Review · Fitness · 1 model
Sunny Health & Fitness Smart Folding X-Bike review: the 23.5 kg folding bike with a backrest, bands and an app
The one folding X-bike on our shortlist with a maker's page behind it: 14 magnetic levels, a padded seat with a mesh backrest, resistance bands clipped to the frame, Bluetooth to Sunny's app and a 135 kg rider limit, in a frame that weighs 23.5 kg. This review is about what the backrest and bands add, what 23.5 kg means for folding it every day, and what Sunny states and the listing supplies.
Verdict
What it is
the bike reviewed
Sunny Health & Fitness Smart Folding X-Bike
- Max user weight
- 135 kg
- Resistance
- 14 levels, magnetic
- Positions
- Upright and semi-recumbent with backrest; arm bands
- Footprint in use
- 97 × 56 × 134 cm
- Weight
- 23.5 kg
Check price on Amazon
A folding X-frame exercise bike with 14 levels of magnetic resistance, an adjustable padded seat with a breathable mesh backrest, integrated resistance bands, a console with Bluetooth to the SunnyFit app, foot straps, a pulse grip and transport wheels. Sunny’s page gives the features; the UK listing gives 135 kg maximum rider weight, 97 by 56 by 134 centimetres in use and 23.5 kg.
Strengths
- A maker's page and a UK presence behind it
- Backrest and bands for a seated session
- 14 levels, Bluetooth app
Limitations
- 23.5 kg is a lot to fold and wheel away
- Maximum user weight quoted differently in the UK and US
Good for
- a flat with somewhere to wheel it, and a rider who wants back support
Look elsewhere if
- anyone who needs to lift it into a cupboard
The backrest and the bands
The backrest turns a 20-minute upright pedal into a 45-minute seated one: you lean back, read or watch, and keep turning. The bands clip to the frame and give the arms and shoulders something to do while the legs work, which is what the 4-in-1 and 5-in-1 labels on these bikes mean. Neither is essential; both are why people keep using the bike in February.
Fourteen levels
Magnetic resistance in 14 steps from a light spin to a climb that makes you breathe hard. It is enough for fitness, as these bikes are; it is not a spin bike’s flywheel and a strong cyclist will find the top level light within a season. Sunny states the mechanism and the count on its page.
Weight and folding
The honest number: 23.5 kg. The frame folds and the wheels roll it to a wall, and that is how it will be stored, upright against a wall or in a corner. It is not a bike you lift into a wardrobe. The upside is the frame: at 23.5 kg it does not flex or creak near the 135 kg limit the way a 14 kg bike does.
The app
Bluetooth to SunnyFit for guided rides and a log. Useful for a month; the console does the job after. The pulse grips on the handlebars work without it.
Strengths
- A maker's page and a UK presence behind it
- Backrest and bands for a seated session
- 14 levels, Bluetooth app
Limitations
- 23.5 kg is a lot to fold and wheel away
- Maximum user weight quoted differently in the UK and US
Good for
- a flat with somewhere to wheel it, and a rider who wants back support
Look elsewhere if
- anyone who needs to lift it into a cupboard
Who should buy it
A flat with a corner the bike can keep, a rider who wants back support for longer sessions, a heavier rider who wants a frame that feels solid, anyone who wants a brand with a UK presence behind a folding bike.
Who should not
Anyone who must fold and lift the bike daily, for whom the Ultrasport F-Bike or the Evoland X-813 is half the weight; a cyclist who wants a heavy flywheel and a hard top level, who should buy a spin bike that does not fold.
Sources
Facts checked 23 October 2026
- Sunny Health & Fitness — Full Body Foldable Magnetic X-Bike Pro SF-B223012 product page — Manufacturer documentation, checked 23 October 2026
- Amazon listing (Sunny Health & Fitness) — Retailer listing, checked 23 October 2026
How heavy is 23.5 kg in practice?
Heavy for a folding bike: the Ultrasport F-Bike is 15.5 kg and the Evoland 14.3. It has transport wheels, so it rolls to a wall folded; it does not get lifted into a cupboard. If the bike will live in the corner of the room, the weight is a sign of a solid frame; if it must disappear daily, choose a lighter one.
What is the maximum rider weight?
135 kg on the UK listing and Currys' page; Sunny's US pages quote 300 lb, which is 136 kg, so the figures agree within rounding. We record 135 kg from the listing because Sunny's UK-facing page did not state it.
Is the app necessary?
No. The bike works with its LCD console alone. The SunnyFit app pairs over Bluetooth for guided sessions and logging; it is the kind of app people use for a month. The bands and the backrest are the features you keep using.
Magnetic or friction?
Magnetic, 14 levels, which is silent and does not wear. Sunny states it on the product page, which is more than most bikes at this price can say.
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