Best exercise bikes UK

Why are “resistance levels” almost meaningless?

Because there is no shared standard behind the number, and because three completely different mechanisms all get described with the same word.

Friction resistance presses a felt or leather pad onto the flywheel. It is cheap, gives a lot of resistance, and wears out — the pad is a consumable you will eventually replace. Magnetic resistance moves magnets closer to or further from the flywheel without touching it: quieter, effectively maintenance-free, and the reason a good magnetic bike is the sensible flat-dweller's choice. Electromagnetic resistance does the same thing under electronic control, allowing programmes to change resistance for you, and needs mains power.

So “32 levels” on a friction bike and “8 levels” on a magnetic bike are not comparable quantities. They are not even measured the same way. Ask what the mechanism is first; treat the level count as packaging.

What does flywheel weight actually do?

It changes how the pedal stroke feels, not how hard the ride is — and those get conflated constantly in marketing copy.

A heavier flywheel stores more momentum, so it carries you through the dead spots at the top and bottom of the pedal stroke. That reads as “smooth” and is closer to riding a real bike. A very light flywheel can feel jerky, particularly at low cadence.

What a heavy flywheel does not do is make the ride harder. That is the resistance mechanism's job. JTX's own buying guide states it plainly: flywheel weight “affects ride smoothness, not maximum resistance”.

The spread across the bikes on this page makes the trade-off concrete:

• 1.6 kg — Argos Opti folding, £99. Light, foldable, easy to move; least stable feel out of the saddle.
• 3.5 kg — JTX Racer-M, £599. Deliberately light; JTX pitches this as a durability and low-maintenance choice rather than a smoothness one.
• 6 kg — Roger Black Gold, £199.
• 18 kg — Decathlon Training Bike 500, £499.99. The closest to a road-bike feel here — and correspondingly heavy and non-folding.

Note that the two heaviest flywheels are not on the two most expensive bikes. Flywheel weight tracks bike type far more than price.

The subscription trap

A screen-equipped bike is not really a bike purchase — it is a subscription with hardware attached, and it needs pricing that way.

Current UK membership prices, checked 9 August 2026: Peloton All-Access is £45/month and Echelon Premier is £29.99/month (falling to an effective £19.99 on a two-year commitment).

Run that over three years and the picture changes completely. A Peloton Cross Training Bike at £1,599 plus £45/month is roughly £3,219 over three years. The JTX Racer-M is £599, total. That is not a like-for-like comparison — Peloton's classes are the product, and for some people they are genuinely the thing that sustains the habit — but the sticker price is not the price.

There is a sharper version of this problem with Echelon. Reviewing one of its connect bikes, Coach UK found that you need to be connected to the Echelon app for the resistance to work, calling it a closed system. If that holds, the subscription is not buying you classes on top of a working bike — it is part of what makes the bike work. We could not establish whether the free app tier is enough for basic resistance, so treat it as a question to ask before buying rather than a settled fact.

Every non-connected bike on this page — JTX, Decathlon, Roger Black, Argos Opti — works fully with no subscription at all.

Check before buying: exactly what stops working without the subscription, whether the membership covers your household or one person, and what happens to the machine if the company stops trading.

What actually matters when you choose

1. Warranty terms, especially labour. These machines are too heavy to post back. An in-home warranty covering parts and labour is worth real money; a parts-only warranty means you arrange and pay for the engineer.
2. Maximum user weight. Budget and folding bikes often stop around 100–120 kg. Buying close to the limit tends to mean flex and noise.
3. Saddle comfort and adjustability. The single most common complaint about home bikes. Check the saddle uses a standard fitting so you can replace it — often a £30 fix for a bike you otherwise like.
4. Whether it folds, honestly. A folding bike still needs somewhere to go. Measure the folded footprint against the actual cupboard.
5. Noise, if you share walls or floors. Magnetic beats friction; both beat a treadmill or an air bike comfortably.

Questions people ask