Best Fold Flat Treadmill UK: 4 Top Picks for 2026

Home treadmills are more popular than ever, and that rise in demand has pushed prices down and forced manufacturers to think about space. The result is the fold flat treadmill: a machine you can run on, then tuck under a bed, sofa or cupboard when you're done. Genuine fold-flat machines are rarer than the marketing suggests, so we've compared the ones currently available in the UK on folded height, speed, belt size and price. Here are our four picks, ranked.

1. Mobvoi Home Treadmill SE: Best Overall

Our top pick for the best fold flat treadmill in the UK is the Mobvoi Home Treadmill SE, and the reason is simple: it folds genuinely flat, and it still lets you run.

Features

The headline is the folded size. Mobvoi quote roughly 5 inches high, 16 inches wide and 40 inches long once folded, which is about as slim as a standing phone. That's flat enough to go under most beds and many sofas, or to stand upright in a corner, and built-in wheels get it there.

It's a true 3-in-1. With the handrails up it's a running machine doing 1 to 12 km/h. Fold them down and it switches to walking mode or workstation mode, both 1 to 6 km/h, so you can use it under a desk or in front of the TV to build up your step count. A 12 km/h top speed on a machine that stores under a bed is the trick most fold-flat rivals can't manage.

The 2.5 HP peak motor supports up to 120 kg and Mobvoi quote it at no more than 60 dB. The running area is 40 x 16 inches on a five-layer belt with a high-strength support layer and a shock absorption layer. An LED display cycles through speed, duration, distance and calories every five seconds, and a remote handles start, stop and speed, with shortcut buttons that jump straight to 3 km/h and 6 km/h.

The TicSports app adds AI coaching with daily plans and live metrics, and there's a virtual training mode that connects you to trails and online walking and jogging games if you need something to look at while you walk. If you want incline as well as a folding deck, Mobvoi make a larger model we've covered separately in our Mobvoi Home Treadmill Incline review.

Build quality

It arrives ready to go, which is the norm for this category and one of the reasons these machines have taken off. The five-layer belt and the 120 kg capacity are respectable for the money, and the sub-60 dB figure matters more than it sounds: a walking pad you can't run while someone else is watching TV is a walking pad you stop using.

Be realistic about the compromises. A 16-inch belt width is narrow next to a full-size treadmill, and the 120 kg limit and compact deck mean this suits walking and steady running rather than heavy training. Mobvoi is also a walking-pad specialist rather than a gym brand, so you're buying on spec and owner feedback, not on a long warranty.

Cost

The price is the other reason it tops our list. For well under £200 you get a machine that folds flat, runs to 12 km/h and doubles as an under-desk pad, which is a combination that used to cost a lot more. If you want a home treadmill that truly folds flat and stores away quickly after a run or a walk, this is the one to get.

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2. Reebok i-Run 5.0 Folding Treadmill: Best Premium

Our next pick is the Reebok i-Run 5.0. It's the big-brand option here, and it earns its place on quality and features rather than on folded height. Be clear on that up front: it folds to 31 cm, which is compact and easy to store against a wall, but it does not go under a bed.

Features

This treadmill is the most capable machine in this guide by a distance. A brushless 1.25 HP motor (2.0 HP peak) drives it to 15 km/h, and there are 12 levels of powered incline you can change at the touch of a button while you keep moving, which none of the other picks here offer. The cushioned running deck measures 46 x 120 cm.

There are 16 built-in programmes, and Bluetooth connects it to Zwift, Kinomap (with a 60-day trial included) and the Reebok Console App, so you can follow structured training or run virtual routes. The console uses a rotating dial and touch buttons, showing speed, time, distance, calories, incline and pulse. Heart rate comes from hand sensors or an optional Bluetooth Smart chest strap. A tablet holder and two bottle holders finish it off.

One of the best touches is that it arrives 100% built. No assembly, no instruction booklet to decipher, just unfold it and go. If you want a closer look at how this range performs, we reviewed the outgoing model in our Reebok i-Run 4.0 treadmill review.

Build quality

You're paying for the brand and the cushioning here, and the powered incline is the feature that justifies the step up: it's the difference between walking and hill training. Transport wheels move it once folded.

The honest limit is power. At 1.25 HP continuous this is pitched at walking, jogging and running rather than heavy daily mileage, and the 120 cm deck is short for taller runners at pace. It's also several times the price of the Mobvoi.

Cost

The i-Run 5.0 is the pick if you want the most polished, big-brand option and you have a wall to stand it against rather than a bed to slide it under. Just note that it doesn't fold flat, and it can be pricey for some budgets.

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3. THERUN 2-in-1 Walking Pad Treadmill: Best for Under-Desk Use

Our runner-up is the THERUN 2-in-1, and depending on your needs, it could be the right treadmill for you. It has one significant advantage over the Reebok: the handrails fold down flat, so you can use it as an under-desk walking treadmill.

The choice between the Reebok and the THERUN comes down to how you'll use it. If it's part of a dedicated workout routine with time set aside, the Reebok is the better fit. If you struggle to find time or you're tight on space, the THERUN could be the winner.

Features

Lower the handrails and it's a compact pad that fits under a standing desk. Raise them and it's a steadier jogging machine. The 2.5 HP motor covers 1 to 10 km/h, from a gentle walk up to a brisk 6.2 mph jog, and a magnetic remote adjusts speed without breaking stride.

The running belt is 95 x 40 cm with a non-slip textured surface, and a safety magnetic key gives you an instant emergency stop. The LED panel tracks speed, time, distance and calories in real time, with no app or Bluetooth pairing to set up, which is either a plus or a minus depending on how you feel about apps.

The biggest feature is the storage: it folds to just 11.5 cm thin, with built-in transport wheels, so it slides under a sofa, bed or desk. That's a huge plus for anyone short on space.

Build quality

It's fully assembled out of the box, so you unfold it and start walking. THERUN flag one thing worth repeating: make sure the safety lock is correctly installed before you switch to handrail mode and use it as a jogging machine. That's the sort of instruction people skim, and it matters on a machine with folding rails.

The trade-offs are the usual compact-pad ones. A 95 cm belt is short, so it suits walking and light jogging rather than a proper run, and there's no incline. THERUN is a value brand, so check the seller's support before you commit.

Cost

At around £120 at the time of writing, this is a well-priced fold flat treadmill with a genuinely useful dual mode. The folding handrails let you hide it away under the bed or walk at your desk while you work. If your priorities are space-saving and exercising at the computer, this is the treadmill for you.

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4. Mobvoi Walking Pad Under Desk Treadmill: Best Budget

If you want to spend as little as possible but still get a machine that genuinely stores away, the Mobvoi walking pad is our budget pick. Budget usually means a drop in quality and features, but this one does a genuinely good job on both.

Features

It's not as powerful as the others, and its 6 km/h top speed is for walking only, but that's the point at this price. It doesn't so much fold flat as start flat: at 10.8 cm high and 110.5 cm long it's the slimmest machine here, and Mobvoi note you can leave it on the sofa or a coffee table, slide it under the bed, or stand it upright in a corner.

The LED display covers calories, speed, time and distance, and the remote handles start, stop and speed. There are built-in speakers for music, and the TicSports app adds AI coaching with daily plans and live metrics. It also connects to Zwift and Kinomap, plus Mobvoi's virtual training trails and games, which is unusual at this price.

Build quality

At a net weight of 13.4 kg it's by far the lightest pick here, and one person can move and store it without help. The 1.65 HP peak motor supports up to 120 kg and Mobvoi quote it at no more than 60 dB. Underneath is a five-layer anti-slip belt with a high-strength support layer and a shock absorption layer to take some load off your knees and ankles.

The compromises are the honest ones for a sub-£100 pad. There are no handrails, so there's nothing to hold, and 6 km/h means walking only. The light 13.4 kg frame that makes it easy to carry is the same frame that gives it less planted feel than a heavier machine.

Cost

At just over £90 at the time of writing, it's hard to beat. Its balance of cost, weight and features is excellent, making it our go-to if you want to spend as little as possible while still getting a machine that disappears when you're done with it.

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Which fold flat treadmill should you buy?

We compared the fold flat treadmills currently in stock in the UK for this guide, and these four were chosen for their folded size, features and reasonable price. Here's the quick summary:

• Best overall: the Mobvoi Home Treadmill SE folds to roughly 5 inches, runs to 12 km/h and doubles as an under-desk pad. It's the best balance of storage, speed and price here.
• Best premium: the Reebok i-Run 5.0 is the best big-brand option, with 12 levels of powered incline, app support and no assembly. Just note it folds to 31 cm rather than flat, and it can be expensive.
• Best for under-desk use: the THERUN 2-in-1 folds to 11.5 cm and drops its handrails, so it's ideal if you want to walk while working at a desk, or slide the machine under the bed when not in use.
• Best budget: the Mobvoi walking pad is only 10.8 cm high and 13.4 kg, and does the fundamentals well at an affordable price, even if it's walking-only.

If you want one machine that both runs and stores away, the Mobvoi Home Treadmill SE is the safe choice. If you mainly want steps while you work, the THERUN or the cheaper Mobvoi pad will do it for less.

Recommended reads

• All treadmills
• Best Walking Pad UK
• Best Treadmill Under £500
• Best Budget Treadmill UK
• Viavito LunaRun Fold Flat Treadmill Review