It has 29 in. wheels and disc brakes which allows you to negotiate obstacles and stop quickly, it's front and rear mechanical disc brakes that inspire confidence and stability. A light single-fingertip pull is all that's required in the wettest conditions on the steepest downhills. Frame material is an important factor in how enjoyable a bike is, it has a lightweight and durable aluminum frame that improves comfort and achieves a modern look. Great looks are one of this bike's main traits, but it is also pretty well-equipped for this price. The main benefit of the larger wheels is that they can get over rocks and bumps more easily and can cover more distance per pedal revolution, it has wide knobby mountain tires, which are wide enough for off-road riding. This bike has a 21-speed drivetrain so you don't need to worry whether or not you'll have the right gear for a steep climb. Designed with optical gear display indicator to show you the gear position. Ergonomic design for more comfortable operation. Color: Blues. Gender: unisex. Age Group: adult.