The GPS bike computer for those who want to get started right away. Large display, easy operation, and 17 functions: The VDO R-Series GPS bike computer shows all the essential data that beginners and minimalists should keep an eye on. In addition to speed, trip distance, and training time, this smart bike computer also offers track navigation and can be connected to compatible eBikes. The high-contrast 2-inch display with its extra-large numbers is easy to read even while riding. A highlighted blue square in the upper right corner of the display allows for a new way of presenting training data. Together with the compatible SIGMA RIDE app for your phone, six different views of the training data can be set up with just a few clicks. The VDO R4 GPS comes with a clamp mounting system that positions the GPS computer centrally on the handlebars, directly above the stem. This mount fits handlebars with a diameter of 31.8 to 35.0 mm. No wiring and no sensors are required.