Hub gears are a type of internal gear system commonly used in bicycles. They are located within the rear wheel hub, allowing for smooth gear shifting without the need for external derailleurs. This design protects the gears from dirt and damage, making them ideal for urban cycling and all-weather conditions. These gears typically offer a range of speeds, often between three to eight, providing versatility for different terrains. Hub gears are known for their low maintenance requirements and durability, making them a popular choice for commuters and casual riders who prioritize convenience over high performance.