. They don't update fast enough for a car's acceleration and will not read accurately until the speed
is constant.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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skippad
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| posted on 3/12/05 at 11:05 AM |
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One of the problems with bike speedo is when you are accelarating fairly rapidly...
display cant keep up until your at a steady speed.
They are ok until u can afford a digidash!!
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paulf
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| posted on 3/12/05 at 11:59 AM |
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I found the same with mine, i couldnt work out why i couldnt get 0 to 60 under 10 seconds but then tried using the main speedo and found it to be sub
7 secs, so ok for steady speeds and trip mileage average speed etc.
quote:
Originally posted by skippad
One of the problems with bike speedo is when you are accelarating fairly rapidly...
display cant keep up until your at a steady speed.
They are ok until u can afford a digidash!!
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