Sunny SF-T7515 Smart Treadmill Review

Sunny SF-T7515 Smart Treadmill Review

The Sunny SF-T7515 smart treadmill is an excellent commercial-grade treadmill with Auto Incline. It is one of the most popular brand best-sellers. For a reasonable price, you get a compact model, which makes it a perfect choice for anyone with limited space. This treadmill is packed with state-of-the-art technology that will keep you connected and engaged. Moreover, it’s built with a microphone, integrated speakers, and its Bluetooth and MP3 connectivity allows users to answer calls and listen to music. 

Furthermore, the Sunny SF-T7515 smart treadmill features a large backlit LCD monitor that displays distance, speed, time, inclines, calories, and heart rate( displaying your 12 workout programs). It also displays your results after your workout to keep you motivated. You’ll see your progress on a digital garage and play music via Bluetooth.

Specifications (L X W)

  • Assembled dimensions: 64.5 x 28 x 50.5 inches
  • Tread belt dimensions: 49.5 x 16.5 inches
  • Assembled weight: 121 lbs.
  • Supported weight: 250 lbs.
  • Speed range1 to 8mph
  • Motor: 1hp (Horsepower)
  • InclineAutomatic, 12 levels
  • Console: 12 programs, 3 user profiles, Bluetooth
  • Extras: Tablet shelf, bottle holders, sound system
  • Warranty: Frame 3 years / Parts 90 days

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Features & functions

The Sunny SF-T7515 smart treadmill is a budget-friendly and compact machine that packs enough features to make it unique among the competition in the same price range. When talking about efficiency and performance, the Sunny SF-T7515 smart treadmill has a top speed of 8mph. Although this may be fast enough for a beginner, it’s barely getting up to a sprint for the experienced runner. However, it has a maximum incline of 12% with 12 settings from 0 through to 12. It’s important you know that 12% is equivalent to 6.9 degrees, so if burning excess calories or fat is your main objective, then running at 8mph on an incline of 12% for just 3 minutes is enough. 

In addition, coming to the motor of this treadmill, it’s a 2.2hp (horsepower), but note a CHP (continuous horsepower) motor is better as it’s smoother running and more reliable. The motor is not so noisy and seems a good choice at the midrange speed, though it starts to get noisier at the top end. 


Warranty on all components is 90 days. Most users don’t report having problems with the motor for at least a year, and if any problem arises at all, most can be solved with a relatively cheap repair. Sunny has a better reputation for after-sales and customer service. They really do their best to make their customers happy.

Frame and Deck

This excellent treadmill has a steel frame that is durable enough to support users up to 250 lbs (113 kg). Also, the machine’s construction features several ABS components. Its steel bars have a corrosion-resistant paint finish; the main color is white, with the Sunny logo painted red. When fully assembled, the frame weighs more than 120 lbs. Thus it offers more stability despite the fact that it is a small machine. Since the Sunny SF-T7515 is a treadmill for walking and light jogging, it is not extremely large, and its fully assembled footprint is 64.5″L x 28″W (164 x 71 cm). Also, its deck is foldable, and you can lift it up and lock it in an upright position. And this way, the machine’s length remains approximately 40″ (101 cm).

Incline & step-up height

Sunny SF-T7515 smart treadmill comes with a motorized incline system. The incline system is digital and can be adjusted from the left handlebar or the console controls. The preset programs involve incline( which allows the machine to automatically adjust the deck’s ramp). There are 12 incline levels available in the SF-T7515, from 0% to 12% (or 0° – 6.9°). The incline increments are 1%. In addition, the console also has quick incline controls for the 3%, 6%, 9%, and 12% positions.


Sunny SF-T7515 smart treadmill is equipped with a light capacity motor of only 1 HP peak power, making it an excellent walking treadmill. However, since it’s a motorized treadmill, it requires a connection to a power circuit. For that reason, A 3ft power cord comes with the unit, and the connector is at the front base of the deck. The motor of this treadmill can speed up to 8.0 MPH (12 km/h). It has a default speed of 1mph, but up from that, you can adjust the speed in increments of 0.1mph. In addition, there are speed controls on the console and built-in the right handlebar, and the console gives quick speed controls for the 2mph, 4mph, 6mph, and 8mph speed settings.


Sunny SF-T7515 smart treadmill has an LCD display with a blue LED backlight, and it’s divided into sub-sections and displays multiple workout metrics at once. With this, you don’t have to use a scan function to alternate them. It also tracks distance, time, calories, speed, pulse, and incline. The console of this treadmill is Bluetooth enabled, so you can sync with your phone and take phone calls with the treadmill’s speakers while you still exercise. However, it is not iFit capable, and you cannot use the Bluetooth connection to stream workout data on any fitness site or app. In addition, the console offers 12 workout programs with a Body Mass Index feature available. There also are three user profiles available.

Assembly & Maintenance

The Sunny SF-T7515 smart treadmill comes folded into a flat position, and it’s fully assembled. You have to unfold the console masts, secure them in the upright position via the included screws, and add the protective joint covers. You get a manual that instructs you how to assemble this treadmill, and you get a basic toolkit for assembly as well. Also, the deck requires periodic lubrication, and it’s important to always check for loose parts and bolts and re-center the belt if necessary.


  • Sturdy construction for a walking treadmill
  • Can support users up to 250 lbs.
  • Folding deck, soft-drop hydraulic system
  • Transport wheels
  • Adjustable stabilizers
  • Shock absorption elements integrated into the deck
  • Motorized incline, 12 levels (up to 12%)
  • LED-backlit display
  • Body Mass Index function
  • Goal settings for time, distance, and calories
  • Bluetooth connection: for the sound system and phone calls
  • Pulse sensors integrated into the handlebars


  • A tablet placed on the tablet holder will cover the quick speed controls, and partially, the console display;
  • There’s no workout fan.
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