Originally Posted by
lhbernhardt
Sigma computers are very reliable in the rain, but they changed their mount to a twist-on (from a slide-in) in 2003, and the computer is prone to untwisting itself, as it doesn't really lock securely.
My daughter had this problem with her Sigma. I put a very thin strip of tape around the circular part on the back of the computer that twists into the mount. It creates a firmer connection, and you can't see it. Hasn't fallen off again (yet). Granted she's only ridden a few hundred miles since I put the tape on. I imagine if you take your computer off a lot you might have to replace the tape often.