This Trek 3900 mountain bike features a sleek silver and black design with a durable 16 frame. Perfect for off-road adventures, this bike has been well-maintained and is ready for its next challenge. The bike type is a mountain bike, with a wheel size of 16 inches and a frame size of 40 cm. The brand of this bike is Trek, known for their high-quality bikes and excellent customer service. The bike is in good condition, with no major issues or wear and tear. This bike is perfect for any cycling enthusiast looking for a reliable and sturdy mountain bike to tackle any terrain.