Tacx Flux 2 Smart Trainer

Price Match
or £19.39 / month
Finance Options
2 Questions / 2 Answers
Add to Basket

Zwift Compatible Zwift compatible

Product Description

The Tacx Flux 2 is the newest and most innovative direct drive smart turbo trainer available. More realistic ride sensation from the newly improved flywheel, gradient simulation has increased to 16%. Have more fun as you train in the comfort of your home with this innovative smart trainer.

The Flux 2 is perfect for road  bikes with both QR and through axles straight form the box. It's also more compatible with mountain bikes. Working with Boost frames using the included adaptor, the clearance on the unit now supports the longer cage rear mechs found on the one-by drivetrains that are common on gravel bikes and mountain bikes.

Key Features:

  • Included with axle adapter for all major axle sizes
  • Max power 2000 Watt
  • Realistically simulate inclines up to 16% gradient
  • The quietest flywheel trainer available
  • Compatible with Zwift and other popular training apps

The iconic FLUX Smart has been upgraded to the FLUX 2 Smart. Compared to its predecessor, it is equipped with a bigger and stronger resistance unit and a heavier flywheel. This resulted in a wider simulation range, better ride feel and a more accurate power measurement.

Challenging Powerful. The FLUX 2 Smart is equipped with a bigger resistance unit compared to its predecessor, allowing for a wider simulation range. It is able to realistically simulate inclines up to 16% gradient.

Accurate & Reliable. A reliable, accurate and consistent power measurement is key to keep track of your performance and progress. This is exactly what the FLUX 2 Smart is designed for, it measures your power accurately within 2.5%

Smooth Ride Feel. A stronger resistance unit in combination with a larger flywheel significantly improved the ride feel and responsiveness of the FLUX 2 Smart. With these improvements, this Smart trainer better replicates the experience of outdoor rides.

Extremely silent. The FLUX 2 Smart is designed to bring vibrations and noise levels to the absolute minimum. This resulted in the most silent flywheel equipped bike trainer available.

Additional Axles. By supplying the FLUX 2 Smart with additional axle adapters, the axle compatibility significantly increased. This direct drive is compatible with 142x12mm and 148x12mm axles, straight out of the box.

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 materials give the quality you would expect.

1 Month free premium. All Tacx Smart trainers come with a free month subscription of the Tacx Premium software. Check out what the possibilities are at the Tacx software webpage

  • Max resistance: 2000 W
  • Power accuracy: < 2.5%
  • Max. simulated slope: 16%1)
  • Flywheel: 7.6 kg (16.8 lb)
  • Mass inertia: 32 kg2) (70.5 lb)
  • Resistance unit: Electro brake
  • Control: Interactive
  • Wireless connections: Bluetooth & ANT+
  • Power supply: 110-240 V
  • Suitable axles: Race 130mm, MTB 135mm, 142x12mm & 148x12mm
  • Suitable cassettes: Shimano & SRAM: 8 t/m 11 speed Campagnolo body sold separately
  • Unique features: Improved ride feel and specifications, Fits bikes with long cage derailleur

Occasionally, without notice, manufacturers change product design and/or specifications.

Smart Turbo Trainer Guide


Smart Turbo Trainers Guide 

How do turbo trainers work?

Most turbo trainers work by fixing to your bike frame with a clamp around the quick release skewer of your rear wheel. This puts your bike into a position where the rear tyre will sit on the turbo trainer’s roller drum. As you begin to pedal, your rear wheel spins and the roller drum turns. However,  If you want to have the full training experience and feel the resistance change as you ride through virtual worlds like Zwift, you will need a Smart Trainer.

What is a smart turbo trainer?

Every big turbo trainer brand now has a range of smart turbo trainers. They are the new big thing in the indoor cycle training market. These turbos use electromagnetic resistance and can be synced wirelessly with ANT+ and/or Bluetooth Smart to your 3rd party training apps, devices, power meters and sensors. This connectivity can greatly enhance your training regime and open up fun virtual training apps to keep you motivated.

Zwift, BKOOL and other training apps can automatically change the resistance of your turbo trainer opening up the possibility of sprint training, intervals and even simulate climbs of up to 20% gradients.

You can also use apps to pre-load a set training plan to follow or plug-in GPS data and ride famous cycling routes from around world while viewing the route on your computer or smart T.V.


Zwift virtual training app

Zwift logo

Zwift is powerful training app where you can challenge yourself against other real-world riders to a race in a 3D virtual environment. Zwift distinguishes itself from other training apps by offering a video game-like experience with immersive virtual worlds for you to ride in. As well as structured workouts, Zwift gives you the opportunity to join group rides with other riders of a similar ability and even compete in online races. It’s a great way to mix up your training and have a bit of fun.

Your power is measured by the watts you produce, which is then used to move you forward through the 3D environment. Speed is also adjusted by your height, weight and even the road gradient for added realism. We have made a Zwift guide that gives a more detailed breakdown of virtual training with Zwift

Zwift is compatible with a wide range of turbo trainers, indoor bikes and rollers with ANT+ or BLE enabled. Read our Zwift Compatibility guide for more information.

What is a direct drive turbo trainer?

The best smart turbo trainers use Direct drive. These "wheel on" turbo trainers work in a different way to a traditional turbo trainer. Your bike is attached to the drive unit via the cassette, so you do away with the rear wheel entirely. This does mean it takes a bit longer to setup than a traditional turbo, but you get some useful benefits in return.


The flywheel is moved to a central position

This offers a more lifelike feel compared to a traditional turbo where the flywheel is placed behind the rear wheel.


Precision performance metrics

Most direct drive turbos are compatible with a range of power meters, sensors, apps and devices to let you track your performance data. With no rear wheel, there is no tyre slippage or roller drum tension to cause inconsistencies in your data.


Quiet operation

Direct drive turbos are much quieter than a standard turbo trainer as there is no roller or tyre friction to create noise.


No tyre wear

No rear wheel means no tyre. No need for a second rear wheel and trainer tyre, making it that much easier to set your bike up for riding outside.

Direct Drive - Easier to live with

Once the additional cassette that matches the speed and range of your existing one is mounted to the trainer, there is no need for any extra parts. One of the most important benefits of a direct drive trainer is that there is no need for a dedicated trainer tyre or extra wheel.

With a traditional wheel-on trainer there is significant wearing to the rear tyre, so a harder compound dedicated trainer tyre is used, the tyre would need to be changed every time you ride outdoors, and again when back indoors. Some even purchase an additional rear wheel for the other tyre to avoid changing tyres regularly, there is no need for an extra wheel or training tyre when using a direct drive trainer.

Bolt-thru axle compatibility

For bikes that use a bolt-thru rear axle, a compatible axle must be purchased to fit your trainer. These are brand specific to the trainer, the thread pitch and diameter must be the same type used on your bike. Click here to identify your pitch thread

What accessories are available?

Training mat

Training mat

A training mat will protect your floor from marks and damage, as well as sweat. These mats help prevent you skidding around when you’re really powering through and they will soak up some noise.

Sweat towel

Sweat towel

Indoor cycle training will make you sweat. These small towels will cover your top tube to prevent damage and corrosion.

Riser blocks

Riser blocks

With a standard turbo trainer, your rear wheel will be slightly raised, giving the feeling of descending. A riser block will lift your front wheel for a more realistic cycling position.


How do I apply for finance?

Spend £99 or more at Tredz and you can spread the cost. Pay monthly over 6-48 months, interest free (dependent on repayment terms and amount).

1Fill your basket with everything you want from Tredz and go to the checkout.

2During checkout, select the finance option you want as your method of payment.

3You will be sent to our finance provider's secure server to complete your application.

4Finance providers PayPal & V12 will use the information provided to make a decision and complete checkout if you are approved.

Read more about buying on finance

Flexible finance options

Choose your deposit.

Choose your term.

£699.00 Your basket + this product

Lowest monthly cost

£19.39 15.9% APR

per month

for 48 months

Best £0 deposit / 0% interest

£58.25 0% APR

per month

for 12 months

Open Finance Calculator
V12 Representative Example: If total purchase price is £1,399.00 with a deposit of £139.90 (10%) and your selected term is 36 months Classic Credit 15.9% APR Representative (interest rate 8.17% fixed), you would pay £43.55 per month. Total amount of credit will be £1259.10 with a cost of credit of £308.70 after a deposit of £139.90. Total amount payable is £1707.70, subject to terms and status.
PayPal Credit Representative Example: Representative 21.9% APR (variable), Purchase interest rate 21.9% p.a. (variable), Assumed credit limit £1,200.00.

Delivery & Guarantee

UK Delivery Information

International Deliveries – Temporarily Suspended 11/11/20

Note: We are still offering deliveries to the Isle of Man, Scottish Highlands, Scottish Islands, Channel Islands, Isle of Wight, Jersey and Guernsey. 

Courier Delivery update: Due to the COVID19 situation, we are currently experiencing some delays with deliveries. Our couriers are working around the clock to get your order to you as soon as possible but there is a potential delay of up to 48 hours . Please check your tracking on track your order here.

Please download the TNT Track and Trace App for iOS here and Android here so you can keep an eye on your delivery and any further updates.

Please note on the TNT tracking app it may show your delivery status as ‘Collecting’ (as per image below). This means your delivery has left our warehouse and is currently held at TNT main depot and there could be up to a 48 hour delay.

tnt delivery

Please keep checking the TNT tracking for further updates. On behalf of TNT we apologise for any delay and inconvenience this may cause. 

We are committed to offering fast and free delivery, whether you're ordering bikes, accessories or clothing. Our standard delivery service is FREE in the UK, regardless of the size and on all orders over £20.

Please note that bulky products and bikes shipped to outlying UK regions are excluded from free shipping.

Please note that Pre-Order dates can sometimes change due to updated stock information.

Click here for more UK and international delivery information.

Returns & Warranty

It's easy to return a product with our 365 day, hassle free returns. 

We will give you a full refund on any item that is returned to us unused/unfitted, in a resaleable condition and in its original packaging (where possible).

Please note: For hygiene reasons, we cannot accept returns of facemasks, undershorts or underwear if the item has been removed/unsealed from its original packaging.

If your item develops a fault or arrives damaged, please contact us first so we can resolve the issue for you as quickly as possible.

For more information please visit our Returns & Warranty page.

Show finance options for:

Available finance options:

Months / APR Per month

Finance provider options available