I prefer to use Tunturi or Vitamaster exercise bikes for conversion. They are well built with a heavy flywheel and good bearings. The frame is solid, but the handlebars may wobble a bit on some models
Start prepping you exercise bike for conversion by removing unnecessary equipment. Most exercise bikes have either brake pads or a web strap that rides on the perimeter of the flywheel. This one has a watt meter hooked to the drag brakes.
On this model, you'll also need to remove the rubber banding from the perimeter of the flywheel.