This page will explain all relevant features that will have influence on your indoor cycling experience in terms of ride feel.
A smooth ride feel and swift responsiveness are key to replicate the experience of your outdoor rides. With its large flywheel the FLUX S and FLUX 2 ensure the same sensation of riding on the road. Between the FLUX trainers there is a difference in flywheel weight:
- FLUX S - 7 kg (15.5 lbs)
- FLUX 2 - 7,6 kg (16.75 lbs)
There are a couple of different workout types which could be selected for your training sessions. All bike trainers behave or respond different to these workout types. This section is written to help you understand what the differences are and what to expect. The following workout types are of importance:
- Slope - video - virtual reality - GPS
- ERG mode (power/FTP)
Slope, video, VR and GPS
All Tacx bike trainers are spec'd with a maximum incline value. This value is calculated with a body weight of 65 kg (143 lbs) in reference to the "strength" of the resistance unit when cycling with 10 km/h (6 mi/h). It is important to understand that when your body weight is higher compared to the 65 kg (143 lbs), the maximum incline the trainer is able to simulate will be lower.
ERG mode (power/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, weight of the flywheel and changes in speed or cadence. With a heavy flywheel the resistance unit requires to be very powerful in order to respond quickly to changes in speed or cadence.
Note: The FLUX S Smart has a very heavy flywheel and a relative small resistance unit. However, the FLUX 2 has a very heavy flywheel, but a more powerful resistance unit and therefor is able to simulate a higher maximum incline.
All bike trainers have an operating range that specify the minimum and maximum power range. This range is determined by the your gear ratio and the cadence your are cycling with. This is represented in the graph below. When you change gears, this graph will change.
Graph: power range for the FLUX S with a gear ratio of 39:19.
Important to understand is that when your desired resistance level is out of this range, the bike trainer will not be able deliver the desired resistance. In order to restore this, either the gear ratio needs to be changed or the cadence.
Based on the graph showed above. When in ERG mode a desired power interval is set by the software of 400 Watts at a cadence of 57 RPM, the desired resistance level is out of range. In order to have the desired resistance level you need to have a higher cadence or your need to shift gears.