These durable machines are designed for all terrain conditions. On road or off, these are the most versatile of all the bicycles. While they are not as efficient as a typical road bike, their durability and control features allow the rider to travel on any surface from pavement to rugged terrain. Expect these bikes to shift your weight forward onto the handlebars since distribution of weight onto the front axle is important to maintain control in slippery conditions. Mountain bikes, or ATB’s, are available in a variety of frame sizes and with either 26”, 27.5″, or 29” diameter tires. You might choose one with only a front suspension or both a front and rear suspension.