What Is an Assault Bike? | Fan-Bike Training Explained

An Assault Bike is a fan-resistance stationary bike whose resistance rises as you push harder, delivering a full-body cardio workout without needing electricity.

If you’ve spent any time in a commercial gym, you’ve seen one—the bike with the large front fan and moving handlebars that feels brutal within thirty seconds. The defining trait: air resistance scales with your effort, so the harder you pedal and push, the tougher the ride gets.

How a Fan Bike Works

Unlike a spin bike with a weighted flywheel and magnetic or friction braking, an assault bike uses a paddle-wheel fan. When you pedal, the fan blades spin and push air, creating resistance. Push harder, spin faster, and resistance climbs—there are no preset levels or electric controls. This makes the workout self-scaling and intensely efficient.

The moving handlebars change the exercise fundamentally. Your arms and legs work together, driving your heart rate up far faster than lower-body cycling alone. This is why many athletes use it for sprints, EMOMs, and finishers. The air-blast from the fan keeps you cool in what is otherwise a brutal experience.

Which AssaultBike Models Exist?

All run on air resistance with no electricity required.

If you’re weighing which model fits your training space and budget, our roundup of the best assault bikes compares tested options side by side.

What’s Coming With the AssaultBike Elite?

The Elite is Assault Fitness’s flagship commercial-grade option, built with a heavy-duty enhanced commercial steel frame and industrial powder coating.

That means if you’re new to fan bikes, start easy—a few light minutes to learn the rhythm of coordinating arms and legs before you attempt all-out sprints.

Is an Assault Bike Right for You?

Fan bikes are low-impact but unrelenting. Your joints don’t take the pounding of running, but your cardiovascular system gets no mercy because resistance never plateaus—it only gets harder as you do. That makes them great for interval training, conditioning work, and warm-ups in a strength program.

The trade-offs are real. They’re loud—you’re moving a lot of air—and they take up meaningful space. You also cannot zone out on one; the moment you ease off, resistance drops and the workout loses intensity. If your goal is steady-state endurance or silent evening sessions, a different machine might fit better. If you want maximal conditioning in minimal time, the assault bike earns its reputation.