JLL Fitness occupies a specific and useful corner of the UK treadmill market. They are by no means a bells and whistles brand. You won’t not find fancy infotainment systems and touchscreen consoles here. But JLL aren’t a no-name Amazon brand either, they’re an established and growing British-brand with some serious treadmill offerings for budget conscious runners.
And, they have a Birmingham-based physical showroom, a UK support team, and a track record going back to 2012 of selling affordable home treadmills that hold up to the competition.
The brand built its reputation on machines like the S300 and T350 — solid, mid-priced folding treadmills with proper motors, electronic incline, and cushioned decks. Those models accumulated thousands of Amazon reviews and became some of the most recommended treadmills in the under-£600 bracket. If someone told you to look at JLL, that is almost certainly what they were talking about.
The current JLL range, however, has shifted direction. The website now sells just four core models, two JLL-branded and two under the Sunny Health & Fitness name, which JLL distributes in the UK.
All four are compact, brushless-motor machines designed for walking, light jogging, and small spaces. The fastest tops out at 9 mph. None have the full-size running decks or 20-level powered incline of the legacy range, but they’re solid choices for those with compact requirements.
This page covers everything: the four current models with honest specs and recommendations, plus the legacy range that is still occasionally available on Amazon as of early 2026 (although, they’re getting harder and harder to find new).
If you already know your budget, the comparison table below will get you to the right section fast. One quick note, all of JLL’s current treadmill range are available to buy direct and they’re one of the few suppliers to accept Klarna, letting you spread payments easily – great for those budgeting their treadmill purchase.
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Quick Comparison: Every JLL Treadmill in the UK
| Model | Best For | Max Speed | Incline | Price |
|---|---|---|---|---|
| JLL Helius Lite Treadpad | Under-desk walking | 7.5 mph | None | £399.99 |
| Sunny Slim Interactive | Walking & light jogging | 8 mph | None | £499.99 |
| JLL Pegasus Connected | Compact spaces | 7.5 mph | 3-level manual | £499.99 |
| Sunny Slim Auto Incline | Best current all-rounder | 9 mph | 12-level powered | £599.99 |
About JLL Fitness
JLL Fitness is a Birmingham-based company founded in 2012 that designs and sells home fitness equipment across the UK. They operate a showroom at their Birmingham headquarters and run UK-based customer service — a genuine advantage over the flood of no-name Amazon brands that disappear the moment something goes wrong.
What most buyers do not realise is that JLL is also the official UK distributor for Sunny Health & Fitness, a Los Angeles-based fitness equipment company with over 20 years in the business. This means the current jllfitness.co.uk storefront sells a mix of JLL-branded and Sunny-branded treadmills, all connected through the same SunnyFit app ecosystem.
Two of the four current models carry the Sunny Health & Fitness name rather than JLL — which can be confusing if you land on the JLL website expecting to see only JLL products.
The practical impact for you as a buyer is minimal. Whether the badge says JLL or Sunny, the purchase, delivery, and after-sales support all run through JLL’s UK operation. Same customer service team, same returns process, same warranty handling.
JLL made their name with the S300 and T350 series. Affordable folding treadmills with proper motors, electronic incline, and build quality that held up. Those models are still widely available on Amazon with thousands of reviews, though they are no longer featured on JLL’s own website. The current range has pivoted towards brushless-motor walking pads and compact treadmills — quieter, slimmer machines aimed at home offices and small living spaces rather than dedicated home gyms.
JLL Helius Lite Smart 2-in-1 Treadpad — £399.99
Speed: 0.6–7.5 mph | Motor: Brushless | Deck: 119 × 42 cm | Incline: None | Folds flat: Yes | App: SunnyFit
The Helius Lite is JLL’s entry into the walking pad market. A slim, dual-mode treadmill designed to slide under a desk for walking meetings or fold flat for storage when you are done. In walking mode (under ~2.5 mph), the handrail stays folded down and you control speed with a remote. Flip the handlebar up, clip in the safety key, and it switches to running mode with speeds up to 7.5 mph.
At 7.5 mph top speed, this is fundamentally a walking and light jogging machine (you can use our treadmill speed calculator to see what pace you’ll break a sweat at). The brushless motor is whisper-quiet, noticeably quieter than the belt-driven motors in JLL’s legacy range — which is the entire point if you are using it during work calls or in a shared living space.
The 119 × 42 cm deck is standard for the walking pad category. Comfortable for walking and brisk walking, adequate for light jogging if you are under 5 ft 8 or so. Anyone taller who wants to actually run will feel restricted. The flat-fold design is the real selling point: it stores at around 15 cm thick, which means it genuinely fits under a bed, sofa, or behind a door.
SunnyFit app connectivity via Bluetooth adds guided walks, progress tracking, and community features. None of it is mandatory, and the JLL Helius works perfectly with the remote control alone.
Best for: Remote workers who want to walk during the day without leaving their desk. Anyone who needs a treadmill that disappears when not in use. Not a running machine — do not buy this expecting to train for a 5K.
Sunny Health & Fitness Slim Interactive Treadmill — £499.99
Speed: 0.6–8 mph | Motor: Brushless (1.25 HP peak) | Deck: 120 × 42 cm | Incline: None | Max User Weight: 100 kg | Programs: 15 + 3 custom | App: SunnyFit
This is the Sunny-branded version of JLL’s compact treadmill offering — and the key difference from the Helius Lite is the upright console. Where the Helius is a flat walking pad that happens to jog, this is a proper treadmill with a fixed display showing speed, time, distance, calories, and heart rate via grip pulse sensors. It just happens to be very slim.
Top speed is 8 mph — half a mile per hour more than the Helius. Not a meaningful difference for walkers, but it gives joggers slightly more headroom. The brushless motor stays quiet throughout the range. 15 preset programs and 3 customisable profiles add structure to your sessions, which is more workout variety than the Helius offers.
The 120 × 42 cm deck is marginally longer than the Helius (119 cm), with the same 42 cm width. At 100 kg max user weight, it is the lightest-rated machine in the current JLL range. Heavier users should look at the Pegasus (120 kg) or the Sunny Auto Incline (120 kg).
The fixed low-profile deck folds upright for storage but does not fold flat like the Helius. You gain a proper console and more programs; you lose the under-desk capability. It is a trade-off that depends entirely on how you plan to use the machine.
Best for: Walkers and light joggers who want a structured console experience with preset programs, but still need a compact machine for a small flat or spare room. The step up from the Helius if you do not need under-desk use.
JLL Pegasus Connected Folding Treadmill — £499.99
Speed: 0.6–7.5 mph | Motor: 1.25 HP continuous (2.5 HP peak) | Deck: 51 cm wide | Incline: 3-level manual | Max User Weight: 120 kg | App: SunnyFit
The Pegasus is the only current JLL-branded treadmill with incline — albeit manual rather than powered. Three positions give you a flat deck, a gentle gradient, and a moderate hill. You need to stop and adjust by hand, which rules out interval-style incline changes mid-session, but it does mean you can permanently set the deck to a slight gradient for more challenging walks without touching a button.
Where the Pegasus stands out is deck width. At 51 cm, it is meaningfully wider than the Helius and Sunny Slim (both 42 cm) and wider than the Sunny Auto Incline (44 cm). Extra lateral room reduces the feeling of walking on a tightrope that plagues narrower walking pads. For a compact treadmill, this is a generous running surface.
Top speed is the same 7.5 mph as the Helius, which keeps this firmly in walking and light jogging territory. The DC motor (not brushless) is rated at 1.25 HP continuous — adequate for the speed range but not as whisper-quiet as the brushless units in the other three models. Still quieter than the legacy JLL range by a comfortable margin.
The deck folds horizontally to a 15 cm profile with front transport wheels. The touch-sensitive console, four quick-speed keys, and handrail controls make pace changes simple. A USB charging port and phone holder round out the convenience features.
At 120 kg max user weight, the Pegasus matches the Sunny Auto Incline and significantly outperforms the Sunny Slim’s 100 kg limit. If you are a heavier user choosing between the two £499.99 options, the Pegasus is the safer bet.
Best for: Users who prioritise deck width and want basic incline capability in a compact package. The widest current JLL treadmill despite being one of the most compact. Good choice for heavier walkers up to 120 kg who need more room than a narrow walking pad provides.
Sunny Health & Fitness Slim Interactive Auto Incline Treadmill — £599.99
Speed: 0.6–9 mph | Motor: Brushless (2.0 HP peak) | Deck: 120 × 44 cm | Incline: 12-level powered | Max User Weight: 120 kg | App: SunnyFit
This is the most capable treadmill in JLL’s current lineup, and the only one with powered incline. Twelve electronically controlled incline levels change at the touch of a button mid-stride — no stopping, no manual adjustments. That single feature separates it from everything else in the range and makes it the only current JLL model suitable for structured incline training, 12-3-30 workouts, or serious calorie-burning sessions.
Top speed hits 9 mph, the fastest in the current range by a full mile per hour over the Pegasus and Helius. Still not fast enough for sprint training, but comfortably covers brisk running and intervals for the majority of home users. The 2.0 HP peak brushless motor is the most powerful in the lineup and handles the incline demands without straining.
The 120 × 44 cm deck is 2 cm wider than the Helius and Sunny Slim, though 7 cm narrower than the Pegasus. At 120 kg max user weight, it matches the Pegasus for capacity. Build quality is a step above the other models — the soft-drop folding system prevents the deck from slamming when unfolded, and the overall feel is more substantial than the lighter walking pads below it.
If you are choosing between this and the Pegasus at £100 less, the decision comes down to powered incline versus deck width. The Sunny Auto Incline gives you 12 levels of electronic incline and a faster top speed. The Pegasus gives you a wider running surface and basic manual incline. For most users who plan to do more than walk, the powered incline is the more useful feature.
Best for: The best all-round treadmill in JLL’s current range. The only option if you want powered incline, and the fastest model available. Suitable for walking, jogging, incline training, and moderate-pace running. The one to buy if you can only buy one.
JLL Legacy Models — Still Occasionally Available on Amazon UK
Before the pivot to brushless walking pads and Sunny-branded machines, JLL built their reputation on a range of traditional folding treadmills — the S-series and T-series. These are no longer listed on jllfitness.co.uk, but they remain widely available on Amazon UK with active stock, thousands of reviews, and Prime delivery.
These legacy models are fundamentally different machines to the current range. They are bigger, heavier, faster, and built for running rather than walking. If you want a JLL treadmill that can actually reach running speeds with powered incline and a full-size deck, the legacy range is where to look.
The trade-off: parts and long-term support may become harder to source as JLL shifts focus to the current product line. Buying through Amazon provides 30-day returns protection, but warranty service on a discontinued model is always a question mark. Factor that into your decision.
| Model | Motor | Max Speed | Incline | Deck | Capacity | Amazon Price |
|---|---|---|---|---|---|---|
| S300 | 4.5 HP peak | 10 mph | 20-level powered | 132 × 41 cm | 120 kg | ~£590 |
| T350 | 4.5 HP peak | 11.2 mph | 20-level powered | 121 × 41 cm | 120 kg | ~£550–£600 |
| T450 | 4.5 HP peak | 11.2 mph | 20-level powered | 127 × 42 cm | 120 kg | ~£600 |
| S400 | 4.5 HP peak | 10 mph | 20-level powered | 135 × 45 cm | 120 kg | ~£650 |
| T550 | 4.5 HP peak | 12.4 mph | 15% powered | 156 × 51 cm | 120 kg | ~£700 |
The S300 and T350 are the bestsellers, with the S300 being JLL’s most-sold treadmill ever. Both offer 20 levels of electronic incline, Bluetooth speakers, USB connectivity, and the kind of traditional folding treadmill experience that the current range has moved away from. The T550 sits at the top with a 156 × 51 cm deck and 12.4 mph top speed — a genuinely capable running treadmill that competes with machines from Reebok and NordicTrack at similar price points.
All legacy models include 16-point cushioned decks, soft-drop hydraulic folding, transport wheels, and heart rate monitoring via handlebar sensors. Build quality is solid — the thousands of Amazon reviews consistently praise sturdiness and motor performance, with occasional complaints about delivery logistics and minor assembly issues.
If you are comparing a legacy JLL to the current range, be aware that the legacy models are significantly larger and heavier. These are not walking pads. They are full-sized treadmills that need dedicated floor space, and they fold rather than flatten.
Which JLL Treadmill Should You Buy?
Four current models and a back catalogue of legacy machines is a lot to wade through. Here is the short version.
Work from home and want to walk at your desk? → Helius Lite Treadpad. Folds flat, works without a handrail in walking mode, quiet enough for video calls. The only under-desk option in the range.
Want a proper console with programs but still need compact? → Sunny Slim Interactive. Fixed display, 15 preset programs, 8 mph top speed. The Helius with a console, minus the under-desk capability.
Heavier user who needs more deck width? → JLL Pegasus. 51 cm wide belt and 120 kg capacity in a package that still folds flat. Basic manual incline is a bonus.
Want to actually train — incline work, jogging, intervals? → Sunny Auto Incline. The only current model with powered incline and the fastest at 9 mph. The clear best-buy in the current range.
Want a traditional running treadmill with real speed and full incline? → JLL S300 or T350 from Amazon. Faster motors, 20-level powered incline, bigger decks. The machines that built JLL’s reputation. Just factor in that these are legacy models with uncertain long-term parts support.
JLL Warranty and Support
JLL’s warranty terms vary by model and have changed as the product range has evolved.
Current models sold through jllfitness.co.uk carry a minimum of 12 months parts and labour warranty, with some models offering 2 years on parts and up to 5 years on the motor. Specific terms are listed on each product page. The SunnyFit app ecosystem is free to use with no subscription required.
Legacy models purchased through Amazon are covered by Amazon’s standard 30-day returns policy plus whatever JLL warranty was included at time of purchase. Historically, JLL legacy treadmills carried 2 years parts and labour and 5 years on the motor — generous for the price bracket. Whether JLL will continue honouring legacy warranties as they shift product focus is worth asking their support team before buying.
All warranty support runs through JLL’s Birmingham-based team. This is a meaningful advantage. You are dealing with a UK company, with UK phone support, and UK-based service. Not a foreign call centre, not a Google Translate email chain, not a brand that vanishes after three months on Amazon. JLL has been operating since 2012 and has a physical showroom you can visit. That counts for something when your treadmill needs a replacement belt two years in.
JLL Treadmills FAQ
Are JLL treadmills good?
JLL’s legacy models (S300, T350, T550) have an excellent reputation for build quality and value, backed by thousands of positive Amazon reviews. They fill the gap between unreliable no-name brands and expensive premium manufacturers. The current range is newer and unproven over time, but the shift to brushless motors and Sunny Health & Fitness partnership suggests a focus on quieter, more compact machines rather than the traditional running treadmills that built the brand.
What is the relationship between JLL and Sunny Health & Fitness?
JLL is the official UK distributor for Sunny Health & Fitness, an American fitness equipment company. This means the JLL website sells both JLL-branded products (Helius, Pegasus) and Sunny-branded products (Slim Interactive, Slim Auto Incline). All are sold, delivered, and supported by JLL’s UK team. The SunnyFit app works with all models regardless of branding.
Which JLL treadmill is best for running?
None of the current models are designed for serious running — the fastest tops out at 9 mph with no full-size running deck. For running, the legacy T550 (12.4 mph, 156 × 51 cm deck) or T350 (11.2 mph) are the JLL options, both available on Amazon UK. If you want a current-production running treadmill with manufacturer support, consider the Reebok Jet 300 or models from our best under £1,000 guide.
Do JLL treadmills need a subscription?
No. All current JLL and Sunny-branded models work without any subscription. The SunnyFit app is free and adds guided workouts, progress tracking, and community features, but every treadmill functions fully without it. Legacy models have no app requirement at all.
Is the JLL S300 still available?
Yes, occasionally through Amazon UK. The S300 is no longer listed on jllfitness.co.uk but remains in stock on Amazon with active listings and Prime delivery. It is JLL’s most-sold treadmill, with a 4.5 HP peak motor, 20-level powered incline, and 132 × 41 cm deck at around £590. Just be aware it is a legacy model — parts and warranty support may become limited over time.
Is the JLL T350 better than the S300?
The T350 is faster (11.2 mph vs 10 mph) and has 20 built-in programs compared to the S300’s 15, but has a slightly smaller deck (121 × 41 cm vs 132 × 41 cm). Both share 20 levels of powered incline and 120 kg capacity. The S300 is better for walking and jogging where deck length matters. The T350 is better if top speed matters more. Both are around £550–£600 on Amazon.
Where are JLL treadmills made?
JLL is designed in Birmingham, UK. Like virtually all home fitness equipment sold in the UK regardless of brand, manufacturing takes place in China. JLL’s quality control, customer service, and warranty support operate from their Birmingham headquarters.
Can I visit the JLL showroom?
Yes. JLL operates a showroom at their Birmingham headquarters where you can view and try equipment before buying. Contact them through jllfitness.co.uk for opening hours and appointments.
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