Matthew Nettle said:I think if I understood them, I might get one if it is the case that they no
longer click every time the wheel goes round. I hope one might help me come
to grips with metrication, so it'd be nice if it did temperature as well.
Do they count wheel revs, and if so, does one set them for different sizes or
simply whip out the pencil & envelope to convert to Brompton?
Yes, they still count wheel revolutions, but silently, so you'll be at
no disadvantage when playing bicycle tag. (Tag! You're it!)
A small and unobtrusive magnet is fixed to (usually) a front wheel
spoke. A sensor is then mounted to the inside of one fork blade and as
the wheel rotates the magnet triggers the sensor switch and a
revolution is counted by the main unit.
When initially installing and setting up the computer you enter the
wheel circumference, so the main unit knows how far you have traveled
for each rev.
Computers come in all kinds of different guises and with different
feature sets. Some are wireless, requiring no connecting wire between
the fork sensor and handlebar mounted main unit, others are wired.
Each have pro's and con's.
The basic features you might want are current speed, average speed,
trip counter, odemeter and max speed. I find it's important to get a
model that has auto stop and start, most do, but a few don't. Without
auto start I often forget to turn it on until x number of miles down
the road.
You can also get models which will display things like your pedaling
cadence, heart rate statistics, all manner of things. Prices start at
about a tenner up to 100 quid and more (crikey!).
Give us an idea of what you think you might want it to do, and we can
probably recommend a few models for you to consider.
"Bob"
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