Any clever bike types here???:thumb: This is the bicycle bike, most of the time the faster/more load applied to the peddles produces a rythmic CLONK (caps 'cos it's loud!) that sounds kinda like some loon following me a belting the frame with a lump hammer. It sounds most like it's coming from the rear gear assembly, 7 speed/gears and I can feel it through the frame but nothings touching/fouling anywhere. Bikes only a couple of years old, any thoughts?