A folding exercise bike saves space and lets you work out on your terms. But you know the phrase, “out of sight, out of mind?” You may just have to work harder to make sure you regularly take out your exercise bike to get a sweat session in. That’s why details in a folding exercise bike matter. Ones that allow you to vary resistance and track performance can give you the motivation to work out regularly. Here, what to look for in folding exercise bikes.