Bike computer for Coker?

There are a fair number of computers that will work with a coker. Some
are also very inexpensive. The best way to tell if a cycle computer
will work is to remove it from the packaging, read the instructions for
set up and then try and set the wheel diameter to coker size. The
limit on the size you can set the diameter to is fairly arbitrary and
vaires from computer to computer. Some allow entry of sizes up to
formats like 999. As long as you can enter the diameter of a coker
wheel in you should be fine.

The other alternative is to buy a second magnet and mount it directly
opposite the first, using half the wheel diameter as your setting.

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peter.bier

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I can state from experience that the Cateye Enduro 8 and the basic
Schwinn computers both can be programmed for the Coker wheel size.

There have been threads on this...you might try a Search for more info.

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tomblackwood

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You can go to the web site for a cycle computer manufacturer and
download the manual for a particular model to find out the specs and
how big of a wheel they'll let you enter. You'll have to do the manual
configuration instead of the presets that are on some computers.

The wheel circumference for the coker is going to be in the 2775 mm to
2800 mm range (or 277 cm to 280 cm range). Most computers have you
enter the value in metric (either mm or cm). There are a bunch of
computers that will let you enter numbers that big or bigger for the
wheel size. More info on the numbers is here on Klaas Bil's site: 'The
rollout of a Coker wheel'
(http://www.xs4all.nl/~klaasbil/coker_rollout.htm)

I don't know the good computers are for a Coker. The models change and
I haven't kept up. The one I used to like is a one button Schwinn
computer that you could get at Wal*Mart for around $10. But that model
has been changed to a two button version and I don't know if the new
one is still good for a uni or not.

One problem some computers have is that some of them register a new
speed after only one revolution of the wheel. Other computers require
two or maybe three revolutions before they'll register a new speed.
Computers that update the speed and max speed after only one revolution
have problems with false readings when the magnet flips by the sensor
during a mount or an idle. They can give you false readings for max
speed that you know are way too high. That's one reason I liked that
Schwinn because it doesn't have a big problem with false readings. You
aren't going to know how a particular cycle computer behaves until you
actually try it. It's not something that you can find out in the
manual.

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john_childs

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I've lost 2 Cateye Enduro 8s in 4 rides from not clipping them in
properly... push them right in so it clicks twice!

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mikepenton
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The Schwinn 2 button works great. Available at Walmart.

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pdc

"What doesn't kill you strengthens you, what kills you strengthens your
mother"
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pdc said:

The Schwinn 2 button works great. Available at Walmart.

For about $10 😄

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Krashin'Kenny

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Would these bicycle computers work on a smaller unicycle? for example,
my 20" Nimbus?

Miek said:

Would these bicycle computers work on a smaller unicycle? for example,
my 20" Nimbus?

Yes it would.

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pdc

"What doesn't kill you strengthens you, what kills you strengthens your
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One other issue with selecting a cycle computer for a Coker is that the
stock Coker spokes are fat. Some of the sensor magnets that go on the
spoke won't fit the Coker spokes and others will require a little bit
of modification to get them to fit. The Schwinn computer that I use
required a little modification with a fingernail file emory board to
widen the slot that fits around the spoke. Was very easy to do and
only required a minimal amount of filing and the disposable emory board
was completely up to the task. It's something to look at to see how
well the sensor will fit on a larger diameter spoke.

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Another approach is an item like the Trainer from Timex.
http://www.timex.com/bin/detail.tmx?item=753048113774

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BigDawG
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