I became real accustom to using cadence with my DF.  Now that I am on the F5, I am quickly learning cadence would be nice here as well.  Unfortunately my wired Cateye computer on the DF will not work with the F5.  Any recommendations.  I am happy using the 'droid with MMR for workout details.
 
I recently looked at a Specialize Sport - Cadence.  It is wireless for speed and wired for cadence at about $60 at Bicycle Inc.  I just do not longevity with Specialized electronics.  The Cateye is over 10 yr and still work well.
Also checked on the Sigma ROX 5.0 wireless for both but also has HR.  Under $100 on Amazon.
 
Thanks for any assistance.
 
Mike

I looked at my lbs, and couldn't find a double wireless, so I got a wired one and modified it. The newer ones in a one piece plastic housing are no good for this, but if you get one of the ones where there is a short wire connecting the speed and cadence sensors, those can be modified. The cadence sensor is nothing but a pulse counter, and so it doesn't care how long the wire is connecting the two. I got the smallest wire I could find, which was 28 ga speaker wire. Cut the wire to the cadence sensor and soldered in the speaker wire to give me the length I needed between the two. Not very elegant, but it worked!