That first test was done in the small chainring. ERG mode in the small chainring (zoomed in) When in ERG mode, the flywheel speed will hardly go over 20mph and it will most likely be lower than that as long as you remain in the small front chainring.Įven in sim mode, the flywheel itself will hardly spin that fast but as I do with all my noise demo videos, I like to run the trainer at the two different speeds just so you hear the noise level at both extremes.Īs you see in the chart below, the third interval target was 420 watts but I was realistically pushing over 500 watts according to my Assioma pedal based powermeter. The noise you hear at 20mph is what you will hear most of the time. You can listen to the noise in my YouTube video review, I ran the Flux 2 at 20mph and then at 30mph. I also tested it with The Sufferfest on iOS and it connected fine and the app was able to control the trainer in ERG mode. It paired fine with Zwift and TrainerRoad in both ANT+ and Bluetooth. It can be managed with Tacx Training or Tacx Utility app. It can interact with a multitude of apps, software, computers and devices (smartphones and tablets) with iOS, Android, OSX and Windows. The Flux is totally interactive and ANT+ FE-C, and Smart Bluetooth compliant. I also found the Flux 2 to offer better inertia than Flux S or original Flux. The Flux 2 road feel is good when comparing it to other mid-range trainers in its class but not as good as high-end trainers like the NEO for example. But here is a perfect example of how bigger isn’t always better and looking at the number alone doesn’t give you a good indication of how the trainer feels. The Flux 2 has a 7.6 kg (16.8 lbs) flywheel which is heavier than Flux S and other high-end trainers. With direct drive trainers, you need to run the calibration once every 7 to 10 days or if you move the trainer around. Once you perform the initial calibration, you should be all set for a while. Before you perform calibration, warm up the trainer for about 10 minutes. The calibration can be done using the Tacx Utility app as well. Once you ensure you have the latest firmware, you need to run the calibration to ensure the brake is set properly. The firmware can be updated wirelessly using the Tacx utility app and you will be prompted to upgrade if there is a new version. Once assembled, you should pair it to the Tacx utility app available for iOS and Android devices to check to see if there is a new firmware available. If you need a cassette plier, the Feedback Sports cassette plier and Cassette Wrench are one of my favorite and easy to use. You can purchase an 11-speed Shimano 105 cassette for about $45 but if you are still on a 10-speed cassette then you can save a few dollars and get a 10-speed Shimano 105 cassette for about $50. Campagnolo is compatible but you need to get a separate adapter. The Flux is compatible with 8-11 speed Shimano and SRAM. The legs are simple to install and took me a few minutes to do.Īlso, you need to provide your own cassette and install it. When you take the Flux 2 out of the box, you will find the trainer, power cord, manuals, and all the tools you need to put the legs together. Here is the a spec table between the Flux S and Flux 2: ASSEMBLY & CALIBRATION The Flux 2 also costs $150 more than the Flux S The Flux 2 offers a little more power, heavier flywheel, better advertised accuracy, more slope support, and Tacx is including the 142mm & 148mm adapters with the Flux 2. You can read my review of the Flux S here. Tacx announced the Flux 2, then introduced a slighly modified and updated version of the original Flux and called it Flux S.
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