This post compares 7 of the best budget indoor bike trainers, ranging in price from well under $100, to around $700. These indoor trainers include Turbo, Fluid, Magnetic, Electronic and Air resistance trainers. We even feature an affordable smart trainer. An indoor bike trainer is a great way to build your cycling fitness when circumstances make it hard to go outside. Simply set up your regular bike on an indoor bike trainer and pedal away. In this post we also recommend a couple of essential accessories to make your indoor bike training experience more comfortable.