TACX - Technology

The flywheel, ensures that the feel of open-air riding is faithfully replicated, such as your bike not stopping when you stop pedaling and the dead point of your pedal stroke. Tacx basic trainers feature a metal flywheel whilst the more advanced models have a virtual flywheel which is controlled electronically. Unlike real flywheels, virtual flywheels can modify the mass inertia, i.e. the energy necessary to turn the flywheel, to adapt it to precise conditions, such as speed and gradient. This ensures a more precise simulation of the rider’s weight.

The basic principle is that the heavier the flywheel and/or mass inertia (for virtual flywheels), the more realistic the cycling experience.

The Tacx Basic range of trainers features a magnetic brake Resistance is created by permanent magnets, which do the job so effectively that no electricity is required. The Booster features two rows of magnets whilst other basic trainers (Blue Motion, Blue Matic, Blue Twist) only feature one row and a disc.

A change in the position of the magnets will increase or decrease the magnetic field. The magnets’ position can be altered manually via a dial on the brakes or the handlebars which offers up to 10 different positions.

The Smart models feature a combination of different systems. The entry-level model features a magnetic brake identical to that present on the basic models.

The more advanced models are fitted with an electromagnetic brake. This type of brake consists of a row of electromagnets and a row of permanent magnets with a rotating disc positioned between them. The level of resistance is modified automatically, via a smartphone or tablet device, by increasing or reducing the current via the electromagnets. These models require electricity.

The most advanced models feature a motorised electromagnetic brake, which ensures an even more realistic experience. Resistance is calculated and generated by an electrical motor. The motor can break but also drive both the wheel and chain, thus simulating descents – just like riding outdoors, you don’t have to pedal. Descent training is useful as it enables you to realistically simulate the dead point of your pedal stroke. The motor brake is very powerful and can generate very high levels of resistance at low speeds. Such characteristics make Tacx trainers with motor brakes perfect for simulating mountain conditions.

The motor can also function wirelessly, i.e. via a generator which powers the system by you turning the pedals. The trainer uses this energy to communicate and produce the desired resistance. As the trainer does not require an external power source, it can be positioned anywhere you like.

In addition to the type of resistance or inertia, the transmission characteristics vary across trainer models. Most Tacx models feature roller transmission . This system is very simple as you merely place the back wheel on the roller which will create the link with the magnetic or electromagnetic brake.

The more high-end models are designed around the Direct Drivesystem, whereby the bike is attached to the trainer with the rear wheel removed. Resistance is directly applied to the rear axle, thus ensuring a very realistic experience and more precise measuring of speed, cadence and power. In addition, there is no tyre wear or slipping. Direct drive is also maintenance-free and bike mounting is very easy.