Gravel bikes, sometimes also referred to as adventure bikes, are essentially road bikes designed to tackle a variety of surfaces, carry additional gear, and are suitable for all-day riding on roads less traveled. They are made to be more durable and robust than a standard road bike, along with having an increased gear range and space for far wider tires. They bear a striking resemblance to cyclocross bikes, but there are some subtle differences to note.
The versatility of gravel bikes makes them a great option for multiple cycling pursuits. They are suitable for all but the fastest of road riding, while the wider tires and wider-range gearing make off-road trails, gravel, and fire roads manageable. They are robust, comfortable, and often can carry luggage making them ideal for light touring adventures or for those longer and faster commutes.