Concept2 BikeErg Review: The Data-Driven Air Bike

The Concept2 BikeErg is the stationary bike from the company that has quietly dominated indoor rowing for decades. It uses the same air resistance and the same PM5 performance monitor as the legendary Concept2 rower, repackaged around a bike frame. That heritage tells you exactly what this machine is about: accurate, repeatable data and near-bulletproof reliability, rather than streamed classes and a glossy touchscreen. It is aimed at cyclists who want honest numbers off-season, CrossFit and HIIT trainers, and anyone who has grown tired of consumer bikes that break or lock their features behind a subscription. The headline verdict is that the BikeErg is superb at what it sets out to do, as long as you understand it is a data tool first and an entertainment device not at all.

What you are paying for is the resistance system and the monitor. The flywheel is spun through the air, so the harder you pedal the more resistance you feel, with no motor, no cables and almost nothing to wear out or service. The PM5 monitor then measures your effort precisely and consistently, which is the real magic: a given power output feels and reads the same today as it will in a year, and the same as on any other BikeErg in the world. The catch is that all of this comes with a spartan, no-frills experience and a price that sits in premium territory.

Who it is for

The BikeErg makes most sense for people who care about the numbers. Cyclists wanting reliable indoor power for winter training, CrossFit athletes who need a bike that matches competition standards, and interval and HIIT fans who want instant, honest resistance all get exactly what they need. It is also a brilliant low-impact cardio option for anyone who wants to protect their joints, since air resistance is smooth and there is no jarring. If you want streamed instructor classes on a built-in screen, though, this is the wrong machine, and one of the smart exercise bikes will suit you far better.

Build and feel

This is where Concept2's pedigree shows. The frame is powder-coated steel and feels rock solid under hard efforts, with none of the flex or rattle you get on cheaper consumer bikes. It is genuinely well thought out for a home: at around 31kg it is light for a machine this sturdy, it rolls on transport wheels, and it separates into two parts for storage or moving between rooms. Assembly is straightforward and quick, a welcome change from the fiddly builds of many bikes.

The riding position is fully adjustable, with the seat moving up, down, forwards and back, and the handlebars adjusting too, so a wide range of body sizes can find a proper fit. The one common gripe is the saddle. Like most performance bikes it ships with a firm, narrow seat that suits committed riders but which plenty of owners choose to swap for a more padded aftermarket option or a gel cover. It uses a standard fitting, so replacing it is easy.

Performance and the PM5 monitor

On the bike, the air resistance is the star. Because the flywheel is spun through the air, resistance scales seamlessly with your effort: ease off and it drops, stamp on the pedals and it climbs instantly with no lag. That responsiveness is what makes it so good for intervals. Sprints spike immediately and recoveries feel genuinely easy, which is exactly what you want for structured training. Research on sprint interval training performed on air bikes has found it delivers meaningful cardiorespiratory improvements in a time-efficient way (sprint interval training on a stationary air bike study). A spiral damper lets you tune how the airflow feels, much like the lever on a Concept2 rower.

The PM5 monitor is the other half of the appeal. It shows power in watts, cadence, distance, pace, calories and heart rate, stores your workouts, and lets you program intervals and set targets, all without a subscription. Crucially, its numbers are consistent and comparable, so you can trust that a 200 watt effort today is the same as a 200 watt effort next month. It connects over Bluetooth and ANT+ to apps like Zwift for a more visual, gamified ride, and to heart rate straps. The screen is a functional backlit LCD rather than a colour touchscreen, which fits the machine's honest, tool-like character. Concept2 details the full monitor feature set on its official BikeErg page.

Noise, low impact and value

For an air bike, the BikeErg is impressively quiet. Only the compact flywheel moves air, rather than the large fan arms of a full air bike, and the belt-to-chain drive is smooth, so day-to-day riding produces a modest whoosh that rises under hard efforts but stays reasonable. It is fine for a flat, a shared house or an early-morning session without waking anyone, though it is not silent when you are sprinting flat out.

As low-impact cardio it is excellent, with a smooth pedal stroke and no jarring, which makes it kind to knees, hips and backs. Regular cardio of this kind supports the weekly activity the NHS recommends for heart and general health (NHS physical activity guidelines).

On value, the BikeErg is a considered purchase rather than a bargain. At its price you could buy a smart bike with a big screen and streamed classes, and if that experience is what motivates you, that is the better spend. What the BikeErg gives you instead is accuracy, reliability, no ongoing subscription and a machine that will very likely still be running perfectly in a decade. For data-driven riders and anyone who hates the idea of paywalled features, that trade is well worth it. To see how it compares with other options, browse our exercise bike reviews, and for a lower-cost gym-style alternative see our best spin bike UK guide.