This page will explain all the features that are of influence on the cycling experience, such as cycling smoothness, inertia and all extra features that comes with the trainer.
The T2900 FLUX Smart is equipped with a 7kg (15,5 lbs.) flywheel. This heavy flywheel creates a large mass inertia effect for a realistic smoothness while cycling indoors.
Performance in different simulation modes
In general there are a few simulation modes or different types of workouts as we call them. Every trainer responds or performs different in each of these workouts.
Slope, video, VR and GPS training
Each trainer is specified with a maximum slope. The maximum slope is calculated with a body weight of 75kg in reference to the strength of the resistance unit with a speed of 10km/h. When your body weight exceeds 75 kilograms, the maximum slope of the trainer may differ. The opposite happens in case you are lighter than 75 kilograms.
Note: The maximum percentage gradient is calculated with a body weight of 75kg in reference to the strength of the resistance unit with a speed of 10km/h.
ERG training (power based training, Watt, FTP)
During a power based training the resistance unit tries to hold the desired power or resistance level set by the application being used. The power output created by the cyclist is measured and the resistance unit will adjust to match the desired power level. The time to change between power levels is influenced by the strength of the resistance unit, the weight of the flywheel and changes in speed or cadence. the heavier the flywheel is, the more power the resistance unit needs to make the adjustments.
Note: The T2900 FLUX Smart has a very heave flywheel and a relative small resistance unit.
The FLUX has a larger flywheel, which means that the FLUX braking will react quicker on speed variations. This means that when you reach a setpoint 200 Watt, the brake will stop for a moment and then you need to add force.
ERG training Tacx FLUX
This document explains how an ERG training; also known as Wattage or Power training, works with the Tacx FLUX Smart.
What is an ERG training?
In an ERG training, the trainer holds the desired resistance level set by the software.
The image below shows an example starting at 150 watts, going to 225 watts, back to 150 watts and so on. These programs can be made by different apps.
Image: creating an ERG training in the Tacx cloud website to be performed in the Tacx Training app (available for Android and iOS tablets and smartphones).
How does it work?
To clarify how it works, we use an example with a certain gear setting and cadence. Please see the diagram below demonstrating
the amount of wattage that a FLUX trainer can produce. Used in this example is a 39 tooth front chainring and a 19 tooth rear cassette (these values are written down on your cassette).
Graph: the power levels of the FLUX at a certain cadence, for gear setting: 39 tooth front chainring and 19 tooth rear cassette.
The blue shape represents the available resistance levels of the Tacx FLUX Smart (T2900). At a cadence of 75 RPM, the FLUX trainer can power up to 400 watts in the 39-19 gear setting. Meaning that you can perform a wide variety of training sessions. It is not possible to produce power levels below or above this shape in this gear setting. If you wish to do so, you have to shift your gears. For example, at a cadence of 75 RPM you have an output of 100W. If you wish to ride with a lower wattage, you need to change gears; between 21 and to 28 tooth.
Using another gear setting will change the starting point; the lowest and highest possible power level at 0 RPM. This way you can determine what the best gear setting should be for your training.