Last winter I mounted a $9.99 Target bike computer on the rear wheel of my trainer-bike. I cut the wire between the pickup and the computer, spliced in a 4 foot section and installed the 'puter on the bars. The hardest part was getting the correct spacing from the chainstay to the spoke-mounted magnet. I put a section of hose over the chainstay and zip-tied my pickup to that. Super easy to do and everything worked just great first time.