The Blue Matic is controlled by a lever on your steer, allowing you to set the resistance as required. The higher the position, the more resistance. The bike is fixed in the trainer easily by two simple clicks. The roll that places the resistance on your rear wheel is made from two materials: a hardened steel sleeve with a soft core of elastogel. The steel sleeve prevents wear of the trainer, while the elastogel aborbs vibrations to reduce noise.