This video contains product placement on behalf of Zwift. These are the ten best smart trainers as rated by our team of expert testers, here at BikeRadar. A smart trainer, or sometimes called a turbo trainer, is a training tool that offers variable resistance like a normal indoor trainer, but with the added benefit of allowing the resistance and other parameters to be controlled by cycling apps such as Zwift. For example, when riding a virtual course on a smart trainer, if you begin to climb a h