Noise, squeaky on wheel along dirt roads.

Hello, I have a 4x4 Tata Xenon truck which is very well for complicated land, but every time I put it to dirt roads, gravel, sand, it is crying, a chillido on the wheels very upset, when you reach the asphalt in a few minutes the noise disappears. In fact, it is the only problem I have had with the truck since I was new, and I have not been able to solve ... I will be very grateful to your comments, greetings.