The magnetic resistance works by creating resistance against the flywheel through the use of magnets at the end of the resistance column. Over time, if the magnetic column has been left for a long period under tension, then the column can loosen and therefore slip under the higher magnetic force.
If your bike is still under it's 2 year warranty we can send an engineer to rectify this for you. If the bike is outside of this period then we can quote for repair accordingly when provided with the required information.
If you are experiencing this issue, please contact us with your name, contact details, address at which the bike is present, and the serial number of the bike starting in 220. This serial number can be found by going into the monitors main menu, properties, and then listing the "Sensor ID".