Before I got the Astrale, I once mounted a standard wired computer crosswise on the top tube near the seat tube of an old dedicated trainer bike. That let the shorter connecting wire reach the chainstay where I mounted the pick up and magnet. It was awkward to read while "riding" but it did record the "distance", time and "average speed." The Astrale mounts normally on the handlebars and I can use the same bike both on the trainer and on the roads.