Speed and cadence sensors, cardio straps, rubber bands and supports for mounting the computer housing, small parts and mounting kits of the most popular brands - Sigma and Garmin - protective covers nad any kind of accessory you're looking for you can find it all in this section. Often there is no need to replace a cycling computer because you simply ruined a mount or you lost a magnet, you can simply purchase some spare parts to carry on using your same device.