The Hammerhead Karoo 3 is a modern GPS bike computer with a brilliant 3.2-inch touchscreen, precise multi-band navigation and powerful hardware. Features such as Strava Live Segments, CLIMBER without a planned route and seamless SRAM AXS integration make it an ideal companion for ambitious cyclists. Despite its robust construction and long battery life, there are minor weaknesses, such as no voice navigation and limited touch operation in heavy rain. Overall, the Karoo 3 impresses as a powerful device built for the future, suitable for training, navigation and long rides.