TACX FLUX 2 REVIEW: Quiet Trainer But What About That Accuracy?

[@neillungerer1794]

I've been getting the same issues as to what you are describing around 4min into the video, I've always used my P2 powertap pedals instead because my power measurements from Flux 2 is so much lower than actual power output. Now that my pedals are for service and I need to make use of the smart trainer power, ive noticed again how big the difference is. I need to drop my FTP by 10-15% to be able to complete my workouts. And like you say the higher the power output needed, the bigger the difference. So doing threshold stuff is okay, but going higher into z5 type short intervals it becomes impossible and I need to drop my FTP even more. Where as when I'm using a powermeter it works out perfectly and I JUST manage them (like your supposed to). I've tried finding ways around it or fixing it, but only way for now is to use a powermeter instead. It's pretty annoying though because I sometimes want to use a different bike but then dont have the powermeter, and must make use of the flux 2 powermeter which is so far out that it makes training and tracking the training extremely hard.

[@keesjedejong]

I’m using the Flux2 for five months now. It makes some squeaking noise when it’s cold, but it’s not getting worse over time. I indeed doubt if the wattage is accurate. I have a 4iiii Podiiiium single sided powermeter, which of course is no solid comparison. The 4iiii shows in average around 20-25 watt higher power output. For consistancy I use the 4iiii on my Tacx as well as when I’m riding outdoors. I’m waiting for a software update to reconsider the use of Tacx wattage versus my 4iiii.

[@GravelRacer1]

I love your excellent detailed reviews. The power meter data is really cool. Keep up the great work.

[@TalesfromtheGreenway]

Well I'm on my 3rd on in 10 months and each one had a different issue. This last one was messed out of the box, makes a gurgling sound that cuts through loud music, and the erg mode is laughable. The previous the erg was pretty good but there was a dragging rubbing sound coming from inside the unit. I think there should be a wide spread recall on these, check the horror stories on the Facebook user group. Did I mention the smell at first yikes!

[@ickeausberlin36]

Whenever I think about investing hundreds of dollars to replace my dumb rollers I just have to go to the comments section.

[@jameswaring2860]

Just joined the UK owner’s group after receiving my Flux 2 a couple of weeks ago. Massive issues with ERG mode and spikes in resistance on steeper gradients. Power also seems way off making it impossible to complete workouts. Mate with a new Flux S having similar issues. Should have stuck with my cheap wheel mounted one :/

[@TalesfromtheGreenway]

@@jameswaring2860 if you go to the Facebook user group there is a file section and you can download the previous firmware. That seems to have helped some people. facebook.com/groups/1246355348749602/?ref=share

[@jameswaring2860]

@@TalesfromtheGreenway Thanks for the tip :) I’ll give it a whirl! 👌🏻

[@christianb7]

Thank you so much for this video. I was convinced that my trainer wasn’t behaving correctly regarding power, but garmin didn’t believe me. Then I came across this and it sounds exactly like I am experiencing with the power. They have now offered to replace the unit :)

[@SmartBikeTrainers]

Perfect. Glad you were able to resolve the issue with Garmin! Thanks for watching.

[@marcusvaldes]

Thanks for the video. Probably still going to get a Neo 2, but who knows....

[@donumali8416]

So among the three flux 2, saris h3 and magene t300, which one would you recommend for someone who would like to train (not professionally) and improve performance?

[@PabloFernandez-iu9tj]

Was the accuracy issue resolved with Firmware update? Thanks!

[@morenohau]

Nice video... Between a tacx flux 2 and a jetblack volt, what would you recommend?

[@macbookmoralesgiraldo7426]

Hi, excellent video. Do you know about cadence reading accuracy? My Flux 2 sometime seems to be inaccurate and I do not know how to fix it. Thanks.

[@kostassarad9729]

nice video inserts 7 cassette inside??

[@TalesfromtheGreenway]

Anyone else buy one and notice a terrible smell? Like mothballs, they posted on their website saying it's normal!?! and should go away. I can tell you that the smell was so potent it would make someone sick and If you have young kids... Could smell it a couple rooms away when I woke up. Also anyone else unable to get it over 600 watts in a sprint?

[@AndrePhilosophy]

wich softwer you use to make thes graph ??

[@topfluffer]

My new trainer does not seem to apply proper gradient changes in zwift. Tried via ant. Then changed to Tacx training app on phone via bt and everything seemed fine

[@moniquerich4340]

Hello, ,Do you think SmartTrainers are a good option for Weight Loss? If you could only have one, would you purchase a Direct DriveTrainer, a Bikeerg or a quality Spin bike.Thank you ..Interested in everyone's opinion.

[@RB-er4nf]

Yes, it could be a good option but you should keep your heart rate low (approx. 70 % of your max. heart rate) during the training. It also means that you have to do long trainings if you want to burn enough calories to weight loss.

[@danielriechers2891]

Have you considered that there are performance losses over the chain? The power at the pedal is automatically greater than at the cassette because of these losses. This also explains the differences between the chainrings. Or what do you think?

[@SmartBikeTrainers]

I do account for location of the powermeter but that should only be 1 or 2%. Also, it doesn’t explain why it’s ok in sim mode but not erg mode. Measurement should be the same regardless.

[@bilalchohan553]

What would you buy, a flux 2 or the magene gravat 2? Both available here in Taiwan, but I am worried about the accuracy on the flux and it's reliability. That being said, there isn't too much about the gravat, but it's really quiet. A side note, I do have Assioma power pedals. 😀😀😀

[@SmartBikeTrainers]

I don't have the Gravat so I can't comment on that. So to answer your question, if you have a Tacx NEO in Taiwan, I would go with that.

[@bilalchohan553]

@@SmartBikeTrainers neo it is. 😀😀😀

[@h4nn0S]

thx for the video. best in class for smart trainers :-)

[@SmartBikeTrainers]

You're welcome!

[@petef15]

I keep seeing these pop up in stock on websites and then every time i research a tacx products i see problems.

[@letrudo76]

Hi. Loved the video. Is the Flux 2 compatible with SRAM MTB XD 12 speed cassets? Thanks!

[@SmartBikeTrainers]

Not out of the box but You can purchase and adapter for the XD body here tacx.com/product/bodies-direct-drive-trainers/

[@RixtronixLAB]

Nice video,thanks:) comparing with Magene T300, which one is better? how do you reckon?

[@SmartBikeTrainers]

I did hear good things about the T300 but Unfortunately I don’t have one to compare and be able to better answer your question.

[@RixtronixLAB]

For this tacx flux 2, have you tried 39-23 with 12% gradient, does it generate the accurate power exactly like the real climb ? thanks

[@jorgemendez1062]

Hi, could you tell me what app are your using in this video to train in the erg mode?, I'm using the tacx training app but I'm not sure if I in the erg mode since the watt output field if diffetent from the watt resistance that I set in the app, or there is something that I missing up? , thanks in advance, I'm new in your channel, and it has help me a lot.

[@SmartBikeTrainers]

Which one are you referring to in the video? Generally I use Zwift, TrainerRoad, Xert, and the Sufferfest to test out trainers.

[@jorgemendez1062]

@@SmartBikeTrainers thanks for answer, it the app You showed at 3:47 minute, I think it is TraineraRoad.

[@SmartBikeTrainers]

That’s The Sufferfest kzbin.info/www/bejne/bnK9gIprZ719aJo

[@foxhound143]

is this compatible with xx1 eagle axs 12 speed?

[@mikejfinch8216]

excellent review...

[@viefeld]

Hi, i have purchased a flux 2, using a 10 speed shimano casette, as well as on my TT Bike with an DI2 Ultegra. But i can't change to first gear. And all the other gears cranking as well. I assembled as it should be, using the 1mm adapter for the 10 speed casette. Is there a another adaptor to use? Are you using a 10 speed casette (lookslike)? Thanks for your help.

[@SmartBikeTrainers]

I have a 10 speed as well. If your cassettes came with a spacer, you might want to use that as well so that will be two spacers. Also, you might need to make small adjustments to the rear derailleur.

[@TalesfromtheGreenway]

Yes I used 2 spacers for 10speed

[@MrVersix]

Squeaking noise after aprox. 2 months. Need to send it to warranty ...

[@donaldcoley8576]

I am having problems connecting my speed it will not read

[@PetrKrysenko]

Hi, Thanks a lot for the review. Tell me please. I just bought flux 2 and trained for the first time on it, sometimes when I accelerated to 240-250 watts, there were single clicks, what could it be? And it seems to me that my simulator emits a strong vibration, can it be a marriage or is it that I have a small room?))

[@TalesfromtheGreenway]

Go to the Facebook group for flux owners there was another couple people with the same problem. facebook.com/groups/1246355348749602/

[@TheMaluff]

im betwen this and the Elite Suito 2... which is better?? thanks!!!

[@reedaskey6065]

Aero Drone Maluf Caruso there is no Suito 2, but I had so many issues with my Suito.... warranty was with Elite for 3.5 months total, ended up asking for my money back for a month of this. While they’re customer service is nice, I haven’t talked to anyone who hasn’t had issues with their elite Suito.

[@TheMaluff]

@@reedaskey6065 thenks!!!

[@Alimarek]

Was the issue already fixed?

[@cusebike5391]

I still have the original Flux but swaped it out for the CycleOps H2 this winter. A world of difference. I'd sell the Flux but there were so many problems associated with the introduction of the Flux that I'm hesitant to pass it on to someone else. It still functions but not without issues. And I was able to purchase the H2 for $100 less than the Flux 2. Win, win. It will take more than a Garmin purchase to intice me back to Tacx.

[@SmartBikeTrainers]

That’s a solid deal you got on the H2 👍

[@cusebike5391]

REI member discount which is available again starting Friday. I have no affiliation to REI.

[@SmartBikeTrainers]

Another sale is going on tomorrow as well. Get your wallet ready 💰😂

[@dhcortes55]

Is the difference of 10% to 15% gradient worth $150?

[@SmartBikeTrainers]

Depends. But, I would go with the 2 regardless if you are looking to get a Flux. But if you are looking to only do workouts in Erg mode, then that 10% should be more than enough. But for riding in sim mode and climbing, I would go with more incline.

[@Sophie-ne4fi]

What cassette do I buy ?

[@SmartBikeTrainers]

Do you know the type of cassette you currently have on your bike? 10speed, 11?

[@Sophie-ne4fi]

@@SmartBikeTrainers no I don’t know, how do I tell? Do they both have to be the same type?

[@SmartBikeTrainers]

Yea they have to be the same type of cassette. So if you have an 11, then you should get an 11. Can you take it to a local bike shop?

[@Sophie-ne4fi]

@@SmartBikeTrainers yes will be doing that today thank you

[@PabloHernandez-my2ex]

Hello! Any updates on the accuracy issue? tnks in advance!

[@andreassiegenthaler9545]

There was a firmware update in October and my power readings seem to have changed since then, but no idea if it is more accurate......(I don‘t have a powermeter)

[@aounjose]

I am in the process of getting a trainer and I’m between the Wahoo Core and the Tacx Flux2. Which one do you recommend?

[@SmartBikeTrainers]

+Jose Aoun I think the Core offers better accuracy and road feel.

[@aounjose]

@@SmartBikeTrainers Thanks for the feedback I will follow your suggestions!

[@pablorodriguez5100]

@@SmartBikeTrainers is this still your assessment? I have read many negative reviews of the Wahoo Core

[@SmartBikeTrainers]

Yes. They had issues at the start but seems to be all resolved now.

[@tomioa2547]

Flux Smart T2900 (556,44euro) or T2980 FLUX 2 Smart (832,57euro) what is your opinion....

[@SmartBikeTrainers]

I would still go with the Flux 2 if you want to stick with the Flux.

[@markstone722]

What can I say 7 flux machines in 14 months. Really feel that the units weren't properly tested before shipping. Not even a heavy rider 71kg.

[@SmartBikeTrainers]

Because of the accuracy issue with the Flux 2, I would recommend looking at a different trainer until Tacx release a fix. My top recommendations for an alternative trainer: www.smartbiketrainers.com/2018-best-smart-trainer-for-zwift-6406

[@SmartBikeTrainers]

Enjoy the outdoors! So much might change before the Fall.

[@chrisoliver6690]

My Flux 2 power is way out, what can i do about it, will Tacs replace it?

[@SmartBikeTrainers]

Contact Tacx or store where you bought it from. It should still be under warranty.

[@chrisoliver6690]

@@SmartBikeTrainers Thanks

[@ricklacasse]

I read the manual, if you can call it that, and didn't find anything about an on/off switch. Do I keep it plugged in the whole winter season? I use the trainer 3-4 times a week. Thanks. Reply to [e-mail].

[@SmartBikeTrainers]

There is no On/off button. I usually leave it plugged in.