Garmin and Coros are two of the top brands in GPS bike computers, offering a range of models that cater to different needs and preferences. Among them, the Garmin Edge 850 stands out for its sleek design and a 2.7-inch color LCD touchscreen with a resolution of 420 x 600 pixels. The screen is easy to read even in bright sunlight thanks to a strong backlight. It supports multiple connectivity options, including Bluetooth, ANT+, and Wi-Fi, as well as multiband GPS for precise location tracking. The device has 64 GB of storage, which can store up to 200 hours of ride history. However, its battery life is around 10 hours when used intensively, which is less than some of its earlier models. The Garmin Edge 840 Solar is a lighter and more compact option, weighing under 100 grams. It features a 2.6-inch MIP TFT screen and can last up to 32 hours on a single charge when using its built-in solar panel. The device is compatible with several satellite systems, including GPS, GLONASS, Galileo, BeiDou, and QZSS, ensuring accurate tracking. It also supports Bluetooth, Wi-Fi, and ANT+ for connecting a variety of sensors and fitness devices, making it a versatile choice for cyclists. At the higher end of Garmin’s lineup is the Garmin Edge 1050, which offers a large touchscreen and an NFC function that works with Garmin Pay for contactless payments. It provides 20 hours of battery life but does not include a solar panel. The device comes with a detailed preloaded map and a ClimbPro feature that helps riders assess elevation changes and manage their effort levels effectively. Despite its advanced features, it lacks the solar charging capability found in some other models. The Coros Dura has a distinctive design with a large screen that covers two-thirds of the device’s surface and weighs just 102 grams. It includes a solar panel on the front, allowing it to recharge during rides and offering up to 120 hours of battery life. However, its screen is criticized for having lower contrast and less vibrant colors. The device supports multiple satellite systems and can connect to up to 12 accessories at once. While the Coros app is needed to customize the device, navigation features are limited without a smartphone. When choosing a GPS bike computer, users should consider factors like battery life, screen size, connectivity options, and compatibility with popular cycling apps like Strava and Komoot. Solar panels are particularly useful for long rides but may not be necessary for shorter ones. The reviewed models vary in their focus, with some emphasizing battery autonomy and others prioritizing screen quality or connectivity features. Ultimately, the best choice depends on the rider’s specific needs and how they plan to use the device.