REF: 8529879



In stores: October 2018

Designed for running at home so you can stay in shape and work on your cardio fitness and muscle tone. The T900B treadmill was designed for regular and high-intensity running. It makes the perfect partner for indoor workouts aimed at developing your performance.



VERSATILITY: High-performance with a maximum speed of 18 km/h and an incline of up to 10%

USER COMFORT: Running surface of 50cm wide by 143cm long, perfect for long strides

COACHING: 32 adjustable pre-set programmes. Compatible with the Domyos app

Assembling and setting up

Thank you for purchasing a Domyos product. To help you get your equipment up and running, click on the video to see the different set-up steps.

Setting up and using your product

Thank you for purchasing a Domyos product. We've gathered together some handy tips to help you when you first set up and use your machine.

What is a training programme?

This treadmill offers 32 pre-set programmes that vary the speed and incline in order to respond to different goals.

The 8 "TRAINING" programmes are designed to help you increase your aerobic power and develop your capacity to work out harder for longer.

What is an endurance programme?

This treadmill offers 32 pre-set programmes that vary the speed and incline in order to respond to different goals.

The 8 "ENDURANCE" programmes give you a workout that boosts your aerobic capacity and basic endurance. This type of training strengthens your heart muscles and improves your respiratory capacity. Train at least three times a week at a fast pace (fast breathing). The more you train, the longer you will be able to sustain this level of effort at a faster pace.Training at a faster rate (anaerobic work and red zone work) is reserved for athletes and requires appropriate preparation.

Directions for use

1. If you are a beginner, start by training for several days at a low speed, without overexerting yourself, and taking rest periods if necessary. Gradually increase the number or duration of your workouts. During your workout, be sure to ventilate the room where your treadmill is located.

2. Cooling down: After each workout, walk a few minutes at a low speed to gradually bring the body to rest. This cool-down phase helps bring your cardiovascular and respiratory systems, blood flow and muscles back down to normal. This makes it possible to eliminate counter effects such as lactic acid build-up, which is one of the major causes of muscle pain (cramps and muscle aches).

3. Don't forget to stretch. We recommend that you stretch and hydrate after each workout to relax your muscles and promote recovery.

How to start your product

1. Plug in the power cord.

2. Flip the switch near the power cord to "I".

3. Stand on the treadmill's footrest.

4. Clip the safety key to your clothing.

5. Insert the safety key into the slot on the console.

6. Your screen will light up and display GO.

7. Your treadmill is ready to use!

How can you see the total distance and time run on the treadmill?

You are able to see how far you have run and how many hours of running you have done since first starting your treadmill. This can be done as follows:


What is a calories programme?

This treadmill offers 32 pre-set programmes that vary the speed and incline in order to respond to different goals.

The 8 "Calories" programmes give you a workout designed to burn fat during and after exercise.

This type of workout allows you to burn calories effectively. There is no need to force yourself to go beyond your limits; the frequency (at least three times per week) and the duration of your workouts (35 to 60 minutes) will lead to best results. Exercise at a medium speed (moderate effort without shortness of breath).

To lose weight, in addition to regular physical activity, it is essential to eat a balanced diet.

What is a healthy programme?

This treadmill offers 32 pre-set programmes that vary the speed and incline in order to respond to different goals.

The 8 "Healthy" health and well-being programmes keep you moving, tone you up and improve your respiratory capacity.

To maintain your fitness or for rehab, work out every day for at least 10 minutes. This type of exercise helps work the muscles and joints gently and can be used as a warm-up before more strenuous physical activity.

To increase muscle tone in the legs, choose a greater incline and increase the duration of the exercise.



Is your equipment properly set up but you're still having an issue when using it? See all our FAQs here.

You're getting an e1 error code

The electronic card or the console isn't receiving data.

1. Check whether there is a bent pin or a cut wire.

Check that the treadmill is connected as shown in step 7 of the instructions.

T900B Error E1
Your console isn't showing the right speed

Before you start, make sure your treadmill is plugged in to the mains.

1. Press the "STOP" button.

2. Hold down the "STOP" button and insert the "SAFETY KEY".

3. The units being used are displayed in the bottom right corner:     UNIT MI   or  UNIT KM.

4. Press "+" to change the unit.

5. Press "STOP" to confirm the changes.

6. You can now use your treadmill.


Your treadmill doesn't switch on

1. Check that the power cord is plugged into a working mains socket (to check if the wall socket is working, plugin a lamp or other electrical device).

2. Check that the other end of the power cord is connected to your treadmill.

3. Check that the main switch near the power cord is set to I.

4. Check that the safety key is pushed fully home in the console.

Your treadmill is making a noise

1. Shoes:

=> The noise you can hear could be the sound of your shoes on the running belt. To check that the noise isn't coming from your shoes, please see the video below


2. The screws are loose:

 => Tighten all of the screws.


3. The running belt is wonky:

=> Select the "CENTRING THE RUNNING BELT" tab in the MAINTENANCE section.


4. The running belt is not lubricated:

=> Select the "RUNNING DECK LUBRICATION" tab in the MAINTENANCE section.

How do you activate/deactivate the console's beep?

When you press a button on the console, a beep notifies you that your action has been taken into account. You can deactivate this beep:

1. Access the home "GO" screen on the console by clicking the "STOP" button several times.2. Press the "+" to turn the "beep" sound on. / Press the "-" to turn the "beep" sound off.3. To exit, wait for 5 seconds until the display returns to GO.

The treadmill slows down when you step onto it

The running belt is slack

=> Select the "RUNNING BELT TENSION" tab in the MAINTENANCE section.


The treadmill switches off during use

1. If your treadmill is plugged in to an extension cable, unplug it and plug it directly into a wall socket.

2. The problem could be caused by the power cord. In this case, please see the FAQ on ""YOUR TREADMILL IS NOT SWITCHING ON""

Trouble detecting heart rate with the handpulse sensors

Slightly dampen your hands and place both hands on the sensors.


The "go service" message appears on your screen

Every 200 km, the word "service" flashes up on the "GO” home screen. This message reminds you that your equipment is due for a service.


To delete the flashing message:

Access the start/home "GO" screen on the console by clicking the "STOP button several times."

Hold the "STOP" and "^"buttons down for a few seconds.

You've got a problem with your cardio fitness app

Is your equipment working properly but you're having a problem with the application? Click the "MY APP" button for troubleshooting tips.

Parts diagram

Not able to fix your problem or find the right answer?


Centring the running belt

You will need the 6mm Allen key (BTR) that came with your treadmill: 

1.  Start your treadmill at a low speed (4km/h).2.  Insert the key into the screw on the side where the running belt is off-centre.3. Turn it a quarter turn clockwise (wait 30 seconds between each quarter turn) until the belt is back in the correct position.


Running belt tension

The running belt is a wearing part that becomes loose over time. Re-tighten it as soon it begins to go slack (sliding sensation, jerky motion).


1&2. Turn the two adjustment screws a half turn clockwise (repeat if necessary, but make sure you don't over-tighten the belt).


3. The belt is properly tightened if you can lift the edges 3 to 5 cm on each side.

Regular maintenance

Regular maintenance is necessary to preserve the performance of your appliance and extend its service life. To get rid of any annoying noises coming from your treadmill, remember to:

                       Tighten the screws and bolts once a month.

                       Lubricate the running belt after 200 hours of use.

                       Place a standard floor mat (Domyos Training Mat) under your treadmill.



                      Turn off and unplug your treadmill.

                      Apply a small amount of gentle universal cleaner to a pure cotton cloth. Do not spray the cleaner directly onto the treadmill and do not use ammonia or acid cleaners.

                      Wipe the console and screens.

                      Remove any dust and stains on the ramps, uprights, footrests, frame and motor hood. Remember to also wipe the platform alongside the running belt. Do not clean under the running belt.

The "go service" message appears on your screen
Preventative maintenance

1. Check the motor and the drive belt every 600 hours of use or every 3,600km*2. Replace the running belt every 500 hours of use or every 3,000km*3. Replace the running deck every 700 hours of use or every 4,200km*4. Replace the rollers every 600 hours of use or every 3,600km*


*To find out the number of hours of use or the total distance run, go to the FAQ and read " HOW TO FIND OUT THE DISTANCE RUN AND HOURS OF USE ON YOUR TREADMILL" in the SETTING UP AND USING YOUR PRODUCT section

Running belt lubrication

It is important to do this regularly (every 200 hours of use) to extend your treadmill's life.  1 & 2. Two sprays to the left and right of the running belt will suffice.  3. After spraying, let your treadmill run without anyone on it for five minutes at 5 kph.


Order spare parts for this product



  • T900B

    Need the product's user guide? Click to download.


Composition / advice


Frame // Chassis (for the rollers): 100.0% steel

Cover: 75.0% polystyrene,  25.0% polyvinyl chloride - phthalate-free

Board: 100.0% wood


Store in a dry place away from dust and humidity.


Max user weight: 130kg. This treadmill is designed for use up to 5 hours per week.


Option to access the Domyos E Connected application, available on tablets and smartphones connected by Bluetooth to your treadmill.~The USB jack lets you keep your tablet or smartphone charged and the audio jack lets you play music on the 2x2W speakers.


1. The power consumption of the treadmill can range from 500 to 650 watts for a 90 kg user at 13 km/h.~2. The sound pressure level measured at 1m from the surface of the machine and at a height of 1.60 m from the ground is 70 dBa (at maximum speed 16 km/h, without a walker).~3. The sound level emitted under no-load conditions is lower than that emitted during operation with load.~4. The running surface is 50cm x 143cm.


Our commitments

Domyos guarantees this product under normal conditions of use for five years for the structure and two years for other parts and labour from the date of purchase shown on the receipt.