mykiscool:
My intention was to measure the speed of a bike wheel as it turns in revolutions per second or minute and then calculate that to the actual speed using the wheel size. Also I tried using a debounce to make sure I wasn't getting the magnetic reed giving me 2 readings and I still have the same thing not the right reading. Any suggestions?
Just be aware that "wheel size" depends on tire pressure, tire width and load on the wheel as well as the nominal diameter. At 75 psi it will be less than at 90 or 110.
IMO you should make a small solid wheel that the bicycle wheel turns and find the rpms of that.