[Hamza951]

Just ordered on of these:
http://dx.com/p/1-7-lcd-electronic-bicycle-speedometer-1xcr2032-101787

It is only $13.10 and is free shipping anywhere.
I will let you know the outcome, going to fit it on my x7

 

[EPR]

You have to mount a magnet on your rim and line it up with a sensor on your forks, lets us know how it works out.