Motor: 3.25 HP Johnson Drive | Speed: 0.5–12.5 mph | Incline: 0–15% | Deck: 153 × 56 cm (60 × 22 in) | Cushioning: AirTrain + Variable Response | Max user weight: 180 kg | Folding: Yes, hydraulic | Price: £1,699
The Horizon Paragon X is the flagship of the range and the most interesting treadmill Horizon makes. Its headline act is AirTrain Technology, an air-cushioning system beneath the deck that changes firmness on the fly to simulate four outdoor surfaces, grass, dirt, gravel and stone, across 10 trail-running competitions from around the world. For runners who want their indoor sessions to feel as close as possible to the trail, there is nothing quite like it at this price. Add a wider deck, a steep 15% incline and a class-leading 180 kg user capacity, and the Paragon X earns its place at the top of the Horizon lineup.
At £1,699 it sits above the runner-focused 7.4 AT (£1,499). You are paying the premium for the AirTrain experience and the higher weight capacity rather than raw motor power, so whether it is worth it depends on what you want from your running.
Who it’s for: trail and outdoor runners training indoors, anyone training for an event who wants varied terrain, heavier users who need the 180 kg capacity, and enthusiasts who simply want Horizon’s most immersive machine.
Who it’s not for: budget buyers, who should look at the Omega Z, walkers and casual users, and runners who only want a straightforward, powerful road-style treadmill, where the 7.4 AT delivers more motor for less money.
Horizon Paragon X Specs
| Motor | 3.25 HP, Johnson Digital Drive (recalibrates each footfall) |
| Speed range | 0.5 – 12.5 mph (0.8 – 20 km/h) |
| Incline range | 0 – 15% |
| Running deck | 153 × 56 cm (60 × 22 in) |
| Cushioning | Variable Response Cushioning + AirTrain Technology (grass, dirt, gravel, stone) |
| Terrain modes | Beginner, cross-country, competition; 10 trail competitions |
| Belt thickness | 2.2 mm |
| Frame | Open frame, hydraulic folding |
| Assembled dimensions | 206 × 97 × 147 cm |
| Folded dimensions | 114 × 97 × 181 cm |
| Machine weight | 127.5 kg |
| Max user weight | 180 kg (397 lb / 28 st) |
| Display | 3 white LED windows + capacitive touch controls |
| Programmes | Over 20 onboard, including Sprint 8 HIIT and 10 AirTrain trail courses |
| Connectivity | Bluetooth FTMS; @Zone app, Kinomap, Zwift; hand pulse + Bluetooth chest strap receiver |
| Warranty | Confirm current frame, motor and parts terms with Fitness Options at checkout |
| Price | £1,699 (was £1,999) at Fitness Options |
Key Features and Benefits
AirTrain Technology
This is the Paragon X’s reason to exist. Beneath the deck sits an air-cushioning system that inflates and adjusts firmness in step with pre-programmed changes in speed and incline, simulating the feel of grass, dirt, gravel and stone underfoot. It is tied to 10 trail-running competitions modelled on real courses across North America, Asia and Europe, and you can run them in beginner, cross-country or competition modes, or set the firmness manually. For anyone training for an off-road event or who simply finds flat treadmill running monotonous, this turns a session into something genuinely varied and engaging. Nothing else in this price range offers it.
Motor and Speed
The 3.25 HP Johnson Digital Drive motor recalibrates with every footfall and, like the rest of the range, runs at low RPM to stay quiet and durable. It is slightly less powerful on paper than the 7.4 AT’s 3.5 CHP unit, which is the one thing to weigh up: the Paragon X is built around terrain feel and capacity rather than maximum horsepower. In practice it handles the full 0.5 to 12.5 mph range smoothly and stays impressively quiet even at pace, so you can train at any hour without disturbing the house.
Incline and Deck
You get a steep 0 to 15% power incline, confirmed across Horizon’s own and UK retailer specifications, which combined with the AirTrain terrain modes makes for genuinely demanding hill and trail sessions. The 153 by 56 cm (60 by 22 inch) deck matches the 7.4 AT for width and length, giving runners ample room to open up their stride. A 2.2 mm belt sits on top of the variable cushioning for a stable, planted feel.
Highest User Capacity in the Range
At 180 kg (397 lb), the Paragon X has the highest maximum user weight of any Horizon treadmill covered here, comfortably above the 159 kg of the Omega Z and the 147 kg of the AT models. If you are a heavier runner, that headroom matters both for safety and for the machine’s longevity, and it is one of the strongest reasons to choose the Paragon X over its siblings.
Console, @Zone and Connectivity
The modern, high-gloss console uses three white LED windows and capacitive touch controls, with one-touch run control to start and stop at the press of a button. It supports Bluetooth FTMS, so compatible apps can interact with the machine, and connects to the @Zone app, Kinomap and Zwift. The @Zone app lets you race other users through exotic locations and climb a global leaderboard, while heart rate is tracked via hand-pulse sensors or an optional Bluetooth chest strap. Onboard, there are more than 20 programmes including the proven Sprint 8 HIIT workout.
Folding and Footprint
Despite its premium build, the Paragon X uses a hydraulic folding system and front transport wheels, and at 127.5 kg it is actually lighter than the 7.4 AT. Folded, it shrinks to a 114 cm footprint, though it is a tall machine when stored, so check your folded-height clearance. As with any 15% incline treadmill, leave extra ceiling room for the raised deck at full gradient.
Horizon Paragon X Pros and Cons
Pros
- Unique AirTrain trail-terrain simulation
- Steep 15% incline and wide 56cm deck
- Class-leading 180 kg user capacity
- Quiet, footfall-recalibrating motor
- FTMS Bluetooth plus @Zone, Kinomap and Zwift
- Over 20 programmes including Sprint 8
- Open platform, no compulsory subscription
Cons
- Most expensive in the range
- 3.25 HP motor is smaller than the 7.4 AT’s 3.5 CHP
- AirTrain is niche if you only run flat road-style
- Tall when folded
- Needs ceiling clearance at full incline
How the Horizon Paragon X Compares
vs Horizon 7.4 AT (£1,499): The closest decision in the range. The 7.4 AT gives you a bigger 3.5 CHP motor and an 8.25-inch LCD for £200 less, making it the better pure-running value. The Paragon X counters with AirTrain terrain simulation and a higher 180 kg capacity. Choose the 7.4 AT for straight-line power, the Paragon X for trail feel and capacity.
vs Horizon Omega Z (£899): The Omega Z is half the price and the sensible everyday choice for walkers and joggers. The Paragon X is the enthusiast’s flagship, justified only if you want the AirTrain experience or need the higher weight capacity.
vs NordicTrack at this price: A premium NordicTrack offers iFIT-led classes on a large touchscreen, with the experience tied to a subscription. The Paragon X takes a different route entirely, building its immersion into the hardware through AirTrain rather than into a streaming subscription. If you want terrain realism without a monthly fee, the Paragon X is the more interesting buy.
Verdict
The Horizon Paragon X is the most distinctive treadmill in the range and the pick for runners who want their indoor training to feel like the trail. AirTrain terrain simulation, a steep 15% incline, a wide deck and a 180 kg capacity make it a genuine flagship, and the open platform means none of it depends on a subscription. Its motor is marginally smaller than the 7.4 AT’s and it carries a price premium, so it is best suited to trail and event runners and heavier users rather than budget-minded buyers. For the right runner, though, nothing else at this price offers the same experience.
Horizon Paragon X
£1,699 (was £1,999). Spread the cost over 6 months with Klarna.
Horizon Paragon X FAQs
What is AirTrain Technology on the Horizon Paragon X?
AirTrain is an air-cushioning system beneath the deck that changes firmness as your speed and incline change, simulating four outdoor surfaces: grass, dirt, gravel and stone. It is tied to 10 trail-running competitions you can run in beginner, cross-country or competition modes, making indoor running feel closer to the trail.
What incline does the Horizon Paragon X have?
The Paragon X has a 0 to 15% power incline, confirmed across Horizon’s own and UK retailer specifications. Combined with the AirTrain terrain modes, it allows for demanding hill and trail-style sessions.
Is the Paragon X better than the 7.4 AT?
It depends on what you want. The 7.4 AT has a bigger 3.5 CHP motor and an LCD screen for £200 less, so it is better value for straight-line running. The Paragon X adds AirTrain terrain simulation and a higher 180 kg user capacity, making it better for trail runners and heavier users.
What is the maximum user weight of the Paragon X?
The Horizon Paragon X supports up to 180 kg (397 lb), the highest capacity in the Horizon range covered here and well above most folding treadmills, which makes it a strong choice for heavier runners.
Does the Paragon X need a subscription?
No. The Paragon X is open platform, so all its onboard programmes and AirTrain features work with no subscription. You can optionally connect the @Zone app, Kinomap or Zwift over Bluetooth, but none are required.
How much does the Horizon Paragon X cost in the UK?
It is currently £1,699 at Fitness Options, down from £1,999, with the option to spread the cost over 6 months with Klarna. Prices change with promotions, so check the current price before buying.
HomeTreadmill.co.uk is reader-supported. When you buy through links on our site, we may earn an affiliate commission at no extra cost to you. This does not influence our RunRank ratings or which models we recommend. Specifications and prices are accurate at the time of publication and may change; confirm details with the retailer before purchase.
