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Tacx FLUX S Smart Trainer

Josh Matthew February 9, 2021
2.00 out of 5 based on 1 customer rating
(1 customer review)


Reliable, accurate, silent, strong plus a heavy flywheel for a realistic ride feel


In stock


Tacx FLUX S Smart Trainer

If you’re looking for a smart trainer but don’t want to break the bank, the Tacx FLUX S Smart Trainer is your answer. It’s reliable, accurate, silent, strong and features a heavy flywheel for a realistic ride feel. The Tacx FLUX S features ANT+ and Bluetooth SMART compatibility which makes it compatible with all of the popular training apps such as Zwift, TrainerRoad and more. The trainer is also built tough. It can handle sprints of up to 1,500 watts, can simulate climbs up to a 10% incline and all while measuring your power within 3.0%!



Train with Confidence
The FLUX S Smart is designed to provide a reliable, accurate and consistent measurement of your power, speed and cadence, so you can keep track of your performance and progress. It measures your data accurately within 3%.

Powerfully Built
The well-balanced design of FLUX S Smart ensures maximum stability when cycling in even the most explosive sprints. It powers up to 1,500 watts, and you can train on realistically simulated inclines up to a 10% gradient.

Smooth and Silent
At 15.4 lbs., a heavy flywheel ensures a realistic ride feel and good responsiveness of FLUX S Smart. This direct drive trainer is designed to bring vibrations and noise levels to the absolute minimum, resulting in one of the most silent flywheel-equipped bike trainers available.

Fully Connected
The trainer communicates with both Bluetooth SMART technology and ANT+, making it compatible with a number of popular cycling training apps such as Zwift, TrainerRoad and more. It can also be connected to multiple devices simultaneously, so you can also track your performance on your bike computer.

Improved Compatibility
The FLUX S Smart trainer comes with additional axle adapters to significantly improve the axle compatibility. This direct drive is compatible with 142×12 mm and 148×12 mm axles – right out of the box.


Tacx FLUX S Specs

  • Accuracy: <3.0%
  • Wireless communication: ANT+ and Bluetooth SMART
  • Max. power: 1,500 watts
  • Max. incline: 10%
  • Output: Speed, cadence and power
  • Flywheel: 15.4 lbs.
  • Footprint: 26.4″ x 25.3″ (670 x 642 mm)
  • Height: 18.1″ (460 mm)
  • Weight: 50.3 lbs.



  • Suitable cassettes:
    • Shimano and SRAM: 8-11 speed
    • Campagnolo, SRAM XD and XD-R body (sold separately)
    • Not suitable for specialized SCS system
  • Suitable axles:
    • Width of rear fork: Race 130 mm, MTB 135 mm
    • Adapters for other widths available


In the Box

  • Tacx FLUX S Smart Trainer
  • Power adapter
  • Power cable
  • Quick release 5 mm
  • 142 x 12 mm adapter kit
  • Assembly kit
  • Manual



1 review for Tacx FLUX S Smart Trainer

  1. Avatar


    This is overall an okay trainer, but when using it at medium intensity there is a resonant frequency that causes my bike to rattle, and annoys my downstairs neighbors. I have to amp it up and maintain a higher than comfortable cadence to get it to stop. I have been through countless conversations and videos with Tacx support, and at one point they sent a replacement, but the replacement was far more defective than my unit and was producing knocking noises. Had I known my warranty was essentially worthless under these circumstances, I never would have purchased this. As such I will be going with a different brand next time.

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