These revolutionary new rollers by Tacx move with the rider. He can make sprints, stretch his legs and stand on the pedals without having to be afraid to fall. He can move more freely, because training on the Galaxia approaches the natural feeling of the road. Thanks to the kinetic energy that is created during accelerating, the trainer moves forward. When slowing down, the trainer moves backward again. This invention is so unique that it has been patented by Tacx.