SF-T7873 Folding Treadmill Review  

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In 2019, Sunny Health & Fitness launched the SF-T7873 treadmill, a folding treadmill model that to this day remains one of the most chosen by users.

This machine comes with a 2.5 HP engine, presents 9 training programs, and is more compact than other models because it is for domestic use. It can automatically incline up to 15 levels and make your workouts even more challenging.

You can check all the data of your progress on your console and fold its deck when finished.

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What I Like About

  • The console allows you to check the time, distance, calories, and other fitness metrics.
  • It runs silently, which is ideal for running at any time without disturbing.
  • You can transport it thanks to its wheels.
  • It offers 9 different training programs.
  • Its construction is made of resistant steel.
  • Its cover absorbs the impact since it is padded.
  • Ability to measure body fat.
  • Allows running at speeds up to 11 MPH.
  • It offers a console with hotkeys for easy configuration.
  • Its maintenance is minimal and inexpensive.
  • The console screen has an LED light for better observation.
  • Save space as it is foldable.
  • Water bottle holder.
  • Built-in speakers and headphone’s port.
  • It has heart rate sensors.
  • Its automatic incline level is 0% -15%.
  • Ability to measure body fat.
  • Simple assembly.
  • Supports a weight capacity of up to 285 pounds.

What I Don’t Like

  • It does not offer a USB connection.
  • It does not offer an internet connection.
  • Does not include a tablet holder.

Frame and Construction

This treadmill is made of steel and is extremely heavy-duty for all users who want to train with the Sunny Health & Fitness SF-T7873,

The frame is completely covered in metallic gray paint, which prevents rusting and protects from scratches.

On the other hand, the treadmill also has built-in ABS, as with the board, among other parts. This material is a plastic that is heat resistant.

In terms of size, the Sunny SF-T7873 is 62″ long x 38″ wide. It may not be one of the largest models of the brand, but it is of medium size. You can save space, especially if you fold it to store it in the space of 26.5″ L x 38″ W.

The machine has stabilizers at the front base of the frame, at the ends of the middle base, and the rear.

This allows you not to lose balance when training. Also, to transport it easily when it is folded, the machine has wheels in the middle and rear part.

Running Area

The Sunny Health & Fitness SF-T7873 is built with a belt that has the following dimensions: 52.5″ L x 16″ W. As we mentioned earlier, this model is not the largest offered by the brand, but people up to 6′ 0″ will train without problems.

If you are taller than the mentioned height, you can also train, but you may not fully extend your legs.

Beyond your height, the belt is very strong and supports users up to 285 lbs.

Its resistance is built in a multi-ply belt, so you will run on a strong rubber surface to avoid slipping.

On the other hand, this treadmill has protection against impact thanks to its rubber pads located under the side rails.


The Sunny treadmill comes with a 15% incline, allowing you to turn your workouts into real challenges. You can adjust the incline according to your preference; all you have to do is touch the buttons on the console.

The machine’s frontal part will automatically incline in just one second to 15% range or less.

In any case, it should be noted that the belt surface at 0% is not completely flat, i.

e., it already has a small natural inclination. For the belt to be raised with the push of a button, the treadmill has a small elevator with a motor that works specifically for this function.

Every time you need to incline the treadmill’s surface, the motor acts as an activator for this elevator so that the surface goes up or down, leaving it in an inclined position as if you are going to climb a mountain.

Step-up Height

The distance from the ground to the running surface, i.e., the belt, is 9”. by inclining the front of the machine, it rises, increasing its height a few inches.

That is why it is recommended to train in a room with a higher ceiling than you (at least about 16”).

Motor and speed

The SF-T7873 is a machine that works with a 2.5HP motor. This electric treadmill is designed to work personally for the home, so it does not have the same power as a commercial-level treadmill where it is running all the time.

However, this motor performs very well, although it is recommended to let it rest for about 10 minutes after being used for 2 consecutive hours.

As for its speed, this treadmill allows you to reach a maximum speed of up to 11 MPH thanks to its motor.

You can go up the speed of 0.1 MPH until you find the ideal speed for you.

You just have to touch the buttons on the right grip to change the speed if you don’t want to let go of your hand or do it directly from the console.

The console also offers preset speed buttons of 1 MPH, 3 MPH, 5 MPH, and 9 MPH to be more punctual.

If we speak in terms of energy consumed by this treadmill, we must emphasize that it consumes little energy since the motor is small.

This means that even if you train every day, your electricity consumption will be minimal.


Like all electric treadmills, the Sunny SF-T7873 offers an easy-to-use console. So that you can work out even in a room with poor lighting, the LCD screen has an LED light.

You will obtain specific data such as time, calories consumed, distance, and heart rate.

In addition, you can change the incline level, the distance, and 9 training levels.

These training levels are based on the speed, time, incline, and calories you burn per session.

But don’t worry, its user manual has all the training specifications so you know how or what you should do.

The more you level up, the more difficult the training is.

Another function that the console offers is an HRC program.

This program consists of the heart rate you want to have, and accordingly, the speed will be adjusted automatically.

Also, you can obtain a reading of your body mass by entering your data (weight, height, etc.) and, thus, train according to the result.

Finally, the console has 2 speakers and a media port to listen to MP3 songs by connecting your phone and two bottle holders. The good thing is that it does not matter the type of bottle you have because they are universal holders (any bottle size and design can fit there).


Assembling it is not complicated because you will receive it practically assembled.

With the help of the tools included in the machine package and following the manual user step-by-step assembly, one of your tasks will be to fix the two vertical bars and add the base joint covers.

If necessary, you can lubricate the deck and adjust the belt tension.


Maintenance is important for the treadmill to last for many years. It includes cleaning every corner of the machine to prevent dust from reaching the engine and its functional parts.

Also, if the machine is used more than 5 hours per week, it is important to lubricate the running deck once every two months. But if it is used less than those weekly hours, you can lubricate it once every six months.

As for the engine, it should be cleaned at least three times a year.

When you do this, be sure to follow the instructions in the manual for good treadmill maintenance.

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