Joined: Dec 2004
Posts: 12,556
Likes: 799
From: Middle of da Mitten
Bikes: Trek 7500, RANS V-Rex, Optima Baron, Velokraft NoCom, M-5 Carbon Highracer, Catrike Speed
Janmm's got it. The computer you're using is just inadequate for the job. It's too far to shoot a standard signal through the rider's body. The digital ones should do better. Or get a wired computer for the rear wheel pickup.