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Garmin Tacx® Flux S, Smart and Silent Bike Trainer

Sale price: $650.00 Regular price: $799.00

The FLUX S Smart checks all the boxes when you are looking for a Smart direct drive trainer. Reliable, accurate, silent, strong with a good ride feel.

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Sale price: $650.00 Regular price: $799.00

Free shipping over $35

Final Sale: No returns or exchanges

Free pickup

San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8620987

Product Features

A photo of the Garmin Tacx® Flux S, Smart and Silent Bike Trainer in use

Garmin Tacx® Flux S, Smart and Silent Bike Trainer | The FLUX S Smart checks all the boxes when you are looking for a Smart direct drive trainer. Reliable, accurate, silent, strong and offering a good ride feel.

The FLUX S Smart checks all the boxes when you are looking for a Smart direct drive trainer. Reliable, accurate, silent, strong with a good ride feel.


Measures your power accurately within 3,0%


The most silent flywheel equipped bike trainer available.


Connect to popular training apps, like Zwift & Tacx.


Realistically simulate inclines up to a 10% gradient. 1500W


A large 7,0 kg flywheel ensures the best ride feel.

Product Customer Reviews

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Garmin Tacx® Flux S, Smart and Silent Bike Trainer
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Happy training

Sync’d with ROUVY instantly. Happy training!

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Hi Mike,

Thank you for taking the time to leave a review of Bike Trainer. We're thrilled to hear that you're enjoying the experience and finding it to be a helpful tool for your training.

At Decathlon, we're passionate about providing our users with the best possible experience, and we're constantly working to improve our product to meet your needs. We're delighted that our efforts have been successful in your case and that you're finding value in our product.

Thanks again for your kind words, and happy training!


Flux S Smart

Very good machine. Easy to setup. Dependable. Low noise. Excellent cost to performance.

icon-circle-checkmark verified purchase

Hi Frank,

Thank you for taking the time to review our Flux S Smart home trainer.

We are very happy to hear that it met your needs and expectations and we hope you have the best training sessions to prepare for the spring!


L'équipe Décathlon Ottawa

The Ottawa Decathlon team


Additional Product Information


Smart trainer

The Flux S smart trainer pairs seamlessly with most popular training apps and software to create the ultimate indoor training environment. Easily connect to cycling apps like Zwift, Tacx, TrainerRoad and Sufferfest.

Accurate and reliable

A reliable, accurent and consistent power measurement is key to keep track of your performance and progress. This is exactly what Flux S Smart is designed for, it measures your power accuretely within 3%.

Smooth ride feel

A smooth ride feel and swift responsiveness are key to replicate the experience of your indoor rides. With its large flywheel , the FLUX S ensures the same sensation of riding the road.

Extremely silent

The Flux S Smart is designed to bring vibrations and noise levels to the absolute minimum. This resulted in a very silent flywheel equipped trainer.

Stand alone

The smart electronics of this bike trainer allow you to train stand alone, without any software. It follows a progressive power curve, the resistance will increase progressively when you ride faster. Precisely replicating riding on a flat road.

Connection indicators

Intuitive LED lights provide a visual confirmation when the trainer is powered and connected to a device over ANT+ or bluetooth.

Stable frame

Designed to withstand the most intense training sessions, this bike trainer is built to last. A large footprint ensures maximum stability and durable material give the quality you would expect.

Your favorite apps

Train with your favorite cycling software like Zwift, TrainerRoad and Sufferfest. It is easily connected and controlled by most popular training apps. Race online in the virtual worlds of Zwift, achieve your cycling goals with the training plans of TrainerRoad, or anything else.


Type of trainer Interactive Smart direct drive with electric brake Magnets 8 Permanent ferrite magnets & 8 electromagnets Transmission None Electrical requirements 110-240 Volt Power indicator None Connection indicator (ANT/BT) 2 LEDs Firmware upgradable Yes Suitable cassettes Not suitable for Specialized SCS system , Shimano & SRAM: 8 - 11 speed. Campagnolo, SRAM XD and XD-R body sold separately Suitable axles Width of rear fork: Race 130 mm, MTB 135 mm. Adapters for other widths available Suit


Max. power (40 km/h) 1500 Watt Max. incline 10% Simulation of descent No Max. torque 22.1 Nm Max. brake force 65 N Flywheel Actual of 7 kg Mass inertia 22.8kg (50.3 lbs) Calibration Spin down Footprint (lxw) 670 x 642 mm (26.4 x 25.3 in) Height 460 mm (18.1 in) Dimensions when folded Not foldable Weight 21.3kg (46.9lbs) Article number T2900S

Data output and control

Wireless communication ANT+ FE-C , Bluetooth Smart open Control by ANT+FE-C bike computers , Connect to computer via ANT+antenna , Smartphone , Stand alone , Tablet Output Cadence , Power , Speed Read out on Bike computer , Computer with ANT+ antenna , Smartphone , Sports watch , Tablet Accuracy <3%



Superior quality. Unbeatable prices.

For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.

Decathlon makes the difference
  1. product-research

    Research and development

    delivers high-quality cost-effective products

  2. State-of-the-art production processes

    minimize manufacturing costs

  3. Optimized supply chain

    reduces retail prices

  4. laptop-checkout

    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual