I can hear a knocking in time with the wheel rotations coming from the rear of the car, but it only seems to happen on throttle. Even when I'm ever so slightly on throttle, I can hear it. It's mainly up to 40mph give or take, but whether the noise stops here or whether I just can't hear it over the exhaust or it becomes too regular with the wheels at that speed, I don't know.
Any ideas? Sounds more like a knock than the click you get from nails/stones in your tyre.
