DeerRun X20 Review 2026: 15% Auto Incline and First Impressions

DeerRun Review

The DeerRun X20 sits below the flagship X50 in DeerRun’s range, but it is arguably the best-value running treadmill in the UK: a genuine 15% auto incline, an 11.2 mph top speed, a 181 kg capacity and a flat fold to just 7 inches thin, all for £499 with no subscription. We bought one in and put it through its paces, so these first impressions come with our own photos throughout, alongside our full assessment.

Set up and ready to go

First impressions

A few things stood out straight away. For a folding machine the X20 feels well built and planted, noticeably more premium than the price suggests. The emergency stop cord and clip are a clear cut above the flimsy tethers you often get on budget machines, and the belt stops fast when the clip is pulled. The incline is the real surprise: the gradient is significant, the mechanism is smooth through its range, and even at the full 15% on a hard floor there is no wobble or loss of stability.

There are a few niggles, none of them dealbreakers so far. The free PitPat app does the job but could feel more refined. The upright arms have no quick release, so folding or adjusting them means loosening and tightening with the supplied Allen key. That is only about 30 seconds each way, but it is manual, and you need to keep the key to hand. And to fold the deck fully flat you have to take the tablet holder off first. There is also no drinks holder, which is a small but genuine annoyance when you want a water bottle to hand on a longer session. We will report on how all of this holds up in the full review to come.

The 15% auto incline is the headline

Most treadmills under £1,000 offer 10 to 12% incline, and many at that price are manual: you stop the belt, bend down and adjust the legs. The X20 does 15% automatically, controlled from the touchscreen or the PitPat app. You press a button and the deck tilts. No stopping, no bending, no Allen keys.

For context, most treadmills stop at 10 to 12% incline, and a true 15% powered gradient is usually reserved for pricier, higher-end machines. Getting commercial-level incline at this price is genuinely unusual.

Walking at 4 mph on a 12% incline has most people breathing harder than jogging on the flat. At 15% it becomes a serious cardiovascular challenge. If you do incline walking for fat burn, the increasingly popular 12-3-30 style sessions, the X20 gives you more room to progress than almost anything at its price. Raising it to the full 15% during setup, the deck stayed planted on a hard floor with no wobble at the top of the range.

The running belt: an honest look

The belt measures 130 by 45 cm. That is a respectable length for a folding treadmill at this price, and it is the width rather than the length that is a touch tight. For walking and jogging it is fine. For running at pace, if you are over 5 ft 10, the 45 cm width starts to feel tight; your feet do not have the margin a wider 51 cm or 55 cm deck provides.

For the average UK buyer, walking, jogging and the occasional run, under 5 ft 10, the 130 by 45 cm belt is perfectly adequate. For taller runners who train at speed regularly, the belt size is the main reason to consider spending more on a larger-decked machine such as the JTX Sprint 7 (152 by 51 cm) instead.

Speed and motor

The 11.2 mph (18 km/h) top speed covers everything from a gentle walk to a fast run. DeerRun does not publish CHP motor ratings the way the big brands do, so direct motor comparisons are impossible. What reviewers consistently report, and what we found on setup, is that the motor handles speed transitions smoothly and runs quietly at walking and jogging speeds. At higher running speeds the noise increases but stays manageable for home use.

The brushless motor is a positive sign. Brushless motors are more efficient, run cooler, produce less noise and last longer than brushed alternatives. Brushless motors are usually reserved for premium and commercial machines, so DeerRun fitting one at this price is noteworthy.

Folding: genuinely impressive

The X20 folds to just 7.3 inches (18.6 cm) thin, thinner than most sofa cushions. You can slide it under a bed, behind a sofa or into a wardrobe, or stand it upright against a wall. Built-in wheels make repositioning easy, and a soft-drop mechanism stops the deck slamming down when you unfold it. One practical note from setting it up: to fold the deck completely flat you need to remove the tablet holder first.

This is dramatically more compact than a traditional upright fold-up treadmill, which still leaves a substantial footprint against the wall when folded. If storage space is a genuine constraint, the X20’s flat fold is one of the best solutions on the market.

Inverse walking mode

The X20 includes a backward walking mode at low speeds on an incline. Walking backwards on a gradient engages different muscle groups, particularly the quads and calves, and reduces knee joint stress compared with forward walking. It is used in physiotherapy and rehabilitation.

Whether you will actually use it is another question, and most buyers will not. But if you have knee issues or you are interested in varied training, it is a feature you will not find on most treadmills at any price.

PitPat app: free, but basic

PitPat is DeerRun’s free fitness app. It connects over Bluetooth for workout tracking, gamification, virtual races and leaderboards. It is free, which immediately sets it apart from subscription platforms like iFIT (£15 to £39 a month) and Peloton (£12.99 a month). Over three years of ownership, that is £540 to £1,400 saved against a treadmill that locks its content behind a monthly fee.

The flip side is that PitPat is not as polished or content-rich as iFIT. The interface feels mobile-first, the virtual worlds are less immersive, and the connection can be inconsistent. If you are the type who just wants to press start and run, PitPat’s limitations will not bother you because you will rarely open it. If guided content and production quality matter, iFIT or Zwift are the stronger platforms.

The warranty question

DeerRun’s warranty tops out at 2 years. The established big-brand treadmills come with far longer cover: the JTX Sprint 7, for example, has a 3-year in-home repair and 10-year parts warranty, and several rivals back the frame for life. At the X20’s price the shorter warranty is more acceptable because you are risking less money. But if you plan to use the treadmill daily for five years or more, the established brands offer more peace of mind.

The 60-day return policy partly offsets this. You get two months to test the machine properly, which is long enough to surface any issues. Use it.

How it compares

The X20 wins on incline (15% against 10%), maximum user weight (181 kg against around 120 kg) and price. The JTX RunRise XL counters with a bigger deck, a faster top speed and a longer warranty from an established British brand. Both are strong flat-fold options: choose the X20 for the steeper incline and higher capacity, or the RunRise XL for a larger running surface and longer cover.

Full specifications

Frequently asked questions

Is the DeerRun X20 good for running?

Yes. The 11.2 mph top speed and 130 by 45 cm belt handle proper running, not just jogging. The belt is narrower than the 51 to 55 cm decks on pricier rivals, so runners over 5 ft 10 may find the width tight at higher speeds. For most home runners, the X20 is a capable running treadmill.

Is the DeerRun X20 worth it?

For the price, yes. A genuine 15% auto incline, an 11.2 mph top speed, a 181 kg capacity and a flat fold to 7 inches thin at £499 is a lot of treadmill for the money, with no subscription to run it. The trade-offs are a narrower belt, a shorter warranty and a younger brand still proving itself, but the 60-day returns let you test it risk-free. If you want a serious running treadmill on a budget, it is one of the best-value options in the UK.

How compact is the X20 when folded?

The X20 folds to just 7.3 inches (18.6 cm) thin. It slides under beds, behind sofas or into wardrobes. Built-in transport wheels make repositioning easy, and a soft-drop mechanism stops the deck slamming down when you unfold it. To fold the deck completely flat, you first remove the tablet holder.

Does the DeerRun X20 need a subscription?

No. The PitPat app is free, and the X20 also works perfectly in standalone mode without it. Unlike subscription treadmills that run iFIT (£15 to £39 a month) or Peloton (£12.99 a month), there are no ongoing subscription costs.

What is the DeerRun X20 warranty?

Up to 2 years covering manufacturing defects. This is shorter than the cover from established brands like JTX (3-year in-home repair and 10-year parts), some of which back the frame for life. DeerRun offers a 60-day return policy, which gives you two months to test the machine properly.

What does inverse walking mode do?

Inverse walking mode lets you walk backwards on the belt at low speeds on an incline. It engages different muscle groups (quads and calves) and reduces knee joint stress compared with forward walking. It is used in physiotherapy and rehabilitation. Most buyers will not use it regularly, but it is a feature you will not find on most treadmills at any price.