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Talk to a treadmill specialist| Motor | 3.75 HP |
| Max speed | 1.0 to 20 km/h |
| Running surface | 150 x 52 cm |
| Incline | Power Incline |
| Console | LCD |
Serious daily runners who train at 15 km/h or faster get a 3.75 CHP brushless motor and a 1500 mm x 520 mm belt with room to open up a full stride. The Viper M4 handles users up to 180 kg and climbs 18 automatic incline levels, so hill sessions and heavy interval work stay steady.
It suits a runner who wants a fixed, gym-grade machine as the centrepiece of a home setup, with 24 preset programs, a 400m track readout on the LCD, and a lifetime motor and frame warranty backing the build.
What stands out is the 3.75 CHP brushless motor paired with a lifetime motor and frame warranty. That combination tells you Lifespan expects this deck to outlast your running habit.
It doesn't fold, so confirm the 193.5 cm footprint is permanent before building it. The 520 mm belt is where it earns its keep: rare width at this size, comfortable for taller runners.
Adela Ledvinkova · Bachelor of Exercise & Sport Science · Our In-House Fitness Coach
The brushless design removes the carbon brushes that wear out on cheaper treadmills, so the motor stays quiet and holds its output over years of daily use.
At 3.75 CHP, it drives the belt without straining when you push into faster running work.
What this means for you: For a daily runner, this is the part I'd stake the recommendation on: enough headroom to sit at pace without the motor labouring.
The cushioning softens footstrike as your foot lands, so a long session feels less jarring underfoot than a bare, hard deck.
In practice, it gives more give than a plain deck without turning spongy, which I prefer for real running.
What this means for you: Read it as comfort over a long run, not as anything clinical.
Eighteen motorised incline levels let you add hill work at the touch of a button, and the 24 preset programs vary speed and gradient for you so you are not just plodding at one setting.
Quick controls at 3, 6 and 9 jump you straight to a speed or incline mid-session without scrolling.
What this means for you: The incline is where you get fitter faster; hill intervals do more for a busy schedule than flat walking.
Setting up the Viper M4 is a one-person job of roughly 30 to 45 minutes for a first build, with all bolts and fixings included in the box.
You'll need a screwdriver, an allen or hex key and a spanner or wrench to finish the assembly.
What this means for you: If it isn't right for you, the 100-day money-back guarantee gives you time to be sure once it's built.
| Motor | 3.75 CHP EverDrive® H7X Brushless Motor |
| Speed Range | 1.0 to 20 km/h |
| Incline | 18 levels, automatic |
| Running Surface | DuraGrip® Ultra, 1500 mm x 520 mm |
| Cushioning | ShockControl™ Advanced Cushioning System |
| Max User Weight | 180 kg |
| Console / Display | Backlit LCD showing speed, time, distance, calories, incline, pulse and a 400m running track |
| Programs | 24 preset programs |
| Connectivity | Bluetooth (for music) |
| Entertainment | Integrated iPad/tablet/book stand, built-in speakers |
| Fitness Apps | FitLink |
| Assembled Dimensions | 193.5 cm (L) x 83 cm (W) x 149 cm (H) |
| Product Weight | 107.5 kg |
| Warranty | Lifetime (5 Years) on motor and frame, 24 months on parts |
| Quick Controls | 3, 6, 9 preset speed and incline levels |
| Portability | Transportation wheels |
| Foldable | No |
Effort: a one-person job, around 30 to 45 minutes for a first build. Tools: a screwdriver, allen / hex key and spanner / wrench (bolts and fixings are included).
The EverDrive H7X brushless motor is the quiet part here. At a walk it's barely noticeable; push toward 15 to 20 km/h and the motor stays smooth, so most of the noise you hear is your own footstrike on the deck. On upstairs installs, a 6 mm rubber mat under the frame cuts the transfer to rooms below.
The DuraGrip Ultra belt runs 1500 mm long by 520 mm wide, which is a generous surface. For walkers and joggers of any height it's plenty. If you're over about 190 cm and sprinting near 20 km/h, you'll want to stay mindful of your stride length, but for daily running at home this belt has the room.
Assembled, it's 193.5 cm long, 83 cm wide and 149 cm tall. The height clears a standard 2.4 m ceiling easily, even accounting for your own height while running. It doesn't fold, so pick a permanent spot before you build it. Transport wheels let one person reposition it once it's assembled.
The 3.75 CHP motor and 180 kg max user weight make this one for households where the treadmill gets real use, not the odd walk. It handles daily runners without straining, and the 18 automatic incline levels plus 24 preset programs give you room to progress. Best for: committed home runners who want a machine that keeps up.
It's a one-person job, around 30 to 45 minutes for a first build. You'll need a screwdriver, an allen/hex key and a spanner. All bolts and fixings come in the box. The unit weighs 107.5 kg assembled, so having a second person on hand to steady the frame during the upright steps makes it easier.
You get a lifetime (5 years) warranty on the motor and frame, plus 24 months on parts. A lifetime motor warranty isn't marketing; it's the brand expecting the EverDrive H7X to outlast your interest in running. All warranties are local Australian warranties handled by us, so you're not chasing an overseas manufacturer if anything comes up.
Take photos before unpacking and send them to support@cardioonline.com.au within 48 hours of delivery. We'll lodge the freight claim, organise replacement parts or a full unit, and stay across it until you're running. You don't deal with the courier or the manufacturer directly, that's our job.
If this model carries the 100 Day Money-Back Guarantee badge on its page, you have 100 days to request a return. The treadmill needs to be as-new, fully disassembled and repackaged in the original box with all parts. No restocking or cancellation fee. Return shipping is yours, and we can book it for you.
Click below to download the user manual.
This product ships in 2-3 business days after you place your order.
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Try it for 100 days. Return it if it is not right.
If your equipment is not right for your space or your training once you have lived with it, you can request a return within 100 days of purchase for a refund of the product price.
Available on products showing the 100 Day Money Back Guarantee badge. Return shipping is paid by the customer unless otherwise agreed. Original delivery, installation and service fees are non-refundable. See the full policy: /pages/risk-free-returns
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