I'm in search of a basic wireless cycling computer (at least able to compute speed and distance) for my bike. The main problem is that most wireless computers I see have a little magnet and wireless piece that attach to your spoke and fork, respectively.

I am unable to do this since I have a carbon trispoke as my front wheel, so I'm wondering if there are any wireless computers out there that I can attach the wireless piece onto my chainstay or seatstay, and the magnet onto a spoke on my rear wheel.

I've been eying a basic Bell computer since it's cheap and gets the job done, but I'm not sure whether or not it'll work on the rear wheel.

Does anyone know any basic wireless computers that will work perfectly for my situation?